usually caused by throttle position sensor, also can be caused by either low fuel pressure, fuel injectors must have specific pressure to properly operate at running idle, this can also be caused by clogged fuel filter.
What causes a car to idle good and run rough when you give it gas?
Vacuum leek
i think it causes bad/rough idle
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MAF senso, or transmission fluid.
You broke it. Way to go.
Idle RPM is set automatically by the computer. if you have slow or rough idle try fuel injector cleaner, then new air filter, new plugs or plug wires (try them in that order)
check dist. cap for water
Depending on the severity,yes,it will may run rough or idle hard
There are several things that can cause your 2004 Chevrolet Trailblazer to idle rough. The most common causes are a dirty fuel filter or a dirty air filter.
There are several things that can cause your 2002 Kia to idle rough. The most common cause will be bad spark plugs or a bad spark plug wire.
injectors are a common problem