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A/C only works when idling or not pressing on the gas


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robertdew76
New User

Aug 3, 2009, 8:14 AM

Post #1 of 15 (1910 views)
A/C only works when idling or not pressing on the gas Sign In

I have a 2002 pontiac sunfire. The A/C only works when the car is idling in Park. The car will surge when in drive and just idling. Sometimes the A/C works when driving as long as you are not accelerating.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 3, 2009, 9:14 AM

Post #2 of 15 (1903 views)
Re: A/C only works when idling or not pressing on the gas Sign In

Are you referring to the air flow through the vents or the temp of the air?



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robertdew76
New User

Aug 3, 2009, 11:09 AM

Post #3 of 15 (1896 views)
Re: A/C only works when idling or not pressing on the gas Sign In

I apologize, I am referring to the temperature of the air. It only blows cold air when in park...or sometimes when driving if I'm not accelerating.


Hammer Time
Ultimate Carjunky / Moderator
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Aug 3, 2009, 11:16 AM

Post #4 of 15 (1893 views)
Re: A/C only works when idling or not pressing on the gas Sign In

Have you checked to see if the compressor is running when the problem occurs?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



robertdew76
New User

Aug 3, 2009, 11:23 AM

Post #5 of 15 (1889 views)
Re: A/C only works when idling or not pressing on the gas Sign In

I haven't. I think I can trust my wife to not let off the brake while the car is in gear:)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 3, 2009, 11:25 AM

Post #6 of 15 (1886 views)
Re: A/C only works when idling or not pressing on the gas Sign In

LOL You shouldn't have to stand right in front of it. Don't tempt her.........LOL



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



robertdew76
New User

Aug 3, 2009, 12:27 PM

Post #7 of 15 (1880 views)
Re: A/C only works when idling or not pressing on the gas Sign In

LOL...I will give it a try. Thanks


Hammer Time
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Hammer Time profile image

Aug 3, 2009, 12:29 PM

Post #8 of 15 (1877 views)
Re: A/C only works when idling or not pressing on the gas Sign In

Watch for the center part of the pulley to be turning. The out pulley will always be turning.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Loren Champlain Sr
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Aug 5, 2009, 1:49 PM

Post #9 of 15 (1869 views)
Re: A/C only works when idling or not pressing on the gas Sign In

Hammer; I'm not an A/C guy, but what about loss of vacuum to the blend doors? Just a thought.
Loren
SW Washington


Tom Greenleaf
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Aug 5, 2009, 3:13 PM

Post #10 of 15 (1866 views)
Re: A/C only works when idling or not pressing on the gas Sign In

Another guess w/o pressures posted. This can be the results of overcharged system. Has it been messed with refrigerant wise since it last worked properly?

T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 5, 2009, 8:51 PM

Post #11 of 15 (1855 views)
Re: A/C only works when idling or not pressing on the gas Sign In


Quote
Hammer; I'm not an A/C guy, but what about loss of vacuum to the blend doors? Just a thought.
Loren
SW WA


That's why I asked the temp question. Vacuum can't effect temp since the blend doors are electric.



Quote
Another guess w/o pressures posted. This can be the results of overcharged system. Has it been messed with refrigerant wise since it last worked properly?


The pressures aren't going too matter much if the compressor isn't running and we haven't been able to determine that yet.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Loren Champlain Sr
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Aug 6, 2009, 10:04 AM

Post #12 of 15 (1846 views)
Re: A/C only works when idling or not pressing on the gas Sign In

Electric blend doors? Told you I wasn't an A/C guy. LOL. What will they think of next? Geeez. Had a '49 Cadillac in with hydraulic power windows and top. We got 'em all working. Nothing should suprise me, anymore.Unsure
Loren
SW Washington


Hammer Time
Ultimate Carjunky / Moderator
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Aug 6, 2009, 10:13 AM

Post #13 of 15 (1843 views)
Re: A/C only works when idling or not pressing on the gas Sign In

Ford and some GM's have been using electric blend door motors for over 20 years. The mode and recirc doors are the only ones still using vacuum.

This particular one is a cable though.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Aug 6, 2009, 10:16 AM)


Tom Greenleaf
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Aug 7, 2009, 1:20 AM

Post #14 of 15 (1831 views)
Re: A/C only works when idling or not pressing on the gas Sign In

Face it Loren and speaking for myself, by the time I get my head that far up under a dash to see what's used you need to call 911 for the "jaws of life" to get me back out - LMAO. Ain't gettin' old fun?

Yes - hydraulic window motors, vacuum wiper motors, door locks, trunk releases and the list goes on!

T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 7, 2009, 1:28 AM

Post #15 of 15 (1827 views)
Re: A/C only works when idling or not pressing on the gas Sign In

Man! You guys must be out there...............LOL

I dealt with the vacuum wipers but the other stuff is even before me.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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