Hi all, I'mafter a little advice on a bit of strange behaviour from my wj. It's a 2005 4.7 ho with 155,000 Ks on the clock.
The problem used to only happen at high speed when I had the cruise control on. It'd be going along nicely then get to a very slight incline and start slamming the accelerator on and off. It'd get so bad I'd have to disengage cruise control because id be getting shunted back an forth each time.
After a while I found I could hold my accelator pedal still enough when at high speed that it would do the same thing.
Now it'll do it at low speed, but only at low revs, say if I'm cruising through the neighborhood at maybe 1600 revs. It's not such a hard shunt, but more of a surge of revs up and down. It makes my head nod forward and back, so it still pretty noticeable.
Any idea of what's going on here? Under throttle its fine, with heaps of power and no stutter so I'm wondering if maybe something as simple as a fuel additive is needed to give it a clean or maybe it's something not too advanced that I can tackle myself. Otherwise it's be good to have some pointers from the brains trust before I take it into my mechanic
The problem used to only happen at high speed when I had the cruise control on. It'd be going along nicely then get to a very slight incline and start slamming the accelerator on and off. It'd get so bad I'd have to disengage cruise control because id be getting shunted back an forth each time.
After a while I found I could hold my accelator pedal still enough when at high speed that it would do the same thing.
Now it'll do it at low speed, but only at low revs, say if I'm cruising through the neighborhood at maybe 1600 revs. It's not such a hard shunt, but more of a surge of revs up and down. It makes my head nod forward and back, so it still pretty noticeable.
Any idea of what's going on here? Under throttle its fine, with heaps of power and no stutter so I'm wondering if maybe something as simple as a fuel additive is needed to give it a clean or maybe it's something not too advanced that I can tackle myself. Otherwise it's be good to have some pointers from the brains trust before I take it into my mechanic
pulsing throttle at low revs
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