Dead cylinder!
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Freshman User
Joined: Sep 2004
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Dead cylinder!
Monday afternoon my truck started idling rough whenever I'd come to a stop. It would smooth out whenever I accelerated, but it would get rough again every time I'd come to a stop. i figured it was crappy gas, so I put some Shell V-power in it. Nothing improved, and by the time I got home from work, my engine light was on.
I had a business meeting about 100 miles away from home Tuesday afternoon, so I took it to the nearest dealer first thing Tuesday morning. I figured it was something minor, and that they would just reflash the computer or tweak something. 2 hours later they called me in and told me the #4 cylinder had ZERO compression. I managed to get the dealer to issue me a loaner even though I didn't buy my truck there.
This afternoon I received a call that my truck is ready! I'll report back on what the specific cause was, but I'm speculating it was a stuck valve or soemthing.
I had a business meeting about 100 miles away from home Tuesday afternoon, so I took it to the nearest dealer first thing Tuesday morning. I figured it was something minor, and that they would just reflash the computer or tweak something. 2 hours later they called me in and told me the #4 cylinder had ZERO compression. I managed to get the dealer to issue me a loaner even though I didn't buy my truck there.
This afternoon I received a call that my truck is ready! I'll report back on what the specific cause was, but I'm speculating it was a stuck valve or soemthing.
Junior User
Joined: Apr 2004
Posts: 72
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From: Rochester
it sounds like a bad coil.... I had the same problem on my 02 and have seen TSB's on the later models I believe on this as well... same symptoms - typically the check engine light is triggered by a cylinder misfire.
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Got my truck back this morning! Much quicker than they thought it would take, because the problem turned out to be a stuck injector. They replaced the injector, and now my truck idles and drives as smooth as it looks!
Senior User
Joined: May 2005
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From: 1000 Oaks, CA
Originally Posted by TXpitdog
Got my truck back this morning! Much quicker than they thought it would take, because the problem turned out to be a stuck injector. They replaced the injector, and now my truck idles and drives as smooth as it looks!
Great news!! You had me thinking it may have been the dreaded spark plug stripping problem....
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Joined: May 2005
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From: 1000 Oaks, CA
Originally Posted by ford390gashog
the bs'd you about zero compression though.
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Freshman User
Joined: Jul 2005
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Originally Posted by TXpitdog
Got my truck back this morning! Much quicker than they thought it would take, because the problem turned out to be a stuck injector. They replaced the injector, and now my truck idles and drives as smooth as it looks!
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Fleet Owner
Joined: Jan 2004
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From: Brentwood,CA
Originally Posted by HotLap
Actually, I was wondering about that as well......would a stuck (open) injector allow compression back into the fuel rail...I would think there is some sort of a "check valve" or other way to keep this from happening?
Senior User
Joined: May 2005
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From: 1000 Oaks, CA
<embarrassed>......sheesh I should have known that....thx F390
Originally Posted by ford390gashog
the injector is in the intake not the combustion chamber. they just feed you a bs line. the injector plays no part in the compression.
