My 06' Unlimited has a very noticable vibration when I come to a stop. It vibrates the mirrors to the point that they are useless. It almost feels like it's going to stall sometimes. It also will vary in the strength of the vibration. I wish I could explain it better. It is an auto, with no lift. Any insight?
it could be the hub assembly...when i had my 2004 impala(i know its not a jeep), I had the same problem and they said my hub assembly was so loose that they all needed to be replaced. But I would gues warped roters first since that is cheaper to correct
4.0L 1999 Steel Blue Wrangler
32'' Dayton Timberlines A/T
Pacer Streetlock Rims
Smittybuilt Front Bumper
You need to raise the hood when the Jeep is idling and check things out. My first guess would be bad motor mounts from what your describing. But you would think that an '06 wouldn't have bad mounts yet.
'97 TJ--HP Dana 60 rear w/ARB--HP Dana 44 front w/high steer and ARB--5.38 gears--SM465 tranny--RE 5.5 LA kit--4:1 t case--rollin' on 37" MTR's and Allied Beadlocks
Excessive vibration (at a stop) can be a couple of things: rough idle in the motor, bad motor or trans mount. Any engine codes? Stupid question: Is your mirror tightened down properly? I know when I change my mirrors over to run without doors, if I do not tighten them properly, they will shake. Jeeps do tend to vibrate more than cars... they're not exactly a Cadillac.
A bad motor seems unlikely due to the age. However, open the hood and while the engine is running (in park with e-brake on), have a buddy vary the RPM's unsing the accelerator pedal. Visually inspect the motor for excessive side-to side- motion in the engine bay. If the motor moves more than a couple of inches to either side, then I'd say you have a cracked motor mount. Verify the cracked mount from underneath the Jeep.
It's been a while and no improvement, but it hasn't gotten worse either. It's not the motor mounts, and I haven't checked the spark plugs. I will be checking the vacuum leak idea tonight. Any other thoughts?
Could be bad/old plugs. Or also could be a fuel issue. Maybe at idle your not motors not getting sufficient fuel pressure. That could explain the vibes because the motor at the verge of stalling. Idk, just throwing it out there.
Im no expert but, Open the hood at find the fuel rail above the intake manifold. Somewhere on there should be a tip that looks like a tire valve. You can check the pressure from there I think, with the correct tool. Dont take my word for this though. Maybe someone else can elaborate a little better.
and a fix ...could be clogged injectors, or bad injector, fuel filter clogged up.
Quick thing to do thats not expensive replace the fuel filter and dump a bottle of fuel injection cleaner in the tank right before your next fill up.
Might as well just do a full tune up. Change the plugs and wires, throw in a new fuel filter and some injector cleaner, and change the air filter if needed. That whole procedure shouldnt cost more than 50 dollars give or take. And less than an hour of your time.