The air conditioner seems to make the RPMs spike on my car when it is idling. So much so that it pushes back at me when I am holding down the brake at an idle. Absolutely no problems with this when the air is off
You most likely have an AC compressor that is cycling on and off to often, this causes the RPMs at idle to fluctuate. The rapid cycling of the AC compressor is caused by a low AC system charge of refrigerant due to a leak in most likely the compressor shaft seal. Please have an AC repair ship confirm this educated guess..
SOURCE: 06 Cobalt My idle keeps on going up and down between 500 and
Sounds like your idle air control valve is going out on you. The IAC is located on the throttle body which is where the air duct tube ends coming from the air filter. It is held on by a couple of screws and is easy to replace. Let me know if you have any questions. Thanks for rating my response and for using FixYa!
SOURCE: High Idle Issue
Sounds like the idle speed control motor is stuck, this could have been caused by the cleaning.
SOURCE: 1995 Chev S10 4.3L V6 rough idle and under power
This make/model has a chronic problem with EGR clogging. If you have a dashboard indicator showing "check engine" most likely it is a trouble code indicating and EGR (exhaust gas recirculator) valve problem. Symptoms are rough idle, and surging and stalls.
What happens is sediments from the exaust manifold get sucked up into the valve when it opens, then stick in the valve and keep it from closing. When the valve is open when it should be closed, the engine runs very rough.
I removed my egr and then dislodged the sediment (pea-sized debris) and then re-installed the valve. Three days later, the same "check engine" and same rough idle. I must have did this at least three or four more times.
What I found that gave me a permanent solution was an aftermarket filter gasket that keeps debris from clogging. I don't remember the name of the product, but a search for "EGR filter gasket" may lead you to the product.
Install the gasket between the EGR and the exhaust manifold and you should be good to go. Note: on 1995 and newer models, disconnecting the EGR from the wiring harness (common on R&R) may require the computer to be reprogramed.
SOURCE: 2006 chevy aveo; revs while idling; gas pedal gives no response
your vehicle will need a complete computer diagnostics to determine this problem and its solution. there are a lot of unknown variables to be able to accurately begin to solve this.
SOURCE: Low oil pressure on 2001 Suburban
your oil sensor comes on at less than ten psi, you may have internal engine damage how many miles on engine, any gum up inside engine, you can try to put on a high pressure high volume melling oil pump to try to help for the time being, but you may need to have it torn and repaired.
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