Could have been a whacked injector-- hyrdo-locked the cyl-- and put a hole in the piston----
Have you checked your rockers on that cyl??? HOPEFULLY-- you just bent a valve.
Good luck there--
Sam
>
> From: Michael Clark <dml@mikesdakota.com>
> Date: 2003/08/20 Wed PM 10:59:31 EDT
> To: dakota-truck@dakota-truck.net
> Subject: DML: Zero Compression!!!
>
>
> 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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