tgk Posted November 8, 2003 Report Share Posted November 8, 2003 88GP LE - when weather become cold (Michigan), my car idle speed become at 1200-2000 rpm. Even when it is on the road running, engine doesnt rev down at low speed and I need to brake hard to slow (like 10-25/ 35 mph) or stop, after stopping, approx. 30sec++ then rev down to 700-800 rpm. I have cleaned the throttle body, replaced IAC and partial vacuum tubing... no help. Anyone have similar symptom and have found a remedy for it or suggestions ? Love my 88 Grandprix but hate all these little problems.. Thanks ! Quote Link to comment Share on other sites More sharing options...
joey b Posted November 9, 2003 Report Share Posted November 9, 2003 sounds like an intake manifold gasket. PITA depending on what engine you have. Quote Link to comment Share on other sites More sharing options...
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