Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
get me the code..if you have no scanner..auto zone and most parts stores will scan it and give you the codes for free..the code for #7 miss fire is p0307....if this is the case..you may just need to regap the spark plugs.the gap is to be at .060..if the plug gap isn't right it may give this code
it will be p0307..
sense you have had a tune up.....check the compression on the #7 and compare it to the compression on the other cylinders..if that is fine,,again check the plugs,sense this started after the tune up...the other possibility would be a bad poppet injector on the fuel meter body[spider]