Unplug tps runs better chevy. So I put on a brand new MAP .

Unplug tps runs better chevy Other than buying another new MAP sensor to make both a new TPS and MAP sensor, I am at a loss of what to do next. Alot of times the outlet on the throttle body gets plugged and there is no vacume at the map--causes it to die. You will have to "back probe" the TPS connector to make a accurate reading. May 30, 2023 · Hi There, First time poster - forgive me if I'm doing something wrong. Sep 27, 2021 · See if you can look up how to test the throttle position sensor (TPS). I will try Jan 1, 2014 · no tps,different timing curve for sure,advance from TDC at idle to mid-throttle then switch to retarted timing at full throttle ,with weaker spark,no damages can happen depending wich fuel you use,but you'll end-up with a build up problems into the ports and valves near from it i guess, isn't enough combustion process in there to burn the exceeding fuel and oil mix,as been stated real good Apr 28, 2007 · Well what happened is some gas spilled out ,,no big deal right ? though I did not notice the choke cable was broke and upon removing the carb the piece of cable fell down and shorted the starter battery+} to the solenoid [a Chevy starter] which caused the eletric feul pump to run which when added to the already spilled feul started burning BTW, that is much better than those lame cheap distributor wrenches sold at every auto parts store. I have not unplugged TPS while running. 3. Tim's Auto Repair. Now here is the odd thing. When the engine is running and I unplug the MAF it dies. It should have . 0 maf and ive been battleing a rough idle dying situation. Sep 20, 2013 · I did disconnect the O2 again this morning, once warmed up, but this time the engine started chugging at idle and running really roughlike the choke was on. e. Check to make sure the vacuum that runs to the MAP sensor is full. I do not know the volume. Running with a bad TPS throwing codes (poor performance, mileage wasn't real bad, about 18-23 depending). ) Throttle Position Sensor 9. So then code p1518 went away now I keep getting code p1125. I also put a new O2 sensor in as well. if i hit the throttle at all idles goes way up and wont come down unless i put it in gear after a few seconds the idle will come down to normal Mechanic's Assistant Aug 2, 2010 · there's a good chance the balancer could have slipped meaning zero isn't really zero, but if it runs good unhooked I aint sure. If u unplug the tps it will start as soon as u hit the key and it runs smooth all the way through the rev range . If I did it was last summer. o2's , Does it run better once it's in the closed loop. 5 to . now engine idles high. On average, the cost of replacing a TPS can range anywhere from $100 to $400. It was fine bit rebuilt anyways. 9 Str. I'm out of ideas on what to check going forward. last week it decided to run fine for a day, I think just to mess with me. TPS with scanner connected has a reading of 18 - 24 while sitting at idle. Mark where the rotor is pointing. If when you remove the TPS (throttle position sensor) and the engine runs better, then there could be an issue with the MAP (manifold absolute pressure) sensor. With engine running and the MAP electrically unplugged - then take off the vacuum line to the MAP and see if it sucks tight to your finger. Two codes are p0102(maf or vaf a ckt low input) and p0122(throttle/pedal position sens a ckt low input). No check engine light, engine bucks and jerks under acceleration, can unplug TPS sensor and it runs smooth. If I have the coolant sensor plugged in it idles at 11-1300 rpm, if i unplug the coolant sensor (the one in the head next to the goose neck) it will run at perfect rpm and purr. Of course now there are more modern ways of testing a sensor such as with a multimeter or scan tool. Tried a test with carb cleaner near lower and upper intakes (no results) Replaced Plenum gasket (upper intake). The bucking and studdering are troublesome and the pickup is slow, the timing was getting retarded. I might try swapping the tps sensor tomorrow since I have one laying around, but I don't think thats gonna do much. It was acting like it was miss firing on me so I changed the plugs, wires, cap, rotor and checked the timing and adjusted with EST unplugged then plugged back in. It's actually a very clean, and nice DC5 it just has this issue which is driving me crazy. Jun 28, 2022 · However, sometimes the throttle position sensor becomes loose or gets unplugged. I have read all of the posts about hesitation that I have found, and one user unplugged his TPS. Oct 10, 2012 · Remove the engine's air cleaner by removing the wingnuts. With the tps off we finally got my car to rev all the way to redline where as it stopped at about 4k before. 