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
    8,130
  • #2
    John Carson
    Reputation
    2,270
  • #3
    MoGo
    Reputation
    1,980
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Cruze
64 Great Deals out of 1,187 listings starting at $2,495
Used Chevrolet Malibu
46 Great Deals out of 1,132 listings starting at $2,995
Used Chevrolet Corvette
29 Great Deals out of 593 listings starting at $10,989
Used Chevrolet Camaro
25 Great Deals out of 511 listings starting at $11,500
Used Chevrolet Impala
11 Great Deals out of 136 listings starting at $3,990
Used Ford Mustang
61 Great Deals out of 1,603 listings starting at $6,500
Used Ford Focus
21 Great Deals out of 549 listings starting at $2,499
Used Honda Civic
190 Great Deals out of 4,208 listings starting at $2,916
Used Toyota Camry
44 Great Deals out of 1,140 listings starting at $3,900
Used Chevrolet Colorado
38 Great Deals out of 1,157 listings starting at $5,999
Used Lexus IS
27 Great Deals out of 391 listings starting at $5,400
Used Pontiac G6
15 listings starting at $7,999
Used Nissan Sentra
63 Great Deals out of 1,899 listings starting at $2,288
Used Chevrolet Equinox
103 Great Deals out of 3,646 listings starting at $1,995
Used Chevrolet Silverado 1500
222 Great Deals out of 9,112 listings starting at $2,900

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.