Anyone ever have a A/C compressor seize up intermittently?

[Scott89TTA]

Like the subject says...anyone ever have a A/C compressor seize up intermittently? Trying to figure out what is causing my engine buck, belt to shred and even backfire a couple times on one occasion. As suggested by Julio and Paul the backfire is more than likely caused by interference with the crank sensor/losing sync...my guess it the strips of the shredded belt may have messed with the crank sensor reading?

Anyhow please see my original thread here http://www.turbobuick.com/forums/threads/do-i-have-a-failing-coil-pack-or-something-else.383541/ and make all replies there.

Thanks,
Scott

 

[TurboBuRick]

Unplug the clutch if the compressor is locked up.

 

[BOP4ever]

Had that happen on my 04 gmc Yukon.
Made a loud buzzing noise too.
Was real intermittent.

 

[regan j]

What are your pressures?? High and Low.

 

[BOP4ever]

Mine were pretty normal pressures if your asking me and the system worked fine cooling wise.

 

[87GNSteve]

I had a new replacment compressor with low miles that was little over 1 yr old do that.
I also had a factory one completely seize back in the early 1990's left me stranded in the middle of nowhere.

 

[Scott89TTA]

OK...so I finally had a chance tho check my car out yesterday. Just idling in my driveway the car was running excellent...very smooth then I turned on the defroster and immediately the compressor started cycling on and off. Every time it did the engine would baug way down and almost sputter then come back to normal with each cycle. I unplugged the compressor and let it run for 15 minutes or so and everything seemed fine...I didn't get a chance to drive the car though. I decided to drive it to work this morning and after about 20 minutes (20+ miles of driving) it started to surge/buck again some with a small backfire...no issues with the belt this time however it was not nearly as bad as it was before when the compressor was plugged in. All my pulleys look good, balancer looks fine...no wobble that I can see. Obviously something is failing and causing the motor to stumble ocassionaly backfire after it is running for a while. Last week when the surge was bad it literally felt like the car was shifting in and out of gear and was almost violent at times...again wasn't nearly as bad this morning but still there. How do I know if the crank sensor or cam sensor is bad or going bad...any way to test them?

 

[Scott89TTA]

See my update in the Turbo Trans Am section...
http://www.turbobuick.com/forums/threads/do-i-have-a-failing-coil-pack-or-something-else.383541/

 

[Scott89TTA]

Looks like it was the ignition module...see my update in the TTA section. Keeping my fingers crossed!!!