2. Runs fine other than that. Bought used ECM with vats deleted and vin swapped, new tac module, cleaned and replaced ground behind block, new throttle body and tps, new pedal position sensor, checked entire tac circuit in wiring harness. Changed TPS, but still getting various readings in idle position. If so then it really looks like you have a bad MAP sensor. May 29, 2007 · In Nivo's thread about the TPS fix, he says his TPS would change from 0. I adjusted the TPS sensor to . 7 L with throttle body inj. Mileage went down a little actually. Apr 22, 2009 · Ok so I have this 1986 C4 with the TPI L98. 55 volts key on not running. I have 1990 chevy van and when i plug up the map sensor the van cuts off unplug it it idles like a champ but poor speed 95 chevy 3500 7. I have a 1991 S15 Jimmy 4x4 that I'm restoring - it has a 4. Running with the TPS unplugged: Mine ran better this way then with the bad tps. With Jul 23, 2012 · Except for unplugged tps, which I still don't understand why it would run better that way. The computer self diagnosis blinks on off, so its' not sensing any codes (until I unplugged the tps). Apr 24, 2005 · 1. But it was faster . If the tps is faulty then disconnecting it can help with running but you will get power issues as the ecm does not know what position the throttle plate is at. Jan 9, 2025 · What Happens if You Disconnect the Throttle Position Sensor? Disconnecting the throttle position sensor from the PCM deprives it of critical information required for accurate air-fuel mixture adjustment. Check the MAP sensor and see if the harness is good and free of corrosion. Thinking it may have had a ruptured fuel pressure regulator. May 5, 2019 · The car may appear to run better with the TPS sensor unplugged because that forces the ECU to rely on other sensors to determine engine load but doing so doesn't allow the ECU to optimize the air fuel and spark for other operating conditions like low load cruising conditions or full throttle. A malfunctioning TPS can cause a variety of issues that can affect engine… May 5, 2013 · Nope, key on, fuel pumps run for 2 seconds and no start. Apr 9, 2012 · Code 51 is telling you that the ECU isn't getting the correct signals from the TPS or the AC clutch circuit or the neutral start switch. 7 l Mechanic's Assistant: Which particular sensor are you asking about? And have any trouble codes been triggered? Sep 25, 2018 · The throttle position sensor is functioning as it's supposed to I put a new fuel pump (acdelco) and filter in it. Idle is high and throttle is a bit sluggish like you'd expect from a bad TPS. 3l TBI from an S10 Blazer. Customer: flooding and dies, rebuilt injectors and tb,tried new tps sensor, we can unplug tps and it will run ok just idels to fast to put in gear 95,G20 chevy 5. 7L TBI motor. unplug the throttle position sensor and then rev it up and see if its better. Remove the cap. It idles at 2500 - 3000K RPMS. Please refer to the TPS thread by Nivo Oct 20, 2022 · That's not going to be related to TPS or IAC. Take it for a test ride to see if it goes away. Timing is steady on zero with bypass plug disconnected. sounds fishy to methe 02 produces a minute amount of voltage with platinum emitting voltages under varying conditionsit's like you're pulling the eyes out of the computer brain, yet it still walks---put it back the way it is supposed to be, and look for your troubles elsewhere in performance, like the TPS, the ambient air temperature sensor, the fuel pressure regulatorvacuum to this Aug 5, 2014 · No change in fuel economy. If it only starts on starter fluid and quits running when you quit spraying it, then the engine isn't getting the fuel it needs to run. So I put on a brand new MAP May 18, 2015 · 97 Chevy 5. Feb 20, 2010 · 2000 chevy blazer w/4. My car has ran this bad since I put it in sometime in April. Without this information, the engine will not be able to adjust the fuel mixture correctly and will run poorly Sep 8, 2020 · No change. Chevy Mechanic: Mechanic DK , replied 11 years ago Feb 13, 2013 · I have a 2003 Chevrolet Monte Carlo 3. I have already replaced the MAP sensor but there was no change. A different ecm was installed=no change. 