Low RPM miss
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Member
Joined: Oct 2008
Posts: 79
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From: North Huntingdon, PA
Low RPM miss
I'm having a little trouble tacking down this problem, hopefully someone here has come across it before, I haven't had luck with the search function...
Anyways, while driving down the road the truck feels fine at speeds below 40mph or so. Only when the torque converter locks up, I can feel a miss from about 40-45 and then it smooths out again. It's so subtle, I can't even notice it unless the torque converter is locked. Speeds above that, it's smooth as can be.
I changed the air filter today, and figured I'd clean the MAF while I was in there to see if that helped. It didn't.
Any other ideas? It's just weird to me that it's in such a short rpm range.
Anyways, while driving down the road the truck feels fine at speeds below 40mph or so. Only when the torque converter locks up, I can feel a miss from about 40-45 and then it smooths out again. It's so subtle, I can't even notice it unless the torque converter is locked. Speeds above that, it's smooth as can be.
I changed the air filter today, and figured I'd clean the MAF while I was in there to see if that helped. It didn't.
Any other ideas? It's just weird to me that it's in such a short rpm range.
Thread Starter
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Member
Joined: Oct 2008
Posts: 79
Likes: 0
From: North Huntingdon, PA
I'm assuming by COP's, you guys mean coil packs...
Anyways, I haven't done a full tune up yet, so I do definately need to do that, especially plugs and wires, would like to get a fuel filter on it as well. It's a 5.4L
Hopefully a tune-up will do the trick...if not, I'll post again.
Anyways, I haven't done a full tune up yet, so I do definately need to do that, especially plugs and wires, would like to get a fuel filter on it as well. It's a 5.4L
Hopefully a tune-up will do the trick...if not, I'll post again.
Senior Member
Joined: Dec 2007
Posts: 265
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From: Kennesaw, Georgia
im having the same problem on my 98 4.6L. its got 69k miles on it and the factroy plugs and wires and all. its probably due for a tune up, but i thought it had something to do with the tranny, so i didnt worry about it. one more thing, i was over at the tranny shop and the guy just poured some anti-shudder stuff in the tranny. that seemed to fix it for a little while, but maybe it just didnt show up and the stuff didnt help at all. now that i've got my tuner, it happens at 35-40 where as before it only happened right at 40. so is this a problem with the engine? thanks in advance.
