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

possible bad opti?

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Old Apr 15, 2019 | 01:18 PM
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Joe Soucy's Avatar
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Default possible bad opti?

I got 383 lt1 with the 280xfi cam. car hasnt been tuned yet but idles like its only ruuning on 6 or 7 cylinders.. has brand new plugs wires all new sensors, new coil and icm.. everything. Opti is about a year old and was fine when i took it off and put it back on. Any ideas? car also has brand new fuel pump and injectors. its getting fuel, spark and has compression. Firing order is also correct.. ive checked it 3 times.

Last edited by Joe Soucy; Apr 15, 2019 at 01:31 PM.
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Old Apr 15, 2019 | 01:47 PM
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Originally Posted by Joe Soucy
I got 383 lt1 with the 280xfi cam. car hasnt been tuned yet but idles like its only ruuning on 6 or 7 cylinders.. has brand new plugs wires all new sensors, new coil and icm.. everything. Opti is about a year old and was fine when i took it off and put it back on. Any ideas? car also has brand new fuel pump and injectors. its getting fuel, spark and has compression. Firing order is also correct.. ive checked it 3 times.
Answered it yourself
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Old Apr 15, 2019 | 01:52 PM
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Originally Posted by transamcustomz
Answered it yourself
what I meant to say was that car was previously tuned but hasn’t been retuned for the new stall, head porting, Intake porting and new valvetrain.
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Old Apr 15, 2019 | 04:27 PM
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Originally Posted by Joe Soucy
what I meant to say was that car was previously tuned but hasn’t been retuned for the new stall, head porting, Intake porting and new valvetrain.
Again, answered you own question. Those items in combination require significant tuning, especially with the introduction of a cam.
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