Every time my A/C is on and my car is in drive and I press on the accelerator there is a grinding noise that comes from the engine, I can even feel the vibration in the accelerator a little bit when this happens. My a/c compressor has been replaced and it was having this issue before that went out. The grinding only happens when I press on the accelerator from a complete stop. It only grinds for about 1 second after pressing the accelerator then goes away. Again this ONLY happens when the A/C is on, when its off this does not happen.
It will be the ac compressor clutch that slipping when after it has been activated/engaged. This happens when the engine is winding up the compressor clutch is not engaging strong enough and start slipping. However as the engine rpm stabilize on the ac compressor has caught up (same rpm) no slipping occur and no noise. Was the clutch mechanism replaced with the compressor replacement? (however it need to be checked/repaired).
SOURCE: Rattling noise
I have a 98 blazer that makes similar sounds but it's pieces of the dust shield off the rear wheel assembly that got down inside the brake rotor. Only happens when the truck is going forward
SOURCE: 1996 chevy K1500 transfer case slipping out of 4 wheel drive
Your trouble is most likely not in the transfer case but in the front differential engagement solenoid.
SOURCE: 1998 Chevy Prizm A/C and Cooling Fan Problems
Compressor could not work without cooling fan comming on.
Check compressor mounting bolts and belt placement on pulley regarding the noise.
But before we get to the a/c system repairs its important to have a properly working cooling system.
Is the car overheating ? It should if neither fan works.
If I recall correctly the fan switch is usually on the upper radiator hose coupling.
you may want to test the fan(s) its self. Remove the electical connectors fron the fan(s) , fabricate a set of jumper wires and run it from the battery. If this works the fan(s) are ok . If it doesn't replace the ones that don't work.
The coolant switch aka fan switch is usually tested with an ohmmeter . Use shop manual for testing procedure.
Test the a/c fan and engine cooling fan relays. (see shop manual for details)
Then I would start looking at coolant( correct mixture and thermostat
) although the thermostat is not likely to cause this.
If all of this still doesn't correct the problem it may be the ECU that monitors this system it may not be responding to the signal /voltage from coolant temp sensor to turn on the fan, (again nedd shop manual to test this)
Once you have a properly working cooling systemnow you can turn your focus on the a/c. Compressors either work or they don't.For you safety I recommend having the a/c system serviced by a ASE certified Technician or a tech's who legally can perform a/c service. Good luck
SOURCE: when making a left turn,
OK, you're looking at a CV Joint or Halfshaft that connects to the wheel in question.
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Were you able to find out what was the proble? I have same issue. Thanks
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