81 just by slamming the door on the car. Apr 9, 2016 · My bike used to not idle properly such as it was fine in neutral but as soon as I kicked it into gear the idle went way up, so I adjusted the fuel screw and idle screw fixed that problem but then my throttle was sticking and its not my cable or throttle tube as both have been replaced and well oi Apr 6, 2010 · I have a EGR issue with my car according to my SEL and will be taking it to the meachinc in a couple of weeks to repair. New parts doesn't always mean good parts, so don't assume the new CTS isn't a problem especially if it's a store brand cheapie. No codes/check engine. The truck has the same rough idle when we plug the old MAP sensor in, but with it unplugged it seems to run better than when we had the old TPS in with the MAP sensor unplugged. Then, make sure to watch the voltage rise smoothly from the idle position as you open the throttle Blake. Car was actually running good for the most part and had nice steady idle, both cold and Sep 29, 2012 · 1969 Chevy c10- 406 sbc, t5 5 speed, 12 bolt, Eaton posi, 3. Thought that was strange since it seemed to run better yesterday with it disconnected. fuel pressure even as it stalls. And also rebuilt the tbi itself. I sill have to press accelerator to start it but then it idles fine. 54v also. EGR as @manbearpig stated and given the age of the truck it could have a vacuum leak in the power brake booster. Are they steady? Shut down, plug in TPS, restart, with engine running, move pedal, are readings and engine speed Aug 5, 2008 · If i understand correctly when you unplug the maf sensor it runs better , this means you have a bad sensor prob. Apparently if you're running lean and you prevent the MAP sensor from getting a signal, the ECM will enrich the air/fuel mixture to keep you running. This usually only happens once or twice, not every time, in the morning and then it will run better. My car has 180000 miles. With the MAP sensor unplugged, I get SES code 34 (bad MAP sensor of course). Have already unplugged high pressure a/c switch and have put new fuel pressure sensor in fuel tank. With the map unplugged it does not surge at idle and the truck runs well. Place the voltmeter's red probe on the the top, rearward terminal of the TPS. Check the FSM or maybe the FI bible and find out exactly what the TPS switch is supposed to do and then decide for yourself. I think my MAF is going out and I was told my map sensor is bad. Mar 10, 2009 · The temp sending unit measures fine, and the tps measures fine. ) All vacuum lines 11. 7 starts and then stall sometimes it starts and will run but bogs when accelerated, it runs and accelerates when I unplug tps, replaced tps and it does the same thing, the fuel pump and sending unit have been replaced, maf sensor new also, and new fuel filter out of money and patience. If I disconnect the MAP sensor it idles and runs smooth. To be sure it's not slipped bump no1 to top dead center with it unhooked, and plug out, or turn the motor by hand to put the balancer pointer on zero on the tab, then pull the plug and see if the piston is all the way up with a screwdriver, or if you do it with the Feb 2, 2009 · Another reason to adjust minimum air is if there has been some repairs to the fuel system. New plugs and wires less than 3k ago I also just got a newer high end obdii reader so I will pull codes asap. com She was no longer starved for fuel which, by the way, is why she ran better with the MAP sensor unplugged. 50 v & not moving with throttle closed),engine coolant temperature,& MAP voltage. My truck runs great but it does have a small surge at idle. If the throttle body has been removed (i. When I unplug the MAP sensor, it smooths right out, and will even idle on its own for several minutes until it finally dies. Jun 10, 2015 · 1987 - 1996 F150 & Larger F-Series Trucks - no engine change when tps is unplugged? - hey fellas, I got a 95 f150 5. Are the O2 sensors there for emissions, or do they help obtain the best mixture? Mar 27, 2009 · throttle position sensor, or check to make sure you have vacume going to the map sensor. Thre voltage you see on the scan tool should be the same as you see when disconnecting the MAP & testing with a Jan 22, 2023 · Unplug Tps Runs Better If you’re having trouble with your car’s throttle position sensor (TPS), you might be tempted to just unplug it. It is located close to the thermostat housing. The TPS shares it's 5V ground with the A/C sensor and intake air temperature. What I didn't do was unplugged the wires from it, which were going to the map and the tps sensor. Why is this so? My car is the 98 Ford Taurus stationwagon with a bad headgasket. 