look for vacuum leaks especially at the pcv valve.

does it rev up good in spark??

did you do a back pressure test on the exhaust for the cat??

Roy

Answered by ASEMaster6371 (expert)
24,854 answers provided

Thank you Roy for the input. The answer was found in the engine timing.Toms Performance in Vancouver WA. put the timing belt in with two of the cams in the wrong position. I needed a professional to fix this, in case there was more damage as a result, and We have to go to court. Marcelo's Auto repair in Toledo, WA. knew right away what was wrong. Evidently it happens frequently. However Toms performance wouldn`t fix it and told me that Marcelo was full of it.I paid $3900for Tom to build this engine. I may take him to small claims court, to reimburse me in the amount of $530 for Marcelo`s services. There is a revision that says two cams up,and two cams down on this GM motor. Now she runs beautifully.YA-HEW.

Response from loui2sox
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