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Could be your MAP sensor or Absolute Manifold Pressure sensor same thing usually mounted on or near the firewall and has at least two hoses"vacuum" going into it.
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What will cause a car to stall in a 1998 Chevy Malibu?
Stalling at idle? Immediately after starting? While driving? While stopping? Cold or hot engine? What engine do you have?
What would cause an engine to shake at idle and while driving?
It might be a broken motor mount or transmission mount.
Why does idle down while driving at 65 mph?
More than likely the transmission has gone into overdrive.
Mazda 626 throttles up and down at an idle and while driving?
throttle postioning sensor is bad
What makes a car idle up and down it also cut off while driving?
A vacuum leak could cause that. The year, make and engine info would help us help you.
On a 1994 Buick Lasabre Why does the engine continue to rev up while driving even when brake is applied?
On a 1994 Buick LaSabre why does the engine continue to rev up while driving even when the brake is applied ? or when driving why doesn't the engine return to idle when the brake is applied? I would check for a vacuum leak
Why does 350 idles good but cuts out runs rough while driving or under load?
A 350 engine will idle good but cut out and run rough while driving if there is a vacuum leak. This causes too much air to enter the engine under load.
What are symptoms of a bad throttle control sensor?
Your check engine light will be on and you will feel bucking or jerking while you are accelerating. You will also have an idle surging, sudden stalling of the engine, and a sudden surge in speed while driving on the highway.
Why does your 91 Ford Bronco 5.8L idle high It will be OK then after driving the idle will stick Sometimes it will kick down but sticks again after driving?
Idle Air Control Motor malfunctioning.
Why does your 2001 Montana temp gauge go up at idle but stay down while driving?
There are several reasons for this behavior in virtually all water-cooled vehicles...Less air passes through the radiator while sitting at idle.Ambient engine heat is trapped under the hood with no fresh air to force it out.Mechanical water pumps pump slower at idle.
Why does the air condition on a 1991 silverado cool more at idle than while driving?
When the car is at idle, the air conditioner works just as hard as when the car is moving. When the car moves, the engine gets very hot. so the air conditioning works better when your at idle because it doesn't have to cool the heat from the engine.
What does a Idle speed control solenoid do?
The idle speed control solenoid controls the idle of the engine when the air conditioning is engaged. Since the ac pump draws down the engine idle the solenoid increase the idle when the ac is on.
