Monday, March 04, 2013 - 12:38 pm, by: Matthew Sharpe(Madmatt)
My UZZ30 was a bit like that. My JZZ31 has never done it though (and the aircon is colder too!) I just assumed it was caused by a primitive/inefficient compressor in the older car compared to the newer one.
They use the same series compressor, UZZ30's have a larger displacement compressor and have more airflow through the condenser at idle so if anything the V8's should get colder when both cars systems are in the same condition and working properly.
The idle should not drop. If anything it should increase or stay the same. You'd want to remove the A/C Fuse and then Turn the power for the A/C On, note if your Idle increases or nothing at all.