LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

misfire issue???

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Old Mar 29, 2005 | 10:42 PM
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Firebird355's Avatar
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Joined: Feb 2003
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From: Clio,MI near Flint
misfire issue???

OK, heres the deal... I was getting water in my oil and traced it back to what seemed to be just a head gasket.... ok got the heads checked and everything they were fine... so I threw it back together last night and this morning... ok thats not my issue..

Before I tore it apart I had developed a misfire problem once the engine warmed up... Ran just fine until the motor was at running temp for a while... I thought it was my plug wires because they were cracked and I noticed it sparking on the strut tower at one point... this is right before i tore it apart..

Ok, so I got it together tonight and decided to take it out for a drive...was acting alright... then it started misfiring again... at part throttle and maybe up to half throttle....but when I pedal it a little then lay into it stops misfiring and just takes off like it should..but it hesitates first..

It has new plugs and wires....The Opti was replaced in the Fall, I bought it used but I know for a fact it only had 3000 ish miles on it when i got it...

Another thing is fuel pump maybe? It did run out of gas on me in the garage a couple weeks ago?

Any ideas?

Sorry for dragging this out, and thanks for any help in advance!
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