1993 Bonneville ssei bogging out ,under hard acceleration,,l - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 05-14-2008, 08:26 PM   #1
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Default 1993 Bonneville ssei bogging out ,under hard acceleration,,l

I have a 1993 bonneville ssei recently baught , and i was expecting some decent to good acceleration out of it , but when i give it a hard shot of gas it accelerates horribley , I have an accelerometer and it took 11.49 seconds on a 0-60 run . when i expected mid to high 7 second 0-60 . under respectfull acceleration it handles fine, do you know what the problem could be , the old owner used blend gas the 89 octane the middle priced gas ,
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Old 05-14-2008, 10:39 PM   #2
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Your engine (supercharged) has a high compression ratio, therefore its important to run premium fuel. Thats one part of your problem.

The other part is that the car is probably due for a thorough tune-up, including cleaning the throttle body. Once you get those things taken care of the car should definitely wake up.
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Old 05-14-2008, 10:55 PM   #3
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Your car REQUIRES premium fuel of 91 octane MINIMUM.

Your car does NOT have a high COMPRESSION ratio, but does have high EFFECTIVE compression when the boost pressures are factored in. You are slowly destroying your motor over time by running sub-91 octane.

When was your last full tuneup? Including plugs and wires? How old is the O2 sensor? How long ago was the TB cleaned?
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Old 05-14-2008, 11:00 PM   #4
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i think he said the previous owner ran the low-mid grade fuel, not that he was running it.
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Old 05-14-2008, 11:10 PM   #5
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We'll need clarification on that considering the way it was written.

And if that'* true, plugs are shot for sure. I'd be curious to see what the plug gaps have eroded to.
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