A rough idle and lack of power in a 1994 Mercury Tracer when hot could be caused by several issues. Common culprits include a failing ignition system (such as spark plugs or ignition coils), a clogged fuel filter, or a malfunctioning fuel pump. Additionally, a dirty or faulty mass air flow sensor (MAF) or a vacuum leak could disrupt the air-fuel mixture, leading to poor engine performance. It's advisable to run diagnostic tests to pinpoint the exact issue.
There is none. It is electronic. Try replacing the idle motor.
700 \rpms
check fuse 22
Most likely a bad idle control (also called IAC or ISC). Otherwise, it it also seems to run rough, consider the possibility that it might be overdue for a tune-up.
Rough idle lacks power
it is the large screw with a temperature check pod on it right above the throttle spring
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 pcv hose elbow for vacuum leak.
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The power brake vacuum booster is probably failing.
Why does my 2001 kia sportage idle rough?
rough idle smell gas