I have a 1996 buick, park avenue ultra, 3.8L V6 superchared I have a problem...

C

Charles

New member
...please help me.? When the car is idling it missfires at cylender 4, at least that is what me OBD2 reader say's. I have all ready replaced the fallowing: spark plugs, spark plug wire's and the ignition coil. and I did an compression test. cylinder 4 is about 50 psi lower then the rest of the cylinder's. does that mean that I have a blown head gasket, or .blown valve, what is the most likly problem. the starts an run pritty good, exceped when it's missfiring. and when I punch the gas the doesent do anythime. it's only when I give it alot of gas
 
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