Idle issue when A/C is on

[Justemptyeverypocket]

My Jeep idles smooth as silk until the heat of ac is turned on then it bounces is this a sign of a bad pressure switch ? Please excuse my talking took this at 6am before my drive to work

 

[Rubicon88]

Throttle body is dirty

 

[Justemptyeverypocket]

Throttle body is dirty

Cleaning the throttle body changed nothing

 

[Rubicon88]

Cleaning the throttle body changed nothing

Did you do a computer reset?

 

[Justemptyeverypocket]

Did you do a computer reset?

Yes

 

[WSS]

I hear the vents blowing. Does the motor actually fluctuate like the tach? Does it do the same thing with the blower turned down to 1 or low?

 

[Justemptyeverypocket]

I hear the vents blowing. Does the motor actually fluctuate like the tach? Does it do the same thing with the blower turned down to 1 or low?

Yeah

 

[DylanM345]

The rpms will fluctuate due to the ac conpressor cycling on and off. When the conpressor cycles on it will spike the rpms a decent bit. There is a way to fix it known as the knucklehead AC bypass on wrangler forum
I did it on mine and its nice because I can use the defrost and have the face and feet on without ac

 

[WSS]

If his pump is cycling that fast, it is probably a switch or electrical interruption.

 

[Justemptyeverypocket]

She also jumps if im doing any sort of speed with the heat or ac on I can watch my tac jump up in rmp if that makes sense and the Jeep bucks

If his pump is cycling that fast, it is probably a switch or electrical interruption.

 

[qslim]

So this is only a function of AC or does it do the same thing when the HVAC knob of out of the air conditioning position? If it's only on an AC pop your hood & see if the compressor clutch is cycling on & off with the fluctuating RPMs.

 

[WSS]

In your original post, you did not mention "heat", is this a new development or was this also previous to your OP?

 

[Justemptyeverypocket]

It's also with the heat on but I can see the ac cycling even when it's not supposed to be

 

[Justemptyeverypocket]

It's when ever the heat or ac is on the knob can be on defrost or blowing straight at me it makes no difference my main problem is the bucking it does it makes the Jeep almost undrivable when I have heat or ac on which is a problem in colorado

So this is only a function of AC or does it do the same thing when the HVAC knob of out of the air conditioning position? If it's only on an AC pop your hood & see if the compressor clutch is cycling on & off with the fluctuating RPMs.