Rough Idle

warmbrus

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HELP NEEDED BAD! First I want to say you procedures are very well done and simple.

My daughter has a 95 GP (pre OBD2) and I did head gasket and LIM gaskets. The motor started right up, but did have a very slight surge/roughness at idle, but with 178K miles, I assume it very good.

After a couple day of running fine, now it won't idle. It has a dead spot when accelerating, but will stay running if keep rpms above 2K. There does appear to be some misfire, but not sure about any backfire.

During the head job, I installed new plugs and wires. I also cleaned small amount of carbon out of throttle body and port going to EGR. The EGR valve was clean and I checked the 3 solenoid plungers and all were free and seated in off position. I clean IAC motor, but it wasn't really dirty. I also tested the MAP and voltage went up and down with me sucking on a straw. I have wiggled all wires on the ignition module and most all sensors and nothing changes

Not sure what to do. I would really appreciate any comments. Thanks.
 
Have you checked for a vacuum leak? Do you have a check engine light on?
 
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