[rufcar]

I just did my 88 I did the ne compressor last yr in my 90 zr1 also. The compressor wont kick in with too low freon plus as you add it the sensor has the compressor kick on and off frequently as you add freon it slow down. I too had leaks as my 88 is a Challenge car and the ac has not been used in a long time. We found 2 leaks 1 was the Schrader valve itself. The other was the top aluminum supply to the firewall. The O ring was deteriorated . So now I am checking weekly to see if we got them all.