I have had my 216 head gasket replaced 4 months ago along with a new head
and a valve job. I was told to get a tune-up after the job - I have not
done that. Since that time I am experiencing backfiring under the hood.
Never out of the tailpipe. I have replaced all of the plugs, plug wires,
rotor and cap. Also have a new fuel pump and fan belt. Still getting the
backfire. It happens most often after I start the cold truck and once in a
great while when I am driving. Also, when I step on the gas it will pause
for a second or so then it seems to kick in. I have tested going with a
high test 94 octane with no change.
Do I need a tune-up? What is involved? I have VERY limited knowledge of
what I am doing. If I took it somewhere what would I expect to pay for and
what should I ask to be completed?
46 Chevy 3104
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