fluke?or major problem?
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Freshman User
Joined: Jul 2006
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fluke?or major problem?
I have an 04' F-150 FX4 5.4 with 36000 on it.My brother-in-law noticed the other day when i started it that it let out some blue smoke when first started but then cleared up! it did it two more times that day then just stopped!and i havent noticed it since!I talked to my dealership and they think that maybe an injector was sticking?any body have this problem or ideas? thanks
New User
Joined: Jul 2006
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I think an injector sticking would cause more of a blackish smoke (fuel related) rather than blue smoke (oil related). Just my opinion, but it seems there may be something more going on, especially with a truck with that few miles.
Robbie
Robbie
Tuned
Joined: Aug 2006
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From: Bartlett, TN
Mine did that once..........
But it was after I released the key to quick and it didnt start. Something happend and I had to wind it a bit for it to crank. When it did start, Blue looking smoke. Has not happened since.
Keep an eye on it. If it happens more, surely take it in.
But it was after I released the key to quick and it didnt start. Something happend and I had to wind it a bit for it to crank. When it did start, Blue looking smoke. Has not happened since.
Keep an eye on it. If it happens more, surely take it in.
Posting Guru
Joined: Jul 2004
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Since it only happens when starting, that usually indicates oil running into the cylinder via a valve stem seal, not sealing correctly. Why not try a good injector and top end combustion chamber cleaner see if that helps. You may have some carbon buildup on the valve stems.
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From: your town
Originally Posted by KevinM
Since it only happens when starting, that usually indicates oil running into the cylinder via a valve stem seal, not sealing correctly. Why not try a good injector and top end combustion chamber cleaner see if that helps. You may have some carbon buildup on the valve stems.
Senior User
Joined: Jun 2003
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From: Kansas City
For what its worth on another forum for Mustangs I read that the new mustangs will do this after sitting for a while. I believe the consensus was (theirs not mine) that this was normal and caused no damage.
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Senior User
Joined: Jun 2006
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From: your town
Right, it isn't really going to heart anything. But it doent make it right. The 4.6l seem to have the problem the most.
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Senior User
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From: Kansas City
I agree but if it is just occasional I don't see any real problem. A bad valve guide would cause excessive smoke after any type of idle time (especially on). The 4.6's seem to do this when they are high mileage but still run fine.
MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,606
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From: SE Georgia
my 94 with a 302 does this alot also. the smoke is related to my deployments. under normal driving, the truck will never blow any smoke at all. every time I get deployed though, the truck will sit for 2 to 3 months before it gets started back up and it'll blow white/blue/black smoke for the first day or so when started up. it does not however use a drop of oil. always 5 qts in, 5 qts out
I just attribute it to valve leakage and combustion chamber fouling from sitting an extended period of time. I'd think you're safe with you truck. how long does it site before you notice the smoke?
I just attribute it to valve leakage and combustion chamber fouling from sitting an extended period of time. I'd think you're safe with you truck. how long does it site before you notice the smoke?