LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Miss when in high RPMs

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Old 09-27-2009, 08:37 PM
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Default Miss when in high RPMs

Went to the track in may and my best time was a 13.8 with a very poor reaction time (first time) went again last weekend and a little bit better reaction time but i'm running a 15.2! Noticed when at WOT and the RPMs reach about a little over 4 grand it misses about 3 times then goes though and into the next gear. Any ideas? mods are in SIG
Old 09-27-2009, 09:02 PM
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i had the same problem, but i have a m6. i was sitting a a stop light for 3-5 min and then i went, WOT 1st - 2nd and it missed and shot out black smoke. i have talked to some people and they said that it could be a freak thing, or one c is getting more gas that it doesnt burn off, than the others. but idk if thats right
Old 09-27-2009, 09:07 PM
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yes, my friend behind me said i was pouring out black smoke when at WOT
Old 09-27-2009, 09:24 PM
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Black smoke is caused by too much fuel. Too much fuel could be because of not enough spark to burn it, an exhaust leak in or around the O2 sensor or on the Y-pipe or Exhaust manifold. Opti, or a cracked plug or bad wire, not clipped in or a simple vacumm leak or a simple tune up. Check engine light will do it too. but its prob opti or vacumm leak or exhaust leak. Check everything i just told you.
Old 09-28-2009, 06:34 PM
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I have a bad EGR could that be the problem? maybe it is the Hypertech Programmer tune? i just got it about a month ago, and before that i never had a problem with it.
Old 09-28-2009, 06:45 PM
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Just a side note, reaction time means nothing when your just running for ET. Time starts when your tires cross the line.




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