Misfiring again!
Senior Member
Joined: Jan 2009
Posts: 637
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From: PC, FL
could be wrong
Technical Article Contributor
Joined: Dec 1997
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From: Windsor,Ontario,Canada
Regards
Jean Marc Chartier
Technical Article Contributor
Joined: Apr 2009
Posts: 10,697
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From: In the fast lane from LA to Tokyo...
im gonna throw my 2cents in and say i think the problem is that when they clean them at a dealership once their done they sit on the lot(sometimes a long long time) with the water sitting in all the wrong places. then when the everyday person cleans the motor it gets driven the next day usually so the water has less of a chance of getting to the plugs.
could be wrong
could be wrong
Senior Member
Joined: Jun 2007
Posts: 5,522
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From: Utah
The next time I wash my engine it will be right before the plug change..
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Joined: Nov 2007
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From: whaleyville, MD
they did change the boots up in late 07 with the new head/plug design. maybe they seal alot better. i havent seen a new one yet so i honestly cant tell you. but 97-early 07 cop systems definately dont like water.
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Joined: Nov 2008
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From: se texas
if they changed them before april of 07 then i have the later design if not then i have the early design. april is when i bought it.
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Joined: Nov 2007
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From: whaleyville, MD
that dont mean anything. you have to look at the build date on the door jam sticker. the truck could have sat on the lot for a month(or more) before you bought it.
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Joined: Dec 2006
Posts: 77
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From: TN
Hello, I am a new member here. In April I bought a 07 F150, 5.4 w/ 18k miles. within the first week it developed a misfire...no big deal, I took it down to the dealer and they replaced #4 cop and spark plug. Less than two weeks later same thing ...back to the dealer and again #4 only this trime we just had to replace the plug. Less than two weeks later #6 cop and spark plug, well now I have a misfire again. What is going on! This truck was a "factory truck" and it looks like it may have sat for awhile, the cam covers have some light oxidation on them. I told the dealer that I wanted all cop and plugs changed because I don't have time to go there every other week to have my truck serviced. Anyone else have this much trouble? Any insight, suggestions or comments would be appreciated.
Tom
Tom
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Joined: Sep 2007
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From: >wwOwww<
Back in the stone age, when we washed our old oil leaking clunkers. We just left them running while we washed them and sprayed the inside of the distributor cap, with a contact spray{I don't remember what it was called}.
But back in those days, you didn't even want to work on the engine until it was washed
But back in those days, you didn't even want to work on the engine until it was washed
Senior Member
Joined: Nov 2008
Posts: 626
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From: se texas
Back in the stone age, when we washed our old oil leaking clunkers. We just left them running while we washed them and sprayed the inside of the distributor cap, with a contact spray{I don't remember what it was called}.
But back in those days, you didn't even want to work on the engine until it was washed
But back in those days, you didn't even want to work on the engine until it was washed
and the build date is 5/07 so i guess i bought it May not April lol it was one of them months. it was on the lot a few days before i bought it still was wrapped in all of the plastic inside and out with 2 mi on the odo.
Last edited by jrfonte; Jun 26, 2009 at 05:18 PM.