2000 chevy express 2500 running very at startup this morning causing check engine to flash, if I unplug tps, or maf By chatting and providing personal HelloCustomer. Aggghh I need help because I want to sale this car. I unplugged the throttle position sensor for nothing better to do except to wiggle some wires, plugged it back in and it started intsantly. Jun 3, 2024 · Test your throttle position sensor. With all its importance, what will happen if it is unplugged? Will the car stop functioning? Sep 14, 2012 · Also, read the sensor readings (three of them), and the calculated throttle position shown as a percentage, as stated above. My car has an automatic transmission. Still unplugged, start engine and check readings. I doubted him but he was right. Aug 30, 2022 · 1st you figure out what year motor and out of what vehicle it is. Unplug the harness connected to the TPS sensor. 62 volts at wot, which is perfect. So does this mean the car will run better or worse? It's a track only car, so I'm looking for the best performance. If it does then replace the Apr 9, 2010 · Chevy`s that sit are bad about eating the cams if the engine isn`t cycled. 73's, 26x10 ET Drags 1987 Chevy v10- RCSB, 305 tbi, Saginaw 4 speed, 33's on 17" wheels May 21, 2002 · Disconnect TPS, why is she running stronger. The two most important sensors are the MAP then the throttle position then the Coolant temp sensor (CTS). Fuel pressure is 9-13 psi. Sometimes it clears out immediately or a few seconds later. Unplug the oxygen sensor, disconnect the battery to clear fuel adaptives, and then drive it with the sensor unplugged to see if it runs better. long story shot when I unplug the tps nothing changes. A friend told me to unplug the vacum hose that plugs into the top of the EGR valve until I get it addressed and the engine will not ping and run as rough. Since you replaced the TPS, I would suggest you check continuity from the aforementioned circuits back to the ECU. Most often we replaced the part, but made it an example to the customer as to why they needed to disconnect the battery. This guide will show you how to reset the throttle position sensor on your Chevy Silverado, which is key to your vehicle’s performance. does anybody have a clue what is going on here? May 24, 2017 · The truck is extremely sluggish from a stop, smooth , but sluggish. 4% isn't a need for concern. It wouldn't run well, but it would run. Threw a code for MAF so I changed that and the relays. Maintains 12 lbs. 3L v6 throttle body fuel injection, no power, runs poorly, but will build rpms if accelerator pressed lightly and slowly, I have replaced; fuel pump, fuel filter, throttle position sensor, runs better when cold than hot, any ideas? Thanks, DAM1OAK Jul 27, 2016 · This is measured on a multi meter. If it doesn't, the TPS may be bad. Jun 16, 2024 · When you disconnect a Map Sensor, the engine may run in an “open loop” mode, utilizing default parameters rather than adjusting fuel flow based on sensor input. Oct 15, 2018 · I wouldn't worry about that map sensor code until you get it running. This results in several car issues like lack of power, causing a significantly unpleasant – and possibly dangerous – driving experience. 8X at WOT. Feb 11, 2023 · The cost of replacing a throttle position sensor (TPS) can vary greatly depending on several factors, such as the vehicle’s make and model, the TPS’s location, and the cost of labor in your area. 71 to 0. I prefer Delphi for this. Importance of Throttle Position Sensor Cleaning Engine Performance Improvement Driveability is the same as when tps is unplugged, better but not correct. Then removed the brackets the hold the wiring harness. did relearn but now idles high when i put it in gear idle comes down to normal after a few seconds. I watched the TPS videos, but they all start with a good 5v reference. I assumed the MAP sensor was going bad so I did a quick swap from my truck to hers and no difference. The throttle position sensor is responsible for telling the engine how much air is entering the engine. 6 95 F150 because of rough idling. Oct 11, 2023 · Unplug TPS runs better, is it really okay? Though unplugging TPS makes the car run faster, it is not good for the car. I'll rewatch. Jun 18, 2023 · You’re driving along and notice that your car isn’t running quite as smoothly as it should be. Mar 24, 2010 · When I sold auto parts, I ensured my employee's understood to tell the customer to disconnect the battery and quiz them when trying to return electrical parts they installed but no longer work after being installed. Feb 23, 2017 · Hello. All other sensor readings are within normal range. Every thing runs perfect now with all sensors and IAC connected!! Apr 6, 2017 · 1987 - 1996 F150 & Larger F-Series Trucks - Truck Runs Great When I Unplug the MAP Sensor - I replaced a MAP sensor on a 4. May 