why does my rpm drop when my car is idling at a stop and the heater or a/c is on?

Asked by Sep 13, 2013 at 03:00 PM about the Chevrolet Cobalt

Question type: General

when I'm stopped at a red light or stop sign and my heater or a/c is on my cobalt acts like
it wants to stall out. My engine temperature fluctuates between 189 to 196 degrees.

2 Answers

25

a couple things.. so if your heater/AC is NOT on it idles fine at stop? Is heat on defrost? Could it be the AC compressor kicking on? Maybe check fuel pressure. Possible tune up

109,945

Dirty or faulty idle air control valve. Clean or replace it as needed.

Your Answer

Add photo

Related Questions

Search Chevrolet Cobalt Questions

Chevrolet Cobalt Experts

#1 lightGear
lightGear
Reputation 1,120
#2 dandyoun
dandyoun
Reputation 930
#3 munron
munron
Reputation 910
View All

Related Models For Sale

Used Chevrolet Cruze
900 Great Deals out of 74,709 listings starting at $2,997
Used Honda Civic
633 Great Deals out of 88,620 listings starting at $995
Used Chevrolet Malibu
910 Great Deals out of 79,544 listings starting at $1,500
Used Ford Focus
552 Great Deals out of 57,040 listings starting at $1,095
Used Ford Mustang
458 Great Deals out of 45,641 listings starting at $1,999
Used Chevrolet Impala
578 Great Deals out of 31,559 listings starting at $799
Used Chevrolet Camaro
218 Great Deals out of 30,799 listings starting at $1,217
Used Chevrolet SS
4 Great Deals out of 1,117 listings starting at $25,750
Used Honda Accord
803 Great Deals out of 84,448 listings starting at $988
Used Honda Civic Coupe
175 Great Deals out of 16,893 listings starting at $800
Used Dodge Charger
400 Great Deals out of 28,096 listings starting at $1,988
Used Nissan Altima
1,011 Great Deals out of 81,095 listings starting at $1,200
Used Toyota Corolla
773 Great Deals out of 73,085 listings starting at $1,260
Used Chevrolet Cavalier
1,007 listings
Used Ford Fusion
1,106 Great Deals out of 83,160 listings starting at $998

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.