Mechanics

CHEVY A/C OR TRANSMISSION???

2004 Chevrolet Aveo

Air Conditioning problem
2004 Chevy Aveo 4 cyl Front Wheel Drive Automatic 83,500 miles

I want to apologize for my lateness and to Thank You! For helping me with my first question on July 4th.

From my prior question that was answered. I received my car last week Saturday after it was broken for the second time (timing belt).

I noticed by the 4th day, that my car is experiencing jerks, our lurches when the car is idle and/or driving. I have an appointment on Monday for a mechanic to look at it but it's bugging me and I want to get some prior information now before Monday.

In addition to the jerks and lurches - this is also going on when the air conditioner is on but yet, it disappears when I turn off the a/c.

I am at a lost as to rather this problem is a/c related and/or if this is a transmission problem?

Please advise.

Thank you kindly.

Follow up answer

No, check engine light is coming and no I haven't had a tune up. However, I did have my spark plugs/spark plug wires replaced on 04-11-08 by the Chevy dealer. During that time my check engine was on and there was jerks when I put the car was in reverse or acceleration.
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Eadrama
July 18, 2009.



Do you have a check engine light and when was the last tune-up?

When the AC is on it puts a load on the engine and it reacts differently if the computer don't compensate for the extra load from the compressor.

I don't believe its coming from the AC or tranny its coming from somewhere else with the symptom you described -sounds more like hesistation and stumbling below listed components could be causing it-get it check out

Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include: Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires

Rasmataz
Jul 19, 2009.
Lets follow thru to what I gave you on possible causes and get back with me with some results

Rasmataz
Jul 19, 2009.
Hi thank you for your apply. I went to the auto shop on Monday, July 20th for testing and my computer system in my car was giving out various codes. The test was supposed to take 45 minutes and ended up taking 3-hs. The manager had to call the other auto shop that did the previous work on my car and determined that one of my cylinders valves was misfiring. The previous auto shop told me to bring my car back to them and then they ran tests on my car and determined that it was my ignition coil. I replaced that but the very next day my car started misfiring AGAIN!

I end up writing a letter to the companies corporate office they contacted me on Thursday, August 6th and on Monday, August 10th I am dropping off my car to see if this other location same auto company can figure out WHY my car keeps misfiring.

That is the latest update on my Chevy Aveo.

Wish me luck!

Tiny
Eadrama
Aug 8, 2009.
My car seems to be having the same issues. I am at about 74k. Did you get your issues resolved? My head blew at about 65k, I had the entire head replaced as well as the valves, pistons, water pump etc. It cost me around 2k. About a week later, the thermostat housing cracked as I was pulling into my driveway, literally spewing anti-freeze all over the place. That cost me another hundred bucks. I am waiting for the transmission to go next and cost me another arm & leg. Did the car almost seem like it was lunging when you were stopping and idling? If so, did you get it resolved and did it end up being your transmission or something with the AC? The heat has been very bad this year, can't help but use the AC, but all of the issues I am having are much worse with the AC on. I know it puts a load on the car, but even without the AC on, the car doesn't act right. Thanks for the info.

Tiny
Samspisak1108
Aug 23, 2010.