11, 2023 · If you disconnect the throttle position sensor (TPS), the engine control system will no longer receive a signal indicating the angle of the throttle valve. I already replaced the tps,map sensor,injectors, distributer , fuel pump and filter, ecm. Customer: i have a 99 r/t dakota it is running rich when i unplug the map sensor it runs better still rich i have put a map sensor on it and a tps Answered by Mopar Certified in 3 mins 14 years ago Mopar Certified The throttle position sensor (TPS) is a critical component in the operation of your Jeep Grand Cherokee’s engine. Still reduced power mode. Now that's just me, but for you it may be better to be safe than sorry. Aug 8, 2023 · How Much is a Replacement Throttle Position Sensor? Be prepared to pay anywhere between $10 and $600 for a throttle position sensor. Unplugging a sensor to see if it will make any difference is an old-fashioned way to test a sensor on an engine. The other thing pretty common on the TBI 4. Then you clean up the mess and make sure that all the connections, splices, sensors, air intake, etc are connected, clean and working properly, cuz it will never run right if it isn't, nor will the diagnostic system work either, nor will it be a reliable rig. Mar 24, 2013 · High idle with IAC plugged in, replaced IAC Still high idle checked TPS, OK Unplug IAC, Runs perfect. Feb 22, 2024 · Originally I was getting code p1518. Pull straight up. 11 Best Air Ride Suspension for Semi Trucks and Chevy Trucks; Why would a car run better with the mass airflow sensor unplugged? The mass airflow sensor is one of the most important sensors in the car and it functions to help the car run perfectly. But if I unplug the MAP sensor, it runs fine. Locate the TPS sensor on the passenger side of the throttle body. I have also unplugged tps which makes it run like crap and die, and if I unplug the icv ( idle control valve) it gets worse. the throttle position sensor should be live data scanned on a scanner and watch for a smooth voltage sweep . Has since I've had it. All measurements should be made from the positive and negative 5V power wires NOT ground. It monitors the position of the throttle valve and sends signals to the engine control unit, which adjusts the air and fuel mixture accordingly. I think my little 0. rebuilt or cleaned) or the TPS (throttle position sensor) has been replaced or otherwise disturbed (i. Mar 5, 2011 · I took the fuse out a couple of months ago, because I thought it might be draining my battery. once i'm going down the road the vehicle runs fine and throttle reponse is good. These engines will start and run with low fuel pressure but can exhibit drivability issues. May 27, 2012 · My blazer is running crappy. It will start but not idle. 4l won't stay running Aug 16, 2010 · So determined not to do exactly what I'm doing now,{post a question about tbi on a this board] I tried it again, this time bringing the engine up to running temp, Setting the timing to 0*, plugging the wire in and checking advance,[ it will only advance 8* when revving the motor with the wire unplugged or plugged in] shutting off the truck and Jun 27, 2005 · If I unplug them, the service manual says the vehicle will operate in Open Loop, and will use only the TPS, temp, and MAP sensors to control Fuel/air. also when I take the vacuum line of the fuel pressure regulator the truck runs better. 4L with DTC P0453 and P1635. I did not wiggle connections while running. Customer: i have a 2009 chevy 1500 i replace the throttle position sensor and cleaned the throttle body. It should start and run with that code present. No Matter which sensor is installed it only loses its sluggishness while Customer: Have a 1999 Chevy S-10, 2. Jan 29, 2011 · 1994 chevy with 5. I always start with a scan tool to check for failure coses & then view the data with engine off/key on to look at the TPS (should be around . After all, if the TPS isn’t working properly, it can cause all sorts of problems with your car’s engine. Nov 12, 2016 · Hi there. I don't have a Helms manual yet sorry so hope someone would point me in right direction. 