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Old 08-13-2006, 02:31 PM
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91 olds air conditioning recharge, add a fan or compressor

Hi people....I dont have a lot of experience with a/c, heres the prob........it has 134a in it........which sucks, wish I had r12...anyway when at a stop light it doesnt blow very cold as in the cooling fan only sucks air through half of the radiator..........so I know a cooling fan for the other half would help.....when I am driving around it takes a while at cruising speed to even tell if the ac is working as in temp of air coming out of vents.........I did add one of those high mileage r134a kits to it and it helped a little.........made low side pressure 50 pounds...........how do I tell if I need to replace the compressor or orfice tube filter if there is one?.......gimme all ya got people I wanna get this a/c the best it can cool......also when I do get a fan for the other half of the radiator, what type should I get....one that mounts on the condenser side or try to fit one between the radiator and engine..........I dont know if its advisable to get one and reverse the polarity to make it spin backwards and mount it on the condenser side

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Old 08-13-2006, 03:03 PM
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134 is good stuff in most cases. You really need to know the high side pressure too to properly evaluate the system. Oil flooded evaporators is common in GM vehicles. Plugged orifice tubes is common too. Worn out/leaking compressors are common on higher milage vehicles. Accurate readings inturprited by an experienced tech will help find the problem. Just adding more freon may do more harm than good.

A single factory fan on a properly working system is usually fine.
Might be time to bite the bullet and have it checked out by a pro.

Mark
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Old 08-13-2006, 04:45 PM
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Ditto on what Mark said...to properly diagnose it, you need at least a good set of gauges so that you have the high pressure side reading as well. Offhand and just guessing, Id say the problem is most likely not having enough air moving across the condenser, as R134a systems usually work best with larger components than R12 systems, so cooling off the condenser is even more critical. Hope this helps
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Old 08-13-2006, 05:27 PM
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yea I do know why it doesnt cool as well at a stop sign....half the air flow so I will be adding a fan for the other half or the radiator and condenser........also I noticed that there is a big space on one side of the cooling fan that is open that draws air from the engine compartment instead of throught the radiator....gotta seal that off as well as the spaces between the radiator and condensor that need foam or something......not sure what I am gonna use to seal all these air leaks
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Old 12-18-2012, 12:51 PM
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old post but interesting information

its an air problem.
all that GM bashing is nonsense. one could say the same about Fords or any other brands and models... they all have their goods and bads.
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Old 12-18-2012, 01:04 PM
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I don't want to be rude...I did the same thing when I first started here on the forum and i see you only have 2 posts but, the thread is almost 6 1/2 years old.

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Ray
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Old 12-18-2012, 05:29 PM
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yeah and?

im well aware, im offering info to ppl who might need it still, doesnt matter what u personally think... theres others who might need it still. not to be rude .
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Old 12-18-2012, 05:39 PM
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Okay, just sayin...I didn't know you knew....sorry
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