TPI 3000-4500 RPM misfire
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TPI 3000-4500 RPM misfire
Can anyone help me out? i have a 84 Z28 that i installed a stock 305 and TPI with MAF off of an 87 IROC. I have replaced everthing in my ignition system and still i have a missfire around 3000-4500 RPM. The engine runs well till then ,, but as soon as i hit around 3000 RPM the tach starts jumping around and the engine surges and backfires throught the exhaust. When i unplug the timing conector from the computer it seems to run better. Does anyone have any sugestions? THANKS!!!!
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Joined: Aug 1999
Posts: 2,441
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From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Re: TPI 3000-4500 RPM misfire
* check your timing, should be 6deg with timing connector (EST) disconnected.
* check your dizzy/ignition module
* check your dizzy/ignition module
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Junior Member
Joined: Dec 2007
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Re: TPI 3000-4500 RPM misfire
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iTrader: (28)
Joined: Jul 2006
Posts: 1,564
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From: ocklawaha FL.
Car: 81z-28,89gta,91z-28 03 1500
Engine: 355,L98vette tpi,327
Transmission: TH350/700R4/700r4/4l80E
Axle/Gears: 3;73/3;27/2;73/3;73
Re: TPI 3000-4500 RPM misfire
CONGRATS!!
Glad to hear your in good shape now.
BTW, welcome to TGO! I absolutely LOVE this place.
Glad to hear your in good shape now.
BTW, welcome to TGO! I absolutely LOVE this place.
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