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97 Chevy Monte Carlo 3.1 134000
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jaghe931
New User
Oct 19, 2011, 3:40 PM
Post #1 of 2
(1243 views)
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97 Chevy Monte Carlo 3.1 134000
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Car had rough idle at stops. Now when starting idles low and after giving gas starts to idle high. Continues to idle high at low speeds and at higher speeds seems fine but when put in park idles at 4000 and is very loud.
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 19, 2011, 3:45 PM
Post #2 of 2
(1236 views)
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Re: 97 Chevy Monte Carlo 3.1 134000
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There was an answer posted for you on the other site but they are having server problems so you couldn't see it.
Since it is reacting to movement of the throttle plate, that would indicate it's not seating properly. You could have a worn out throttle body but do this first.
You may have a bad IAC ( idle air control) but try eliminating any vacuum leaks and cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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