AC wont come on at idle

Reply Subscribe

Thread Tools

Search this Thread

Jul 22, 2009 | 09:54 AM

6.0vortecchevy

Thread Starter

Teching In

Joined: Jul 2009

Posts: 12

Likes: 0

AC wont come on at idle

Well im from over at ls1trucks but no one there could seem to help me, so ill give it a shot here. My problem is when ever I come to an idle my ac shuts off. i checked the pressure and everything checks fine there and all the connections are good. The only way i can make the AC run at idle is if i go into real time tuning and lock the ac compressor in manualy. Any thoughts guys. O and my idle is set at around 700.

Jul 22, 2009 | 11:25 AM

fleetmgr

TECH Addict

Joined: Jun 2009

Posts: 2,012

Likes: 0

From: Tulsa, OK

When you say it won't come on, do you mean that the compressor clutch will not engage or something else?

Jul 22, 2009 | 11:37 AM

6.0vortecchevy

Thread Starter

Teching In

Joined: Jul 2009

Posts: 12

Likes: 0

yea the clutch disengages at idle. but once i get the rpm's above 1k it will engage agian.

Jul 22, 2009 | 11:42 AM

fleetmgr

TECH Addict

Joined: Jun 2009

Posts: 2,012

Likes: 0

From: Tulsa, OK

Take the clutch straight to the battery, and see how it behaves then. If it still won't engage, make sure the battery is good. If it is, replace the clutch.

Also, check your alternator output.

Jul 22, 2009 | 11:45 AM

6.0vortecchevy

Thread Starter

Teching In

Joined: Jul 2009

Posts: 12

Likes: 0

well is it the same if i can lock it with efi live. since it does lock when i do it with the tuner.

Jul 22, 2009 | 11:49 AM

fleetmgr

TECH Addict

Joined: Jun 2009

Posts: 2,012

Likes: 0

From: Tulsa, OK

HMMM! Well, you wouldn't think it would make a difference, but I'd check all the same just to eliminate possibilities at this point.

Jul 22, 2009 | 11:50 AM

6.0vortecchevy

Thread Starter

Teching In

Joined: Jul 2009

Posts: 12

Likes: 0

so what your say is run a wire from the compressor to the battier and see if the compressor kick on then.

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Jul 22, 2009 | 11:57 AM

6.0vortecchevy

Thread Starter

Teching In

Joined: Jul 2009

Posts: 12

Likes: 0

Now if it does work, can i keep it that way or is this just for testing.

Jul 22, 2009 | 11:58 AM

#10

fleetmgr

TECH Addict

Joined: Jun 2009

Posts: 2,012

Likes: 0

From: Tulsa, OK

Testing only!!!

Jul 22, 2009 | 12:00 PM

#11

6.0vortecchevy

Thread Starter

Teching In

Joined: Jul 2009

Posts: 12

Likes: 0

Thats what i thought lol. ill go do that right quik.

Jul 22, 2009 | 12:14 PM

#12

6.0vortecchevy

Thread Starter

Teching In

Joined: Jul 2009

Posts: 12

Likes: 0

okso the compresser kick on when i hot wire it.

Jul 22, 2009 | 12:18 PM

#13

fleetmgr

TECH Addict

Joined: Jun 2009

Posts: 2,012

Likes: 0

From: Tulsa, OK

OK, now that you've had to disconnect and reconnect the compressor, what's it do when you try to operate normally - same thing?

Jul 22, 2009 | 12:20 PM

#14

6.0vortecchevy

Thread Starter

Teching In

Joined: Jul 2009

Posts: 12

Likes: 0

yup right when i put it in back the regular way it went back to what it always did.

Jul 22, 2009 | 12:33 PM

#15

fleetmgr

TECH Addict

Joined: Jun 2009

Posts: 2,012

Likes: 0

From: Tulsa, OK

OK...I see in your OP that you've been inside the computer. Do you have a tune in it? If so, what happens when you go back to stock?

Also, need some vehicle specifics.

Jul 22, 2009 | 12:36 PM

#16

6.0vortecchevy

Thread Starter

Teching In

Joined: Jul 2009

Posts: 12

Likes: 0

well its a 00 2500 6.0 chevy and if i went back to the stock tune it bearly runs. And does the same thing.

Jul 22, 2009 | 12:47 PM

#17

fleetmgr

TECH Addict

Joined: Jun 2009

Posts: 2,012

Likes: 0

From: Tulsa, OK

Well, then I'd suspect a wiring issue in the dash. Something making intermittent contact, like maybe the blower switch. Possibly a wire touching something, and vibrations at speed making it not touch...something like that.