Possible Shudder Problem
Hey guys,
I have an 08 F150 Supercrew KR with 100k miles on it. I bought it used at 95k miles and have noticed what I can best describe as a shudder. I have narrowed it down to it only happening when im accelerating out of overdrive (going up a hill or slight incline). It will just be clunk or two and sometimes its worse than others. I have read a ton and can't really pin point the problem. I had the transmission fluid changed last month as well. I have learned how to drive it so it doesnt happen, but would still like it to be fixed. Thanks |
Low grade misfire, at 100k a spark plug change is overdue. That's exactly where in the powerband a misfire is most likely to occur.
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I agree. You described the classic misfire to a T.
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Originally Posted by glc
(Post 5075509)
Low grade misfire, at 100k a spark plug change is overdue. That's exactly where in the powerband a misfire is most likely to occur.
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Originally Posted by TBH15
(Post 5076117)
So that should fix my problem? Just replace the spark plug?
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Is that something I should probably bring to a mechanic to do? I've heard it can be tricky.
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You have an 08, if it is an early 08 with the black spark plug boots, it can be tricky. I would advise a Ford dealer or at least someone that has experience removing the two piece plugs. If it is a later 2008, with the brown sparkplug boots, it's a normal plug change that any good mechanic can do.
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Here is an easier way to tell which plugs you have as posted by MGDfan:
https://www.f150online.com/forums/5076063-post29.html |
Probably a misfire...had same problem a few years ago...swore it was the transmission because it wouldn't do it when the OD was turned off.
Turned out to be a bad coil on #3 cylinder...FWIW... Dealer tried changing the transmission fluid, TSB on the valve body, replaced OD snap ring...but it didn't fix it... |
That was my next question.. until i get it fixed should I just turn overdrive off? Whats the disadvantage with doing that?
Yall have been a great help I really appreciate it. |
Same issue i had last year (shudder on uphill or slight incline). I changed all the sparkplugs and now truck runs like a champ. Make sure you have the lisle sparkkplug removal tool when you do the job yourself. Out of 8 sparkplugs i broke 1 and the tool getthe job done yanking the broken piece out.
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