My 2005 is giving me a problem:
5.7 Hemi
5sp auto
4wd
Canada
Its not throwing any codes, no dash light anyhow.
when I am driving it seems fine until I get it fully warmed up, on the hyw and set the cruise at 90-100kph
Faster still happens but its less pronounced slower also less pronounced, I can only feel it in high gear. It may be happening in 4th but I don't think so.
its fine on flat ground or downhill but if headed up a slight hill where the CC is applying throttle to keep speed (but not so much it downshifts) it starts to do something hard to describe. When I first felt it I thought I was just hitting frost lines in the road, but then I realized that was not it. Imagine a garden hose laying across the road, when you hit it you just feel a 'bump' but of course in the case of road debris you feel it twice for front and back wheels, this is only once.
Its getting worse, its not CC I can replicate it myself if I am careful on throttle application.
I don't think its Trans its very abrupt too fast for a disengage/reengage of a band or anything. I was thinking maybe the convertor lockup slipping, but that should not come back in hard, it should be a smooth re-engage I think.
The RPM on the tack does not change.
I was talking with one person and he thinks its ignition, like a cracked/bad coil that is slowly giving out. Under heavy load at a specific RPM he thinks its misfiring.
But no codes, a bad coil should be throwing codes right?
A slipping Torque convertor should be throwing codes right??
As it is getting worse, the length of time where I feel like there is no power is increasing, at first and most of the time it was like a few hundredths of a sec, now some of the 'events' are perhaps 1/10 sec.
seems most pronounced at 1800-2000 RPM, I guess my main question is, would the ECU not detect a partially failing coil and thus not thro a code.
any ideas?
Thanx in advance!
5.7 Hemi
5sp auto
4wd
Canada
Its not throwing any codes, no dash light anyhow.
when I am driving it seems fine until I get it fully warmed up, on the hyw and set the cruise at 90-100kph
Faster still happens but its less pronounced slower also less pronounced, I can only feel it in high gear. It may be happening in 4th but I don't think so.
its fine on flat ground or downhill but if headed up a slight hill where the CC is applying throttle to keep speed (but not so much it downshifts) it starts to do something hard to describe. When I first felt it I thought I was just hitting frost lines in the road, but then I realized that was not it. Imagine a garden hose laying across the road, when you hit it you just feel a 'bump' but of course in the case of road debris you feel it twice for front and back wheels, this is only once.
Its getting worse, its not CC I can replicate it myself if I am careful on throttle application.
I don't think its Trans its very abrupt too fast for a disengage/reengage of a band or anything. I was thinking maybe the convertor lockup slipping, but that should not come back in hard, it should be a smooth re-engage I think.
The RPM on the tack does not change.
I was talking with one person and he thinks its ignition, like a cracked/bad coil that is slowly giving out. Under heavy load at a specific RPM he thinks its misfiring.
But no codes, a bad coil should be throwing codes right?
A slipping Torque convertor should be throwing codes right??
As it is getting worse, the length of time where I feel like there is no power is increasing, at first and most of the time it was like a few hundredths of a sec, now some of the 'events' are perhaps 1/10 sec.
seems most pronounced at 1800-2000 RPM, I guess my main question is, would the ECU not detect a partially failing coil and thus not thro a code.
any ideas?
Thanx in advance!