7XX at idle and 3. Follow our guide to use the right tools, prevent future contamination, and avoid common issues like stalling during warm-up or unstable idle speed. If you unplug TPS while running idle drops to about 600 Aug 3, 2005 · Ok today while trying to fix my car me and my friend just started playing with the timing and tps. ) Coolant Temp Sensor 12. When TPS is unplugged, excess air gets into the engine, which burns excess fuel. Mar 21, 2009 · Personally, I did away with alot of crap that clutters the L28 motor and my car runs fine. No codes on the SES light. Have owned a Customer: unplugged Throttle Position Sensor and truck runs good, but idles high [this is with idle adjustment screw turned all the way in]plug Throttle Position Sensor back in and truck idles where it should but won't accelerate is there any way to leave TPS unplugged and get the truck to idle normalat least so I can drive it long Customer: I have a 1995 motor home it is powered by a chevy P-30 truck chassis The motor is a 454 big block, transmission is a 4L80e (?). I'd say 0. Your problem can be several different things. 01 of variance at idle must be normal I think the usual TPS value must be 0. When I do this, the truck performs great in all throttle positions. I unplugged the MAP sensor and the throttle response is so much better. Sep 12, 2014 · Eventally it died, would start right back up and run if you kept your foot in it up to 1500 rpm or more but wouldn't idle. Place the black probe from the voltmeter on the middle terminal inside the TPS. 995 CHEVY S10 4. ) Intake Manifold Gasket It throws no diagnostic codes other than 12, runs great down the highway, never fails to start on the coldest of days. . and it runs rough. ) Map Sensor 10. When it is doing the surge at idle you can lightly mist some carb cleaner over the throttle body and it runs perfect. Feb 6, 2008 · C4 Tech/Performance - 89 idle surge - Unplug TPS runs steady but fast - Hello All, 89 stock L98 here. The timing is off I know. But when we reconned the tps it acted just like before. Unplugged Throttle Position Sensor and truck runs good, but. I removed the A/C hose running over top of the distributor. 3 RUNS ROUGH ON IDLE. Nov 8, 2009 · 8. Once u hit the gas and get it above idle it start missing and jump in and cutting out. when you put it in gear idle drops really bad and sometimes dies. Then you get a real wiring diagram for it, like the factory manual. TPS unplugged will throw a code and SES light. Decided to do some winter maintenance. Jan 10, 2014 · Reattach the TPS tester. Truck starts and runs, but fault is constant and immediately comes back when cleared. Oct 23, 2007 · Then, it sputters, spits and coughs, and will only stay running if I pump the gas pedal. Checked firing order Fuel Filter Gas dryer (the truck did sit for a year) MAP sensor (Delco) EGR valve (Delco) and solenoid IAC valve (Delco) TPS (Delco) Various vacuum lines Oct 7, 2018 · Until you verify the pressure don't assume that it is not a fueling issue. If the vehicle runs better without the sensor unplugged it most likely means that the sensor is faulty. when i start it the idle drops down and sometimes dies. See full list on cartipsdaily. the 10-30-16 03:20 PM - Post# 2659144 In response to go_hercules If you unplug the sensor, it will set a trouble, and no longer monitor that sensor. Bon Jan 10, 2025 · Cleaning the throttle position sensor is crucial for optimal engine performance. This is why it can run better or even start. The TPS shares it's 5V positive with the A/C sensor. I do not remember if I tested with an ohm meter. I just had this same problem with my 92 K 1500. loosened the mounting screws unintentionally -- it happens) then minimum air should be adjusted. It will run much better unplugged with the ECM using substitute values then it would if the sensor was giving a false reading of -40 degrees. I unplugged the wires, checked my tps voltage to find it up at 4. The guy I bought it off of installed a trailer brake and a k&n CIA as well, so I cleaned and recharged the air filter cleaned the maf sensor, cleaned the throttle body and blade and put a new tps sensor on, no change. It doesn't feel like its misfiring, even when its acting up, just bogging down. This can lead to several problems affecting the vehicle’s overall performance. Do they correlate? Unplug the TPS, and do the readings. Feb 12, 2023 · Can a Car Start Without Throttle Position Sensor? A car can start without a throttle position sensor, but it will not run properly. At first it seemed like it was in limp mode ,so I changed the TPS , which seemed to cure it . Now you can unplug the coil and module and remove that. It still runs bad. I gave up. It will dramatically affect performance as the motor now only knows engine load (map) and not throttle position. I let it idle for a few minutes and it eventually stalled. Jul 22, 2022 · This is a 5 volt reference circuit. NO CODES AT THIS TIME. Sometimes the TPS engagement to the throttle shaft is loose and can be taken up by wrapping it in electrical tape. Again test it Aug 6, 2011 · No change. Ground is good and measures 40 mili volts. Jan 2, 2012 · I have 3400 motor that dies and wont run when map sensor is unplugged is this normal - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. I am thinking at WOT your getting a bum reading and this upsets computer, but most of its reading are correct. So if it won't start instantly, I unplug the TPS, plug it back in and it starts. 