Question about 1991 GMC S-15 Jimmy
Hi i need help. I took my intake off because gasket was leaking anti freeze. I repair the gasket put every thing back on.its not running right. I didn't mark the position of distributor so i bunt motor over till number one up and turn crank til mark on balance line up on 0 degrees put distributor in. start it not good the i read you have to unhook a wire from under dash then set timing. I did still not running right. i took egr vavle off it working i took iac off it had build up on it. So i took tbi off and clean it without taking complete a part. Put it back on it still not right it has a miss and seems to be runnin rich and it has a spark nock . and i time it with a timing light. Can you help. Todd
Check to make sure you have the firing order correct. If so, go ahead and remove each wire to isolate the misfiring cylinder. From what I can understand from your post, it seems that so far, you have done everything correctly. Did it run well before you did the gasket? Running rich can be a product of a vacuum leak as well. To find it, spray some carb cleaner around perimeter of manifold, and near any vacuum source. If idle changes, that's where the leak is! If its leaking from the new gasket, you might consider, loosening up the bolts and re-tightening them in a cross pattern, side to side, beginning at the center, working towards both ends. split the torque value and tighten twice: if value is 30lbs, do once at 15, the second time @20. I hope this helps.
Posted on Jan 02, 2009
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Posted on Jan 02, 2017
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