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Cadillac
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6 Posts
Discussion Starter #1
During heavy acceleration or speeds around 80+ the A/C pump shuts down until loads or speed is reduced. Then it returns to normal.
 

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03 Escalade, 06 SRX
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6,888 Posts
Welcome to the forums. I moved your thread to the Deville section from the lounge. The lounge is for off topic discussion or to stop by and introduce yourself to other members here. Good luck.
 

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03 DTS
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225 Posts
Most likely needs a can of 134A added to the system. There is a low suction pressure cut out switch on the AC and the faster the engine runs the lower the suction presasure goes. If the system is a little low it can cut out under higher RPM's.
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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86,975 Posts
You don't need to add anything. The PCM disengages the compressor under WOT on the assumption that you want maximum power. It's normal.
 
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