Question about Pontiac Bonneville

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I JUST PURCHASED A 98 BONNEVILLE 3 WKS AGO. THE CHECK ENGINE LIGHT WASNT ON. THE FIRST TIME I GOT GAS I USED MARATHONS HIGHEST OCTANE IT WAS 91 OR HIGHER. THE OTHER 5 TIMES I GOT GAS I USED MARATHONS 87. I DIDNT KNO U WASNT SUPPSE TO USE 87 OR GAS WITH ADDICTIVES. I HAVE A 3800 SUPERCHARGED V6 ENGINE. COULD THIS BE WHY MY CHECK ENGINE LIGHT CAME ON? CAN IT BE CORRECTED BY SIMPLY RUNNING OUT THE OLD GAS AND REFUELING WITH 91 OR HIGHER? OR DO I HAVE TO CLEAN THE SYSTEM FIRST? IF SO, WHAT SHOULD I CLEAN IT WITH?

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Should not be a need to clean out.

Be sure that fuel cap is SECURE and tight. This can cause check engine light to come on.

It would be of great help if you could get the code from the check engine light. You will need a code reader, or you could go to AUTOZONE, and they can read it for you.

Please write down the code number and description that they will tell you.

Good luck

Brian

Posted on Jul 19, 2008

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I do not feel that the octane rateing has caused your problem but it is a very slight possabilty. I would recomend going to autozone or any parts store that offers code retieval and get the code before you try to go any further. Let me know the code and the explanation that the computer gives and i can give you a better idea of what to focus on.

James

Posted on Jul 19, 2008

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