Question about Chevrolet C2500

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Tps sensor truck idles up and down after it gets warm when you stop and hold the brake. could it be the tps sensor ?

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  • Chevrolet Master
  • 4,821 Answers

Chec idle contol motor 1st-may be worn or dirty--to be certain do a scan or data stream with pro gear from a shop-not a dealer--u dont want to replace parts by guessin-----getta haynes manual for repair details

Posted on Jul 27, 2013

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 14 Answers

SOURCE: 1992 gmc chevy 350 wont idle when warm

This could be a number of things but i think that your problem sounds like a vacuum leak or an EGR problem. Try listening for leaks and try un-plugging the EGR solenoid valve one time.

Posted on Apr 17, 2009

  • 1 Answer

SOURCE: 89 Toyota pickup erratic idle when warmed up

I had the same problem and found the idle screw was hitting a small shock absorber that had worn out and wasn't allowing the rocker arm to release all the way. Now i just need to find a replacement part for this 20 yr old truck, right.

Posted on Apr 23, 2009

Molson02536
  • 3854 Answers

SOURCE: Idles rough and is hard to start apears to run better after it warms up. Have replaced the ICO, TPS, and the map sensors with no effect.

You can clean the EGR. No promise it will work. I have an idle problem on my `97 Grand Am Se. Shop told me I could clean it and it might solve my problem. 
Just remove the EGR with the 2 bolts from the top of the manifold behind the throttle body if you have a 3.4 v6 like I do. Then leave it upside down with throttle body cleaner in it. Fill the EGR level with cleaner and let it soak for at least 30 min or more. Then reinstall. 
This will remove any carbon on the inside which plugs the needle from pushing out at highway speeds. Hope this helps. If the problem returns in a week or so then replace with new EGR. New EGR is about $100-200! Cleaning seems to have helped my car did that about 3 weeks ago.
If you have a service engine light on turn the key to the run position on the ignition, pull the fuse to the ECM (batt) and disconnect the wire harness to the EGR. Reinstall it after a 1 min, That will clear all the codes in the ECM and reset everything.
Once you place the ECM fuse back in, start the car. It may stall but let it, DO NOT TOUCH ANY THING. The ECM need to relearn the EGR and engine from all it's sensors like the first time it was started. Just start it up again and it should be like the day it came off the assembly line and will relearn everything.
Good luck and just drive it like you always. If you decide to change the EGR valve, you still need to clear the ECM as mentioned above for the ECM to relearn the new EGR valve. Hope this helps and keep me posted.

Posted on May 25, 2009

  • 850 Answers

SOURCE: i have a 94 toyota truck 2wd. it has 88k on a

definately the diaghram in the brake booster!
get it fixed asap very dangerous!
Google re forums for hot bits

Posted on Jul 17, 2009

  • 6982 Answers

SOURCE: Car shuts off when I stop

Try cleaning the two cross wires inside the mass air flow sensor. (use Q-tip and carb cleaner) It is also possible that your oil pressure switch has a low pressure cutoff feature. If the pressure is low at normal idle, it will shut the engine down. Check oil pressure with a mechanical gauge and if it's good change the sending unit. (check to see if voltage flow through switch stops just at shutdown first though)

Posted on Oct 13, 2009

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1990 2.4 toyota pick up idles up and down


can be the automatic idle check that its okay

Jan 31, 2013 | Toyota Cars & Trucks

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1994 chevy c 1500 shuts off everytime i stop


Possible TPS (Throttle Position Sensor) issue. The TPS controls idling speeds under all conditions. Although the truck may idle fine when cold, once warm, if you are encountering sputtering or stalling, the TPS could be the culprit. Other possibilities could be fouled spark plugs,bad wires, or a bad distributor cap.

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I have a 1989 ford bronco with a 302 that ideals up and down and dies out when park in red light


A number of things could be the problem here:
  1. Bad plugs - fouled plugs would cause erratic idling
  2. Bad wires - also would cause erratic idling
  3. Bad or worn distributor cap
  4. Bad MAF (Mass Air Flow) sensor
  5. Bad TPS (Throttle Position Sensor - this controls the idling speed under all conditions. A bad TPS would idle fine under certain conditions ie engine cold, engine warm with AC on etc but could be bad when truck is warm and at a stop.

Oct 10, 2011 | 1989 Ford Bronco

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Car barely holds an idle and sometimes stalls when coming to a stop


There could be several causes for your stalling problem.
  • Bad plugs
  • Bad wires
  • Clogged fuel injectors
  • Bad MAF (Mass Air Flow) sensor
  • Bad TPS (Throttle Position Sensor)
A basic tuneup would rule out the plugs and wires. Fuel injector cleaner will clear most clogged injectors. Once ruled out (or if the car is running smooth apart from stalling at a stop) the most common problems are MAF and TPS.
The TPS in particular regulates idling speed under all conditions. Included in this would be while the engine is warm. If your car wants to stall unless your foot is on the gas, I'd lean toward the TPS.

Oct 05, 2011 | 2006 Ford Focus

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How do i stop the egine from idleing when it warm up ?


When your vehicle is warm and it idles like it is cold, you have a faulty TPS-throttle position sensor, and it needs to be replaced. The TPS sensor is located on the throttle body, has a plugin and is usually held on by 2 screws.

Apr 01, 2011 | 1990 Honda Accord

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After driving and warming up the engine it hesitates after you come to a stop. engine idles fine but push the accellerator and it take a few to sec. to go. 2004 murano


You may want to look into your MAF (mass air flow) sensor. Or it also sounds like a TPS (throttle position sensor). Both can cause the same thing. If you put your A/C on full blast while in drive and you foot on the brake you may have a TPS problem. Hope this helps and please rate me.

Sep 24, 2010 | Nissan Murano Cars & Trucks

1 Answer

Car shuts off when I stop


Try cleaning the two cross wires inside the mass air flow sensor. (use Q-tip and carb cleaner) It is also possible that your oil pressure switch has a low pressure cutoff feature. If the pressure is low at normal idle, it will shut the engine down. Check oil pressure with a mechanical gauge and if it's good change the sending unit. (check to see if voltage flow through switch stops just at shutdown first though)

Oct 13, 2009 | Chevrolet Corsica Cars & Trucks

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94 eldorado stalls


First impression is a MAP sensor. If you take the car to a service station or an auto parts store that features free diagnostic tests, I'm sure the MAP sensor fault will appear. Other cause could be the TPS which controls the idle at cold,warm, and AC operation settings. It's possible that you're stalling due to insufficient idle speed setting on the TPS.

Jun 30, 2009 | 1994 Cadillac Eldorado

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Honda civic hatchback idles really high


The person that told u that it was the tps and idle air they we're completely right!! The tps sensor is what makes it do that. If you pull the air intake of there's 2 holes on the throttle body. Plug one of the off with your finger while the engine is idling high and it should come down mine was the top hole. If it does go down just get a new tps sensor. and the back sensor on the intake to be safe. or the ghetto way is to plug the hole off, not my sugestion.

Jan 26, 2009 | 1993 Honda Civic 4 Door

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Buick Regal 3.8 dies while braking


Check to see if you have a lot of dirt in the throttle body. Clean the throttle blades out with brake cleaner or throttle body cleaner. You'll see alot of dirt come out. Keep spraying until it comes out fairly clear and wipe the throttle body out with a rag. If this doesn't do it, you may have a problem with the throttle position sensor (TPS). This sensor controls the idle after the car warms up and keeps it from dying when you brake or sit at idle.

Sep 07, 2008 | 1993 Buick Regal

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