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

Asked by markterri2013 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

45

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

2 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    munron
    Reputation
    8,430
  • #2
    John Carson
    Reputation
    2,290
  • #3
    MoGo
    Reputation
    1,990
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Cruze
44 Great Deals out of 956 listings starting at $2,195
Used Chevrolet Malibu
49 Great Deals out of 1,157 listings starting at $1,495
Used Honda Civic
174 Great Deals out of 3,598 listings starting at $2,495
Used Chevrolet Corvette
17 Great Deals out of 1,035 listings starting at $14,900
Used Chevrolet Colorado
31 Great Deals out of 1,440 listings starting at $6,800
Used Honda Accord
40 Great Deals out of 909 listings starting at $2,799
Used Toyota Camry
53 Great Deals out of 963 listings starting at $2,212
Used Chevrolet Camaro
21 Great Deals out of 321 listings starting at $10,500
Used Chevrolet Impala
14 Great Deals out of 115 listings starting at $3,531
Used Ford Focus
26 Great Deals out of 492 listings starting at $2,950
Used Toyota Corolla
115 Great Deals out of 1,958 listings starting at $2,905
Used Dodge Charger
36 Great Deals out of 626 listings starting at $4,888
Used Chevrolet Equinox
79 Great Deals out of 2,801 listings starting at $4,499
Used Ford Mustang
42 Great Deals out of 1,255 listings starting at $4,995

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. Content will be removed if CarGurus becomes aware that it violates our policies.