How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask FIXITMAN Your Own Question
FIXITMAN, Master Technician
Category: GM
Satisfied Customers: 17326
Experience:  ASE Master Certified
Type Your GM Question Here...
FIXITMAN is online now
A new question is answered every 9 seconds

I have a 2005 GMC Envoy. Replaced the A/C compressor twice

Customer Question

I have a 2005 GMC Envoy. Replaced the A/C compressor twice in 13 months. the engine sputters at when not in motion while the AC is on. the MAP sensor codes the check engine light. any idea?
Submitted: 1 year ago.
Category: GM
Expert:  FIXITMAN replied 1 year ago.

Hello, my name is***** for the question. Can you tell me how it idles with the AC off? Why was he conpressor replaced?

Customer: replied 1 year ago.
No cold air. Used the R-134a with sealant. the clutch bearing went out
Customer: replied 1 year ago.
The MAP Sensor is loose. Someone had tie strapped it down.
Expert:  FIXITMAN replied 1 year ago.

Thanks. You need to fix the MAP sensor mounting and make sure that it is sealed to the manifold. If not this will happen due to the false reading of the sensor and the vacuum leak that has occurred. I would also clean the throttle body as that will help also.