C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1992 Misfire

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Old Jun 18, 2012 | 07:33 PM
  #21  
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A stock LT1 should have about 20 inches of vacuum at idle. You either have a leak or your engine has issues producing vacuum.
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Old Jun 19, 2012 | 02:22 AM
  #22  
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Guys I'm going with a bent push rod theory.. tomorrow I'll pull off the covers and rockers and see if I find anything. I do have 1.6RR on OEM push rods and do race frequently. If this doesn't turn up anything I'm giving up and going to let the engine take it's course.. with a move coming up I can't continue to dump money into this and I've already payed about 1/4 the cost of an engine just trying to fix this problem. Thanks everyone for your input and help.
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