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chevy s10: miss firing..new plugs,sp wires, rotor and dist cap

Resolved Question:

chevy s10 4.3 engine. Origional problem #3 miss firing. changed, new plugs,sp wires, rotor and dist cap. Same origional problem persists.

Submitted: 1 year ago.
Category: Chevy
Expert:  zzdaryl replied 1 year ago.

I would check the compression on a few cylinders to see if they are all about the same as 3, if they are all close the problem is most likely a injection problem so you might try a professional injection cleaning (special equipment is required) but if that does not help the injection system may need replacing, I would also be sure there is good fuel pressure before doing anything

zzdaryl, Chevy Technician
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