Question about 1992 Pontiac Bonneville

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Using alots of gas 1992 bonneville 3.8

Plugs and wires are new 105,000 on this car gone from 33mpg to 15mpg what do you think THANKS

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  • twodogs666 May 11, 2010

    Do you have a engine light on? Possibly just a crook O2 sensor.

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U can try changing the fuel filter. May want to try a complete fuel system cleaning also.

Posted on May 18, 2009

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1 Answer

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1 Answer

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1 Answer

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1 Answer

Need to see diagrams of the figs. 3-6 from a Chilton's manual...


My son came down and figured it out for me. Not sure what all he did but he had to make a few modifications by splicing the wires together after cutting the wires just under the dimmer switch...then a few adjustments were needed to get it to all work right.
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