Misfire but no codes
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Misfire but no codes
2003 Ford Expedition 5.4 ltr Triton is having a misfire but do not get codes mechanic says. He does get a P1780 Transmission Control Switch but does not believe this will cause the misfire. Any help would be greatly appreciated.
Hotshot
Joined: Jan 2004
Posts: 19,760
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From: St Louis
Donuts, coffee, napping in the car...
Seriously, it's COP that is just starting to fail and the rate and incidence of misfires is not severe enough to set a fault code yet.
Plenty of previous threads - SEARCH keywords "+low +grade +misfire" or similar.
Seriously, it's COP that is just starting to fail and the rate and incidence of misfires is not severe enough to set a fault code yet.
Plenty of previous threads - SEARCH keywords "+low +grade +misfire" or similar.
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
You don't get a code until the misfire passes a certain threshold.
If you read my posts regarding this from several years ago, you'll know what to tell the mechanic.
If you read my posts regarding this from several years ago, you'll know what to tell the mechanic.
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Update:
Let me first say... I did a lot of reading and researching. Since advice given here and on many other posts, problem was a COP. Ordered eight new plugs on ebay from global-automotive at a total cost of $65. Had mechanic put in for $60 and everything is running smooth (also bought small tube of dielecrtic grease). Problem fixed. I have put on about 400 miles and still no problems.
Thanks to everyone who gave advice on this post and other posts as well!!
Let me first say... I did a lot of reading and researching. Since advice given here and on many other posts, problem was a COP. Ordered eight new plugs on ebay from global-automotive at a total cost of $65. Had mechanic put in for $60 and everything is running smooth (also bought small tube of dielecrtic grease). Problem fixed. I have put on about 400 miles and still no problems.
Thanks to everyone who gave advice on this post and other posts as well!!
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crabjoe
1997 - 2006 Expedition & Navigator
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Dec 12, 2011 05:54 PM
