why when in gear idling and you turn ac on or heater on does it rough idle

35

Asked by Aug 19, 2014 at 04:19 PM about the 2001 Ford Escort

Question type: Maintenance & Repair

car runs fine ac on works fine but when at stop sign it runs realy rough when i use heater it also does this?

6 Answers

110

Sounds like your idle air valve is not compensating for extra load from AC compressor be it a control issue or a physical problem with idle air valve it self. When you say heater do you mean defrost because AC generally works on defrost to dehumidify

2 of 2 people found this helpful.
35

when i say heater i mean no matter weather i put the heater on for heat or i put ac to cool.the engine goes to a rough idle? turn the control knob to off and the engine runs smooth when idling in gear???

2 of 2 people found this helpful.
110

Is the heater fan on when HVAC controls are turned on? Just double check that AC isn't turning on, open hood and watch compressor clutch. Verify it's not engaging . Possible fan lost could drag down alternator and put load on engine

35

i will check if the fan is turning on !cooling and heating works fine when turned on never checked fan?will do this now!get back to you and thanks.

35

checked fan.all is working well.when fan comes on ,rough idling?when fan goes off because i turn knob to off.smooth idle?would that make problem idle control valveonly???

1 of 1 people found this helpful.
20

I have a similar issue, I have a 2001 4dr Ford Escort 2.0, I found out that when I have the ac, heater fan off, ac fan to head n heater fan to feet, it won't revive every 5 seconds on a stop or red light. However, it will revive every 5 seconds for a second or two when on ac, max ac, heater fan to head n feet and window and feet. What could be causing reviving every 5 seconds lasting 1-2 seconds when in those ac or heater settings?

2 of 2 people found this helpful.

Your Answer

Escort

Looking for a Used Escort in your area?

CarGurus has 305 nationwide Escort listings starting at $899.

ZIP:

Ford Escort Experts

  • #1
    Tom Demyan
    Reputation
    1,050
  • #2
    dandyoun
    Reputation
    880
  • #3
    tennisshoes
    Reputation
    430
View All

Related Models For Sale

Used Ford Focus
752 Great Deals out of 61,397 listings starting at $900
Used Ford Escape
1,216 Great Deals out of 102,902 listings starting at $1,200
Used Ford Mustang
567 Great Deals out of 38,832 listings starting at $1,895
Used Ford F-150
3,125 Great Deals out of 219,058 listings starting at $1,200
Used Ford Explorer
1,181 Great Deals out of 68,830 listings starting at $750
Used Ford Fiesta
159 Great Deals out of 16,360 listings starting at $2,800
Used Ford Taurus
232 Great Deals out of 14,929 listings starting at $1,800
Used Honda Civic
767 Great Deals out of 60,153 listings starting at $950
Used Toyota Corolla
924 Great Deals out of 63,625 listings starting at $1,850
Used Ford Ranger
193 Great Deals out of 5,516 listings starting at $999
Used Toyota Camry
1,026 Great Deals out of 85,948 listings starting at $800
Used Honda Accord
1,101 Great Deals out of 71,974 listings starting at $1,100

Used Cars For Sale

2002 Ford Escort For Sale
51 listings starting at $899

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.