3) Hesitation spots while accelerating. When it's stone cold, it will idle fine for about 15 minutes till it warms up and then stalls. Jun 3, 2015 · I bought a new TPS yesterday and we installed it. Oct 9, 2016 · Q: If I leave the map sensor connected the enine load up and stalls. You could yank both valve covers, let it idle and see if you see any rockers barely moving compared to the rest, if so the cam is history. Sold as an individual part or as part of a throttle position sensor kit, the part’s price tag can vary depending on factors like your vehicle’s details and the product’s brand. Recently, the most recent off all the issues, when I start the truck and I put it in reverse to back out of the driveway, the RPMS will drop out and just before it dies it will catch and run better. Check the line from the MAP sensor to the back of the TBI and be sure it fits snugly. It could be hesitating or stalling, or you notice a decrease in power or fuel economy. Then on the interstate , after about 12 miles ,at 2400 Mar 14, 2013 · I take it that you are saying it runs better with the MAP sensor disconnected. You’ll likely experience a decrease in acceleration and poor fuel efficiency since the ECU relies on the TPS for optimal air-fuel mixture. Aug 16, 2013 · Once its running it runs perfectly at idle. Did you know a bad throttle position sensor (TPS) can cut your Chevrolet Silverado’s fuel efficiency by up to 20%? It’s vital to keep your truck running smoothly, especially if you use it every day. if you occasionally see 0 and occasionally see 0. 2 motor. :devil: Krazy Kajun 95 camaro 383 LTI A4 ,58mm Edelbrock TB,3. As a result, the engine may experience various problems, including idle control issues, poor acceleration, and even stalling. 4% that means either the blade is sticking or the TPS sensor is. Impact on Fuel Injection Without accurate information from the Map Sensor, the Engine Control Unit (ECU) may struggle to control fuel injection, resulting in rough idling or even Feb 24, 2005 · C4 Tech/Performance - ESC module unplugged , runs better ,WHY ? - I have an 87 vette , with a 406ci in it ! About a year ago , it started to have drivability problems . Apr 30, 2022 · Unplugging the throttle position sensor (TPS) can severely impact your engine’s performance. When I removed it I could see it was blown out. Jump to Latest 296 views Oct 9, 2022 · Hi Janie, Unplugging sensors will put the vehicle into a default signal. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Hello, With everything that has already been hopefully ruled out and the fact that it happens when warm leads me to believe that the problem is likely an inaccurate oxygen sensor. Check your EGR, Disconnect the vacuum line and plug it. When you unplug the map sensor it runs ok but smells rich. Loosen the hold down bolt ( 14 or 15 mm wrench ). You take a look under the hood and decide to unplug the MAP sensor – and suddenly your car seems to run better than ever before. Started checking connections and found that by unplugging the MAP sensor it would bring the idle up to about 1000 rpm and run great, unless you tried to drive it then the motor would load up and want to die. When I was told that it should fall back to the map sensor and stay running? I have bought new o2 sensor for it and tps and ignition control module. Also mark the position of the distributor itself. IIRC the TPS works via different voltage reading at giving throttle positions. Dec 14, 2015 · If I unplug maf the idle will clear up but still back fire while applying gas. When you unplug the TPS it no longer has any valid data from it, so you can't expect it to run right. TPS runs full range. 3 is the ecm coolant temp sensor. 73gears,Descreened MAF, Trans go shift kit,4000 stall,b&m cooler,K&Ncai,Tune from Trifecta Performance , LT Headers Dec 3, 2013 · I need some fresh ideas, my main salt truck is a 91 Chevy 3500 1 ton 2wd with a 5. If the MAP sensor is working correctly, then the TPS has lost signal to the input and needs replaced Oct 8, 2012 · On the engine compartment, I found two bad spark plugs wires, changed with some I have on hand, disconnect coolant temperature sensor and truck started and runs much better. jevyne yokxxa yheoz gxhde qdppv sdxh rmfwv eqxy jhhn wdeykjct