1st & 2nd Generation (1983–1986 & 1987-1991)Toyota Camry Discussion for years: 1983-1986 & 1987-1991.
Topics of discussion range from fuel economy, safety, modifications, performance all involving America's favorite family car, the Toyota Camry.
Hello everyone, im having some trouble with the a\c on my 1991 camry 2.0, the a\c had a problem where it would kick off and on rapidly, it wasnt just cycling, and the car wasnt cooling down inside, after replacing just about every component, (after 3 compressors) we replaced the expansion valve and the kicking off and on problem finally, finally finally went away, okay now here we are, the system works properly, the car even idles up properly when the compressor is turned on, only problem is the a\c is not cool, when its 100 degrees outside the air is still about 70, compared to my taurus which has 35 degree air when its 100 outside, there is a possibility that this compressor has gone bad too, (another long story) but basically could anyone tell me exactly how much pressure i should put in the system? and how many psi should be at the low side and high side? and when i vacuum the system out, how many negative pounds should i be at? also is it possible that i have too much oil in the system? and by the way, this is a R12 system that has been converted to 134a, any help would be greatly appreciated, this a\c has been so elusive
Well thats the thing, i am a mechanic been working on cars sense i was 8, and this car has been to two private shops that are held in high regard, and its also been to a toyota dealership in southern california and to one in northern california, this problem has been very elusive
You sound like you know too much about A/C systems to be asking this on a public forum on the internet xD
One would assume that if the air is not cold but the system is running fine, that it would simply need a re-gas, but that's just my very basic knowledge on A/C lol.
Not expert at automotive AC but I did have an 89 Camry 4 cyl that was converted to R134a like yours. Around Boston, max temp is about 95 F. AC compressor ran much longer to attain the discharge temp of 40 F and on 95 F day, compressor would almost never shut even using Recirc Air mode. Even on milder days, noticed that compressor needs to run longer than when using the R12. I have read that there is reduction in cooling capacity when converting to R134a. I run in Recirc all the time when using AC and outside temp is above 75-80 F.
Well yes i may know too much to be asking this in sucha public forum, but you just never know when someone might know something you dont, or remind you or something your over looking, but anyways yes 134a is 14percent less efficient and cars that were built to use 134a originally have higher capacity systems to make up for it, so thats why some systems that were built for R12 dont run so well on 134a, the camry doesnt seem to mind too much though, but either way its about to get to 120degrees here, so i need to get this thing cooling, thanks for all the advice so far
Well we did just actually replace the expansion valve, and that fixed the problem with the compressor kicking off, but now there just isnt alot of cold air, and the only thing we can guess is that the compressor is working right, because it had been over pressurized at one point
Mine has also been converted to the r-134 or whatever im not very smart bout a/c but i talked to one of my mechanic connections beacuse mine doesn get that cold either.. he says that the lil radaitor for the air conditioner isnt big enough because the car was built for the old stuff and the old stuff got colder easier.. this new coolant runs warmer and takes more to get cold. he suggested that i put a large pc fan of some sort in front of it so when im not driving down the interstate it should keep it a little cooler.. but idk.. im still striving for a better answer....
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"Not Only Is It A Camry........ Its Faster Than You!!"
1991 Toyota Camry 2.0L 3S-FE (Future Tuner)
Yeah well its not true in the camrys case that the condensor (thats the little radiator your talking about) isnt big enough, i can tell you this for a fact because after we had our camry retrofitted to 134a due to a small leak that had to be fixed and the system charged, well after that during a 125 degrees summer here in southern california in the imperial valley, that camry was blowing 40 degree air out of its vents, thats a 85 degree difference, almost seems like its over cooling huh? either way the system can function fine in any weather conditions with the 134a if the whole system is functioning properly, but anyways im the one asking the question here, and im here just answering questions and giving out information, come on someone that knows more than me, lets brain storm!
Yeah well its not true in the camrys case that the condensor (thats the little radiator your talking about) isnt big enough, i can tell you this for a fact because after we had our camry retrofitted to 134a due to a small leak that had to be fixed and the system charged, well after that during a 125 degrees summer here in southern california in the imperial valley, that camry was blowing 40 degree air out of its vents, thats a 85 degree difference, almost seems like its over cooling huh? either way the system can function fine in any weather conditions with the 134a if the whole system is functioning properly, but anyways im the one asking the question here, and im here just answering questions and giving out information, come on someone that knows more than me, lets brain storm!
well i just had this mechanic over look the whole ac system and everything is working fine... and my ac gets colder wen im driving down the interstate but when im in town it isnt cold barely... and the reason i was coverted is because i had a new compresor put on a bout a year ago when my boss owned the car....
__________________
"Not Only Is It A Camry........ Its Faster Than You!!"
1991 Toyota Camry 2.0L 3S-FE (Future Tuner)
Well in that case your mechanic over looked something, or your system for some reason cant cope with 134a, you either need to install a over sized condensor, or a bigger fan, or put a puller fan in the front, or do it all, if the system does have a weak link its the small condensor
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