ccrowe Posted May 8, 2002 Share Posted May 8, 2002 Fot the last few mornings when I start the car it races. I mean really takes off, not your normal cold start fast idle. After having run for an few minutes, or when put in gear it calms down. It does not do this during a warm start. Any thoughts as to what the problem might be? Link to comment Share on other sites More sharing options...
padgett Posted May 8, 2002 Share Posted May 8, 2002 Bad/dirty IAC. Link to comment Share on other sites More sharing options...
bigrog Posted May 8, 2002 Share Posted May 8, 2002 Remove and clean the throttle body. Use brake or carb cleaner, but avoid getting cleaner into the IAC motor. Link to comment Share on other sites More sharing options...
Guest trofeo73 Posted May 9, 2002 Share Posted May 9, 2002 thats funny, because, when I start my car cold in the morning It will almost die, then idle as normal. It has had a rough idle lately......Perhaps it is a similar problem...any thoughts????? Link to comment Share on other sites More sharing options...
Rattaboy Posted May 9, 2002 Share Posted May 9, 2002 Trofeo, That was the way mine acted as the fuel pump was on its way out. Link to comment Share on other sites More sharing options...
Guest EDBS0 Posted May 9, 2002 Share Posted May 9, 2002 All your answers could be as simple as cleaning the throttle plate. This should be the first, least expensive and easiest step to a fix. Link to comment Share on other sites More sharing options...
Guest trofeo73 Posted May 9, 2002 Share Posted May 9, 2002 Yea, that would help. I need to check the fuel pressure too. I am thinking of building another engine to go in soon, hopefully I can bring it back to its old self again Link to comment Share on other sites More sharing options...
Guest Posted May 9, 2002 Share Posted May 9, 2002 rough idle cold sounds like a bad ignition coil it will also give the same symptoms as and bad fuel pressure reg. and make idle speed race to make up for the miss. Link to comment Share on other sites More sharing options...
padgett Posted May 9, 2002 Share Posted May 9, 2002 I don't think so - the ECU has a specific rpm it is trying to reach and gets that information from the crank sensor. <P>Now the "never say never" postulate indicates that a screwed up ignition can do anything however I would look to a vaccuum leak first. Since it heals when warm a sticking throttle plate or sicking/failing IAC could do it. Link to comment Share on other sites More sharing options...
ccrowe Posted May 10, 2002 Author Share Posted May 10, 2002 Problem solved - The vacumn hose had slipped off the IAC. Thanks Guys.<P>Chris Crowe Link to comment Share on other sites More sharing options...
Guest C.F.Massie Posted May 10, 2002 Share Posted May 10, 2002 Hey Chris,<BR>What vacuum line are you talking about? The IAC is an electrical component and only one electrical connector goes to it. I have changed out the IAC on my 89 three times over the years even after cleaning them a number of times. Guess mine just keep failing which is not very common for an IAC. My 89 idles rough and always has, can't seem to track down the problem. Link to comment Share on other sites More sharing options...
Guest trofeo73 Posted May 10, 2002 Share Posted May 10, 2002 i think I am going to do a thurough checking of any vacum leaks while I am changing the moter mount that I never got to..... I cleaned my IAC but to no avail. lately the car has had a bad odor coming from the exhaust too, especially when starting it after it is warm...... Link to comment Share on other sites More sharing options...
ccrowe Posted May 13, 2002 Author Share Posted May 13, 2002 Correction - The vaccumn line I reconnected was on the throtttle body. Chris Link to comment Share on other sites More sharing options...
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