how to access trouble code with a paper clip

1991 BUICK CENTURY
176,000 MILES
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RALPHKITCHEN
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  • 1 POST
Today wife is driving out of state and the check engine light is coming on climbing some hills goes out when going down.

Last week I noticed a stumble when cresting hills at the point when the throttle was backed out of.

Several weeks ago the fuel pump was replaced six spark plugs were replaced after the engine died and no check engine light. I also have run Sea Foam through on each of the last 3 tanks of fuel this seemed to take care of the stumble at hill crests.

Today the air filter was replaced.
Aug 13, 2012 at 4:32 AM
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