My H-3 HOPS

[Hmmm2]

I've had the hop happen to me twice on two different days. I tried to duplicate it on purpose, and it didn't do it. At both times I was making a tight u-turn in the middle of the street. I know if I go to the dealer it won't happen, so I'll hold off. I think this has happened to me in our Jeep Grand Cherokee on a very tight turn, too, in the past.

[usetosellhummer]

turn too hard with a real full time 4wd that happens. Probally nothing really wrong

[RubHer Yellow Ducky]

Originally Posted by usetosellhummer

turn too hard with a real full time 4wd that happens. Probally nothing really wrong

Why in one of my H-3's and not the other...

RYD

[KenP]

I have it happen all the time in parking lots. Even freshly paved ones. When one tire hits the line, that tire slides a bit causing a hopping feeling.

[RubHer Yellow Ducky]

Originally Posted by KenP

I have it happen all the time in parking lots. Even freshly paved ones. When one tire hits the line, that tire slides a bit causing a hopping feeling.

Ken

Thanks. There were no smooth paint lines, no small rocks, no nothing other then clean paved asphalt. Ran both H-3's in the same area (as close as possible), same speed, etc...

I am gona check the tire pressure in the Gray H-3. I had just adjusted the pressure in the Yellow Duck to 40psi. Both H-3's had cold tires altho the Gray one may have been slightly warm.

I will check the gas tanks to see if both have around similar gas weights altho I don't see how that would effect it.

I will advise and still seek any additional thoughts and comments.

Thanks everyone

RYD

[Dave LV]

Try going off road and cycle the 4x4 locked on and off, and then do the 4x4 low. Perhaps something go stuck....

[ChevyHighPerformance]

I noticed some of this and the PCM sees this too. When I'm going up a smooth winding hill (i.e., no washboard) at low-med throttle, I see knock retard (about 6 degrees) during each bend. During heavy throttle (not WOT) I don't see any knock retard on the same hill. I just assumed it low throttle, the three is a three way power struggle between the front wheels, rear wheels, and the engine and the torque transfer fed back as pulses into the engine creating some noise that was picked up by the knock sensor. During heavy throttle the engine won the power battle and front and rear wheels fought it out.