specific shake/shudder at 40-50 1100-1300 rpm
#1
specific shake/shudder at 40-50 1100-1300 rpm
nuff said, only happens when there is an incline, not much of an incline is needed either. just starts to shudder i'd say. maybe even go as far as saying it feels like a jolt like trying to shift but refuses. ah i'm no mechanic so what do you all think?
#3
I had the same issue on my 99 4.2L. At about 120k miles, from 1500 to about 1600 rpms, the whole truck would get a shake and it ended up being caused by a bad coil pack.
#7
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#10
Yep sounds like a low grade misfire. Is it happening as the truck just shifts into OD? As others have stated, most likely it's a coil over plug going bad.