2003 Chevy Cavalier surging, rough idle, and sometimes stalling when A/C is on. IAC valve issue? Compressor fan? Compressor? Or could a car in need of a simple tuneup act like this?

Asked by May 04, 2016 at 11:36 AM about the 2003 Chevrolet Cavalier LS

Question type: Maintenance & Repair

Not mechanically inclined but I'll try to provide as much info as possible. I have 2003 chevy cavalier 4 door. I'm not exactly sure when this issue started but it is A/C related so I only noticed it a few weeks ago upon turning the A/C back on. When the car is idling at say a red light or in park the rpms surge a lot but only when the A/C is on. Turning the heat on doesn't seem to cause the same effect nor does simply having the fan on or none of the above. The rpm's surge causing a rough idle and at times for the car to stall. I had the unfortunate pleasure of experiencing this while turning into a parking space, felt like I lost power steering at the same time. The rpms actually hit 0 but the car was not completely off. The radio and other gauges were still functioning. Just no power to the engine. My car has an old R-12 refrigerant system so I got an adapter, oil, and some 134 refrigerant. Had someone show me how to do this but he stopped shy of putting the refrigerant in as the car kept surging and the A/C temperature seemed to actually get a bit warmer. After leaving though I left the A/C on and the thing was nice and cold while driving. Parked my car and the air seemed far warmer, the rpm's also starting surging all over the place after about a minute or so. Seems like there is a hissing noise around my glove compartment like air pushing out of something(he said it could be an actuator?) but I hear the hissing far more during the surging period when the car is trying to compensate and bring the rpms back in range. The interval between the surges is 5-10 seconds once it gets going. As is my car idles at around 600rpms which seems low, surges to about 900, drops to nearly 400 before going back to 600 if it hasn't stalled by then. Trying to narrow it down. Please help.

2 Answers

Oh and the check engine light is not on, no overheating, no smoking, or anything else out of the ordinary.

Sounds to me like your AC pump is starting to go. The rpm surge is when the pump freezes up. I would either disconnect the pump or have it replaced.

Your Answer

Chevrolet Cavalier Experts

  • #1
    John Saffrahn
    Reputation
    3,010
  • #2
    dandyoun
    Reputation
    1,360
  • #3
    mbar1
    Reputation
    1,220
View All

Related Models For Sale

Used Chevrolet Malibu
1,122 Great Deals out of 71,678 listings starting at $1,896
Used Chevrolet Impala
517 Great Deals out of 33,770 listings starting at $950
Used Chevrolet Camaro
412 Great Deals out of 30,658 listings starting at $3,550
Used Ford Focus
734 Great Deals out of 52,815 listings starting at $999
Used Ford Mustang
713 Great Deals out of 38,301 listings starting at $895
Used Honda Civic
826 Great Deals out of 72,773 listings starting at $1,000
Used Honda Accord
1,102 Great Deals out of 61,485 listings starting at $999
Used Toyota Corolla
913 Great Deals out of 57,317 listings starting at $1,488
Used Pontiac Sunfire
312 listings starting at $2,100
Used Toyota Camry
1,054 Great Deals out of 71,326 listings starting at $295
Used Chevrolet Silverado 1500
2,146 Great Deals out of 167,073 listings starting at $1,498
Used Chevrolet S-10
8 Great Deals out of 1,217 listings starting at $2,500
Used Pontiac Grand Prix
30 Great Deals out of 2,747 listings starting at $1,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.