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Your car may fluctuate in idle while applying the brakes due to a problem in the computer. Everything in cars nowadays is regulated by the ECM(Electronic Control Module). A few simple diagnostics tests done by a certified tech can tell you what exactly the problem is. You may also have a bad power brake vacuum booster, this would effect the engine idle when the brakes are applied.
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∙ 13y ago
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If you drive through water your brakes may become slippery and ineffective to dry the brakes off?
apply your brakes gently while accelerating at the same time
Why would engine idle speed fluctuate?
More times than not, it turns out to be the TPS sensor
Why will the idle fluctuate on a 1993 buick lesabre it goes between 1500 and 3000?
I HAVE THE SAME VEHICLE AND HAD THE SAME PROBLEM... THERE IS A SERVICE BULLETIN FOR THE IDLE AIR CONTROL VALVE. THAT SOLVED MY INTERMITANT HIGH IDLE.
Can a crank sensor cause the engine idle to fluctuate on a 2004 Dodge Ram 1500 4.7L?
possibly
Why does your car 2001 civic shake or idle roughly as you apply brakes and approach a stop and then recover to normal a few seconds after stopped and sometimes seems worse when turning and stopping?
Check for a vacuum leak
Car pull to the right when brakes are apply?
Time for new brakes or adjustment.
Why does my 1995 Oldsmobile achieva brakes grab when you apply the brakes and the car shimmies?
it broke
What causes a 1992 Saturn SL with a manual transmission to stall when you hold the brakes?
I would say a vacumn leak. Check hoses, measure vacumn with running at idle and at idle when brakes applied. This assumes you have power brakes and it idles well without the brakes applied. Please make sure that the clutch is working properly... Does your clutch work properly?
If you drive through water, your brakes may become slippery and ineffective To dry the brakes off?
apply your brakes gently as you accelerate
If you drive through water your brakes may become slippery and ineffective. To dry the brakes off .?
apply your brakes gently as you accelerate
What does stabbing mean?
What is stab braking?Apply your brakes all the way.Release brakes when wheels lock up.As soon as the wheels start rolling, apply the brakes fully again. (It can take up to one secondfor the wheels to start rolling after you release the brakes. If you re-apply the brakes before thewheels start rolling, the vehicle won't straighten out.)This is directly from the NYS CDL Manual.
Idle rough when brakes are applied?
The power brake vacuum booster is probably failing.
