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Large drop in idle rpm when AC is turned on 900 93

posted by  someone claiming to be Richard Swartz on  Mon Dec 11 04:33 CST 2000 [RELATED]

Hello and help,

93 940t

Problem: When the ac is engaged the idle drops to about 450-500 rpms and does not return to normal.

I have set and reset the base idle. I have replaced the idle air valve as well as the TPS. When the AC is off the car runs fine. When the AC is on It often feels as it wilol stall but never does.

I have 2 other volvos. each idle at 750-800 rpms, when the ac is engaged the idle rises to 900-920 rpms.

Does anyone know why the 940 T will not do the same?

thanks,

Rich





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