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air conditioning


alesco
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I just converted the air condiniong on my 88 to R134, but I still find it struggling to cool off the car in 95 degree weather. It's almost okay if I drive continuously at 45mph or better, but at stop and go, it's almost to the point where I have to open the windows to keep cool. Does anyone have an idea of what else might need to be done?

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Had to turn mine up to 72 yesterday because got too cold inside (on a sunny Central Florida summer day 8*). Also an 88 converted to R-134A. <P>Are several postings with details in recent past including one where I recorded outlet temperatures (AFAIR 64 degrees on HIGH fan at hot idle at long stoplight and 52-54 degrees at 60 mph. 94 degree day.)<P>Three things I know of can cause poor cooling particularly at idle:<P>1) LO engine fan not coming on - 88 has a ballast resistor, you might try jumpering to HI all the time.<P>2) hot/cold diverter rod stuck (servo is in programmer behind glove box). <P>3)Botched conversion. You only use 80% by weight as much R-134A as R-12 (too much is not cool) and proper flushing first is essential. I also use variable oriface expansion valves in my cars for improved idle capacity though some will disagree.<P>Have three vehicles converted to R-134A now - 88 Reatta, 90 Bonneville, 92 TranSport) - all 3800s and all work fine. It does take a few minutes to really cool off a hot car but temp just keeps going down.

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