Stumble
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Stumble
My boss' truck has a bit of a stumble. While going down the road between 40-60 MPH it will kind of stumble. While it's an intermittant problem, it seems to happen when climbing a slight grade.
I plugged a diagnostic tool into it and got no codes of any kind. He had it at a trans shop, thinking there might be some trans slippage, but the shop said the trans was fine.
The vehicle in question is a 2006 F-150 Lariot 2WD with a 5.4, auto trans. Any ideas?
Hartski
I plugged a diagnostic tool into it and got no codes of any kind. He had it at a trans shop, thinking there might be some trans slippage, but the shop said the trans was fine.
The vehicle in question is a 2006 F-150 Lariot 2WD with a 5.4, auto trans. Any ideas?
Hartski
Last edited by hartski; May 29, 2012 at 07:03 PM. Reason: Error
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Have the plugs been changed since new? If not I would bet it's a bad plug, second guess is a bad coil. A bad coil may not throw a code. If money is not a major concern you can get 8 new non-oem coils for around $120. Wouldn't hurt to swap them all at that mileage. Takes about an hour. How does it idle?
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It idles OK, I know some of the coils have been changed but I don't know which ones.
I was on the Autolite website getting some info on the spark plugs and they have a very elaborate procedure for changing them. it involves loosening the plugs, soaking everything with carb cleaner, and waiting 1/2 an hours for the carbon to loosen.
Is all that really necessary?
Who sells those coils?
Hartski
I was on the Autolite website getting some info on the spark plugs and they have a very elaborate procedure for changing them. it involves loosening the plugs, soaking everything with carb cleaner, and waiting 1/2 an hours for the carbon to loosen.
Is all that really necessary?
Who sells those coils?
Hartski
Logistics Pro
Joined: Mar 2001
Posts: 4,157
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It idles OK, I know some of the coils have been changed but I don't know which ones.
I was on the Autolite website getting some info on the spark plugs and they have a very elaborate procedure for changing them. it involves loosening the plugs, soaking everything with carb cleaner, and waiting 1/2 an hours for the carbon to loosen.
Is all that really necessary?
Who sells those coils?
Hartski
I was on the Autolite website getting some info on the spark plugs and they have a very elaborate procedure for changing them. it involves loosening the plugs, soaking everything with carb cleaner, and waiting 1/2 an hours for the carbon to loosen.
Is all that really necessary?
Who sells those coils?
Hartski
How many miles on the truck?
DG511 SET OF 8 NEW IGNITION COILS FOR FORD LINCOLN MERCURY * LIFETIME WARRANTY | eBay
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160K. Some of the plugs have been changed but not all. At this point I don't know which have been changed and which haven't.
he wants me to do this on the side for him but I'm starting to think that I want no part of it.
Thanks for the heads up.
Hartski
he wants me to do this on the side for him but I'm starting to think that I want no part of it.
Thanks for the heads up.
Hartski
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Logistics Pro
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Yeah, not sure why only some of the plugs have been changed-with that many miles plugs are long overdue. Find a competent mechanic who has exp with fords and the spark plug issue-it's somewhat common. The broken plugs can be removed with the right tool-not impossible, just a pain. After all plugs are changed, change fuel filter. If that doesn't cure it, coils.
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From: Orange County, CA
The dealer did mine, cost about $600 for everything, no plugs broke. With that many miles those plugs should have been changed on your bosses' truck, at least once. Ford recommends every 60K now for change
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