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Q:

why does car idle high when cold on 1995 Pontiac Bonneville

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car starts right up when its cold,but at high idle(3000rpm)until engine warms up,then might not start with warm engine.Replaced ignitor coils,throttle position sensor,mass air flow sensor,and air filter.
(2) Answers
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There could be many reasons that the computer is turning up the idle. It could be as simple as a vacuum leak to bad wiring and more items in between. You probably need to start with a computer scan and then move forward. If you want us to check this out please call 313-562-7022 or schedule an appointment on line at StansGarage.net. I am sure we can diagnose it and give you the answer you need.
Larry
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