Hi! Bonneville 1993, 3.8 SCh has a prob;ems with a (+) - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-09-2003, 03:11 AM   #1
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Default Hi! Bonneville 1993, 3.8 SCh has a prob;ems with a (+)

full trottle. Simpthoms are like follows. When slow push - all is ok both at idle and driving. When fast push both idle and driving (kick-down) engine starts shaking till release pedal. All spark plugs, wires, coils, O2 sensor are new. NGK, Tayler, MSD.
PLease advise what can it be.
Last summer I had the problems with fuel pump - when hot fuel pressure gone down after full trottle but now here in Russia the temperatura near 0 degree C.

Thank you in advance

Regards. Vitaly
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Old 04-09-2003, 02:57 PM   #2
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Have you checked the fuel pressure?

By the way - did you fix the supercharger boost problem?
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Old 04-09-2003, 04:33 PM   #3
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you need fuel with octain rating of 92 or higher. Problem solved. Your engine is detonating so fast on piston power stroke that it will not run with the supercharger boosting the kind of PSI that is puts out.

let me know if you can find premium fuel.

Jeff
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Old 04-10-2003, 03:26 AM   #4
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Default I will try today to find the time to measure fuel pressure

As for gasoline - I use always the same station with 92 - theew was no problem with it.

By the way - I did manage to fix the problem with 56 code. Many thanks to all replyed.

It was sharp description of the problem. After I replace the by-pass soledoid - all are ok!

Regards

Vitaly
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Old 04-16-2003, 10:05 PM   #5
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Have you checked your motor mounts and CV joints???
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Old 04-17-2003, 02:42 AM   #6
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Default What does it mean CV joint?

It seems all engine mounts are ok
I do not beleive that power depents on mouts, but may be I believe wrong.
Rgds
Vitaly
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