Buick Experts, I need you. Reasons for why...1) error code for "fuel air mixture

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Branalista

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off" and...? 1) What could cause fuel air mixture to be wrong? All reasons. MAP Sensor changed recently.

2) Spark plug misfire error code. Changing spark plugs today, but "idle mis" is very very very intermittent, not all of the time, only occassionally. Is that still just a bad plug....or plug wire???
1997 Buick Lesabre
 
Fuel - Air mixture is the most likely problem area for an engine misfire. Check the spark plugs and the wiring between the plugs and distributor. Check spark plug gap. Look for 'wet' spark plugs. If the plug wires are aging or cracking, it might be time to replace them. How many miles do you have on your car? Check for water in your fuel and/or fuel filter bowl. Check for air leaks in the intake manifold or low vacuum readings at idle. Do you have a Fault Code Error Number?
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