Ok, so a few days ago I'm cruising at 90 and I lean on
the gas a bit, not enough to downshift but crowding it
fairly hard. All of a sudden it hesitates and
backfires through the exhaust. So I let off, take my
exit and come to a stop. After that I had a bad miss
in the engine. Yesterday I did a tune up, new
cap/rotor, plugs, even pulled the valve covers and
checked for misaligned or loose rockers, all looked
fine. By this point the miss had turned in to a
miss/popping sound coming from the exhaust. Like a
backfire but nowhere near as loud or sharp. So this
evening I put my compression guage on it and found
that number 7 has absolutely ZERO compression! The
plug was also very black after only 30 miles. I put in
some oil in that cylinder but compression remained at
0 on the guage so I think the rings are fine. My oil
looks nice and clean so I don't think it's a cracked
head. I'm thinking it's a burnt or bent valve (leaning
towards burnt). Does this make sense to you guys?
Could this be what was causing my code 52 (mixture too
rich)?
--Mike
www.mikesdakota.com
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