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Idle rpm increases when brakes are applied - GMC Cars & Trucks

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

mudman4300
  • 33 Answers

SOURCE: Triton V10 Engine Shudders under load

have your fuel system vacuumed out our excursion did it as well the injectors are not at fault it is the fuel lines

Posted on Aug 07, 2008

  • 99 Answers

SOURCE: very high idle

probably is brake booster if you can hear hissing sound, would not advise disconnecting hose, would be extremely hard to stop the vehicle, a dangerous situation. also check for vaccum leaks on intake manifold. follow brake booster hose to engine and check for leak from there

Posted on Nov 30, 2008

pkthoege
  • 93 Answers

SOURCE: 94 honda civic idleing problem

This is a bad throttle position sensor

Posted on Dec 16, 2008

  • 1596 Answers

SOURCE: Dash lights go dim when braking and just odd times driving

Possibly have the Wrong Amp Rating Alternator
Also Check all Grounds under Hood And Engine to BODY GROUND

Posted on Jan 13, 2009

john631068
  • 172 Answers

SOURCE: idle problem when brakes applied

Sounds like you have a vacume leak on your brake booster ....with engine running have someone press the brake while you listen on the driver side by the master cylinder the large vacume line going to the booster behind the master cylinder is most likely the vacume leak...and if so you can get what you need at your local parts store ...

Posted on Nov 20, 2009

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1 Answer

I just bought a 2010 buick enclave cxl and on slight incline in drive will roll back. ? Its like the rpms arent where they should be. I don't think the weight should pull it back so much. Thanks


The parking brake is the way to stop it rolling back. Idle RPM are set and have no bearing on how the car rolls back. apart from if you increase the revs, the car will move. The proper procedure on an incline is to apply the parking brake, put the vehicle into drive, increase the revs and take off the parking brake. Just like we did in the old days when we had manual gearboxes :>)

May 24, 2016 | Buick Cars & Trucks

1 Answer

My car run good but idle problems n stop running on because rpm go to low when engage ,on stop or red light but reward wright away what should I check? Thx


test the brake booster by idling the engine with out the foot brake applied then apply the brake
if the fault appears with the brake applied ,replace the brake booster.

Aug 30, 2015 | Jaguar XJ6 Cars & Trucks

1 Answer

2001 kia sportage will brake lit switch cau the truck stall whil driving


Yes, If your idle RPM is too low it can kill the engine due to the high current of the brake lights will cause a stall.

Most cars use an RPM idle of 750 to 775 RPM. Check your manual then increase your idle a little.
Hope this helps.

Mar 23, 2015 | 2001 Kia Sportage

3 Answers

Oil light comes on when braking


Your oil pump is failing.... when your engine rpm drops (when stopping) the pump and engine rpm drop to idle..(light comes on). when you accelerate (rpm's increase) the pumps start working harder and the light goes off.... I am TRULY surprised the dealer(who did you see at the dealer???) did not know this,... THIS IS BASIC STUFF!! ... I mean 090 level mechanics...

Get the oil pump replaced immediately!!!!

Jun 06, 2017 | Cars & Trucks

1 Answer

I have a 1996 F150 4x4 with a 5 liter/302 engine, manual tramsmission. When I push the clutch in to shift the engine races and the tach goes up then after a few minutes it will idle down. I have replaced...


Check the PCV valve and the PCV hose where the elbow is near the TB. It may be stuck open and the hose may have a crack, Squeeze it while engine is running. Also are you sure its not brake related. The check valve on the booster can fail. Does the RPM change when you apply just the brake ??
Also spray some brake cleaner around the base of the TB looking for a RPM increase. Spray around any vacuum source.

Apr 14, 2010 | 1996 Ford F150 Regular Cab

2 Answers

Engine increases rpm when brake pedal is depressed


Inspect brake booster vacuum line from engine intake to brake booster for leaks also inspect brake booster check valve, more than likely your brake booster is causing a vacuum leak to your Intake thus leaning mixture wich increases idle rpm

Apr 03, 2010 | 1990 Toyota Pickup

2 Answers

2000 ford tarus wont idle v6


apply a light force to the gas pedal and start the car continuing to regulate the rpms with gas pedal if you can make the car idle with the gas pedal then you will probably need a new idle air control valve

Dec 10, 2009 | 2000 Ford Taurus

1 Answer

Idle problem when brakes applied


Sounds like you have a vacume leak on your brake booster ....with engine running have someone press the brake while you listen on the driver side by the master cylinder the large vacume line going to the booster behind the master cylinder is most likely the vacume leak...and if so you can get what you need at your local parts store ...

Nov 20, 2009 | 2004 GMC Sierra 1500 Crew Cab

2 Answers

INCREASED ENGINE RPM'S ON MY 99 CADILLAC DEVILLE


throttle position sensor. or idle control sensor

Feb 12, 2009 | 1997 Cadillac DeVille

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