tdvs Posted October 18, 2009 Report Share Posted October 18, 2009 My '95 3.4 CS sat at work all last week. When I tried starting it yesterday morning it fired right off, but raced to 3000 for a second or two then dropped to 1000 and chugged then back to 3000 and back to 1000 then quit running. On the third try I tried to give it a little gas when it dropped to 1000 and chugged but it raced to 3000 again so I put it in gear and it ran and smoothed out. It was fine starting and running the rest of the day. It had rained a couple times during the week, and rained earlier yesterday morning, but wasn't when I was tring to start it. No warning lights came on during the process. Excessive moisture/condensation maybe? Quote Link to comment Share on other sites More sharing options...
Mach 5 Posted October 18, 2009 Report Share Posted October 18, 2009 maybe you got a vacuum leak somewhere or a sticking IAC valve Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted October 21, 2009 Report Share Posted October 21, 2009 I would lean toward the IAC being gummed up. Quote Link to comment Share on other sites More sharing options...
jeremy Posted October 25, 2009 Report Share Posted October 25, 2009 bad cat can cause this issue too, right? Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted October 25, 2009 Report Share Posted October 25, 2009 bad cat can cause this issue too, right? Â it would have to be VERY plugged, but it is possible. Quote Link to comment Share on other sites More sharing options...
1990lumina Posted October 25, 2009 Report Share Posted October 25, 2009 I would say IAC is fucked. My Lumina did this when the IAC spring snapped off and the pintle valve would spin i and out super fast. Quote Link to comment Share on other sites More sharing options...
spiderw31 Posted October 25, 2009 Report Share Posted October 25, 2009 I agree with everyone who said IAC. Thats what it sounds like to me. Quote Link to comment Share on other sites More sharing options...
ManicMechanic Posted October 25, 2009 Report Share Posted October 25, 2009 When mine did that, it was LIM gaskets. Quote Link to comment Share on other sites More sharing options...
94 olds vert Posted October 25, 2009 Report Share Posted October 25, 2009 bad cat can cause this issue too, right? Â it would have to be VERY plugged, but it is possible. Â that is why I cut my cat off. Quote Link to comment Share on other sites More sharing options...
ShockTherapy Posted October 27, 2009 Report Share Posted October 27, 2009 that's what my LQ1 did when i puked up LIMG's Quote Link to comment Share on other sites More sharing options...
swift13 Posted October 29, 2009 Report Share Posted October 29, 2009 i posted this problem when i first signed on to this forum and still got no solid answer my cat is gone iac has been changed timing has been changed, pump and injectors, fuel filter, tps, coils, plugs and wires, my last guess is the computer, even though the last few times i started it it ran fine but i wasnt driving just starting it up before i garaged it. Quote Link to comment Share on other sites More sharing options...
SigEpCutlass Posted October 30, 2009 Report Share Posted October 30, 2009 Try doing an idle re-learn and see if that changes anything. http://www.w-body.com/forum/index.php?topic=31176.0 Quote Link to comment Share on other sites More sharing options...
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