scrappys93talon
10+ Year Contributor
- 80
- 6
- Aug 12, 2012
-
savannah,
Georgia
I have read every thread possible to try and figure this crap out and im left to post my issue
99 gst
2.3 stroker
Built head
Hks 272s
Fic 650's
Mhi e3 16g
Fmic
Ok so i had an issue after i built and installed my 2.3
Did a nasty burnout and ended up with flywheel bolts backed out of the flywheel. Well i thought it was either my bottom end or valve float so i pulled my head and built it with bc springs and ti retainers and newer good valves.
Put the car back togeather and installed a 3inch gm maf and 2.0maft
Here is where the misfire started
As soon as i hooked up the maft the car started missing so i removed it and re installed my 2g maf
And car ran fine or so i thought about 5 miles down the road i got a nasty misfire at cruising speed of 60, so i changed the cam sensor, crank sensor, tps, maf, power transistor and coils, drove down the road and again it started the misfire. Now when i say misfire i mean the car sounds like its running on 3 cylinders. I am stumped on what this can be. Ive tried 3 sets of wires and plugs with the gap at .28 can anyone tell me what the hell is going on, before the flywheel bolts backed out the car ran like a raped ape and pulled hard as hell. Now i will say if im running wide open and slamming gears it doesnt miss a beat but as soon as i back out of the gas and get back into it the misfire will immediately follow.
Any help is deffinetly useful
99 gst
2.3 stroker
Built head
Hks 272s
Fic 650's
Mhi e3 16g
Fmic
Ok so i had an issue after i built and installed my 2.3
Did a nasty burnout and ended up with flywheel bolts backed out of the flywheel. Well i thought it was either my bottom end or valve float so i pulled my head and built it with bc springs and ti retainers and newer good valves.
Put the car back togeather and installed a 3inch gm maf and 2.0maft
Here is where the misfire started
As soon as i hooked up the maft the car started missing so i removed it and re installed my 2g maf
And car ran fine or so i thought about 5 miles down the road i got a nasty misfire at cruising speed of 60, so i changed the cam sensor, crank sensor, tps, maf, power transistor and coils, drove down the road and again it started the misfire. Now when i say misfire i mean the car sounds like its running on 3 cylinders. I am stumped on what this can be. Ive tried 3 sets of wires and plugs with the gap at .28 can anyone tell me what the hell is going on, before the flywheel bolts backed out the car ran like a raped ape and pulled hard as hell. Now i will say if im running wide open and slamming gears it doesnt miss a beat but as soon as i back out of the gas and get back into it the misfire will immediately follow.
Any help is deffinetly useful
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