smokng o-ring
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New User
Joined: Apr 2004
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smokng o-ring
I replaced the o ring in #5 cyl. which I pinpointed as a smoker w/ a breakout box.
While I had the valve cover off I figured I'd
swap it w/ #3 cyl. which also got new O rings. Helped for about a week and now seem to smoke @ #5 again. Seems worse when humidity is high. Is that possible. When I disable it with the breakout the smoke clears. I have no DTC. But it idles rougher when smoking, I guess. Like I'll pull out #5 and see if anythig looks unusual. Is it possilbe for an o ring not to seal?
It's a 99 f250 w/193K miles that otherwise runs good, doesn't use oil.the oil and fuel filter are new.Any other advice?
While I had the valve cover off I figured I'd
swap it w/ #3 cyl. which also got new O rings. Helped for about a week and now seem to smoke @ #5 again. Seems worse when humidity is high. Is that possible. When I disable it with the breakout the smoke clears. I have no DTC. But it idles rougher when smoking, I guess. Like I'll pull out #5 and see if anythig looks unusual. Is it possilbe for an o ring not to seal?
It's a 99 f250 w/193K miles that otherwise runs good, doesn't use oil.the oil and fuel filter are new.Any other advice?
Elder User
Joined: Dec 2001
Posts: 582
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From: Kelowna B.C.
Thats interesting my late 99 is in at ford and they are replacing #5 injector because it smokes on startup. They pulled the exhaust manifolds and found #5 to be "oiler than the rest". When you idle yours up does it shoot a cloud of blue when you let off the throtle when cold?
Postmaster
Joined: Feb 2002
Posts: 2,773
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From: Bonney Lake, WA
Is it possilbe for an o ring not to seal?
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New User
Joined: Apr 2004
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Thanks for the reply Quad I can't saay I let it sit for 30 min and by all indications I
really thinnk that my be the problem I was also told to chaeck compression which I'll do when I get the truck to work on again
really thinnk that my be the problem I was also told to chaeck compression which I'll do when I get the truck to work on again
