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Have you checked the timing? It could be that or something else wrong with the ignition system.

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Q: How do you fix a 1991 Pontiac grand prix 3.1 from dieseling and will not accelerate?
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How do you replace starter on 2.3cy 1991 Pontiac grand am?

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In a 1991 Pontiac Grand Am : According to my Chilton's Auto Repair Manual : ( 13.6 U.S. gallons )


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=== === === ===


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Where is the ignition coil located on a 1991 Pontiac Grand Prix?

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Does 1991 Pontiac Grand Prix have airbags?

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