wasnt there a TSB for eractic idle when the A/C is on??? i need it cause i have this issue

 

There's one with idling problems but it dont mention the A/C. it's :
http://fr33k.5gbfree.com/06-06-04-039.htm

 

mine does that but only with the a/c on. thought someone had a tsb on it.

 

hmm. Not sure then. Mine does it a bit but it does it on both my cars. My 07 Black with GM stage 2 and with my 07 Red without any mods at all. I thought it was normal so I never taken it in.

 

lol. i dunno if idle going from 600 to 1200 and gradually calming back down when you get off the gas is normal

 

Here is the Irratic Idle TSB

#1854334 = LSJ Fluctuating, Unstable or Incorrect Engine Idle (Reprogram ECM) #06-06-04-039 - (08/10/2006)

Condition
Some customers may comment that the engine idle may fluctuate (idle roll) a hundred rpm for several seconds when the engine is started hot or cold. Further diagnostic investigation with a scan tool may not reveal the cause. No other driveability or performance concerns may be reported.

Cause
The most likely cause of this issue may be that the engine calibrations need to be updated to correct the fluctuating engine idle .

Correction
DO NOT replace the throttle body, the ECM or any other parts
Important:

• Chevrolet Dealers: The ECM calibration is available to dealerships as part of TIS2000 incremental satellite update version 6.5, which was broadcast to dealers on June 12, 2006 or later. For the dealerships that use CDs, they were mailed out June, 2006 or later.

• Saturn Retailers: Before installing the new ECM calibration, make sure the Saturn Service Stall (SSS) version is TIS 6.5 2006 or later.

• While the ignition is OFF, apply the parking brake to disable the daytime running lights (DRLs) prior to starting reprogramming procedures

• The technician must select the "Reprogram" option in order to reprogram the ECM.


Reprogram the ECM with the latest calibration. This calibration, or any that follow, is designed to address this fluctuating engine idle concern. Refer to Service Programming System (SPS) in SI for reprogramming procedures. As always, make sure your Tech 2® is updated with the latest software version

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

J6354
Module, Powertrain Control - Engine Reprogramming with SPS
Use Published Labor Operation Time

 

And if ya watch your boost guage it will also fluctuate up and down with the idling. Wonder if it's just a boost control problem and the extra boost makes it change the idle.