Just put a new compressor/rcvr dryer on a 90 Grand Marquis. Filled it up with the required oil first, then put two more cans of 134a in. Cools just fine but the high side is running around 400-450. Keep in mind that's at 99 degrees ambient with 90% humidity and the car standing still w/engine about 1500 rpm.
Is this too high? If so, any possible causes? Bad compressor?
Is this too high? If so, any possible causes? Bad compressor?