my jeep is vibrating at 45 mph and when I slow down and it pops in the rear end when u take off fast. Also how do I bump the idle up bc its running at about 650 when it should be at about 1000 to 1100 plz help its my dd. Need help quick

 

Sounds like maybe a u-joint in the rear maybe,idle could be IAC or TPS or a bunch of stuff has it thrown a code yet?

 

650 rpm sounds about right and checking the rear shaft for play in the ujoint should be were you start

 

Ok ill check it tomorrow

 

It hasn't thrown a code and I'm not sure what either of the IAC or TPS means

 

IAC means Idle Air Control and TPS means Throttle Position Sensor

 

1000 RPM is high from what I have seen. All 3 I have owned run right around 650 or so. And I would guess drive shaft U-joint too.

 

X1 .unless its idling rough don't screw with it.

 

Well when I'm at a stop light it wants to die almost. If I don't put it in neutral it starts shaking a wee but

 

Do a tune up. Plugs wires cap rotor air filter.

 

Moved to OEM tech.

 

Got it fixed

 

I'll post pics of the problem in a min

 

That's my old u joint

 

looks fine to me