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a/c problems
hi.. i need help from you guys please, my 1979 porsche 911 a/c wont get ice cold. i put 2 cans of 134a, and the system wont take 3 cans, it gets up to 60 degrees only, no cooler than that, what can i do to get 45- 50 degrees 3 cans will make it blow hot air, i have to remove a can a total of 2 cans only also front condenser fan not working is that stoping it from getting cold what can i do thank you for the help.
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sylvester |
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08-28-2005, 05:08 PM
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Join Date: Mar 2005
Location: Tucson
Posts: 914
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Do a search on AC. There are lots of threads that go into great detail on this subject.
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1986 Carrera Coupe 1999 Chevy Tahoe 1987 Chevy Blazer 1955 Chevy Apache 3100 Pickup "A little knowledge is a dangerous thing" |
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08-28-2005, 05:43 PM
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Join Date: May 2003
Location: southern California
Posts: 26,964
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Not an expert, but do a search on Jim Sims and you'll find everything you want to know about pcar A/C. Your in Houston so its hot and muggy, you may only get 60 degrees. Are you using gauges? Its possible to overfill you should be getting 19-30 psi on low and 210 to 300 on high side. Search on "A/C Pressures" and you'll find Jims numbers. I thought mine was working OK, but at 105 today, I'm barely getting 48 degree vent temps, I want in the 30's, Jim suggested that I bleed out some 134a. I did a little and may try bleeding some more.
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Hugh |
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08-28-2005, 07:44 PM
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Location: Kerrville, Texas
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sylvester, I suggest you try John at Cool Flow (713-688-7525) in Houston near 610 and 290. He spent a couple plus hours (and only charged me for an hour) to adjust my system a year and a half ago. He's been in business since Packard installed ACs in their cars.
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1987 911 Guards Red Targa, nearing 200,000 miles, lowered, 7's & 8's, 964 grind cams from John Dougherty, A.P.E. Mass Flow Sensor with chip to match, cat bypass, strut brace, dual out muffler. Will consider newer model in 8 years when I turn 75 and then maybe not. 2012 BMW 528i (wife's) 2007 Toyota FJ (rain and off road days) |
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08-28-2005, 09:01 PM
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Try replacing the receiver / dryer with a ProCooler. Between that and changing the refrigerant to Enviro-Safe ES-12a, I went from 60* temps at center vent to 35*!! That is with outside air temps hovering near 100*
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'85 Carrera Coupe, Marble Grey #118 JP/R6 '93 Lexus SC400, '00 Ford F-150 '70 911T- 2.7 (SOLD) |
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08-30-2005, 12:49 PM
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Location: New Jersey
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Yes, you need the front condensor fan to be working too!
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Peace, Ron www.ronorlando.net 78SC Targa 3.2 SS, 964 cams, CIS, SSI's,Dansk Own a gun and you can rob a bank , own a bank and you can rob the world. |
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08-31-2005, 06:11 AM
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fix that fan..otherwise, stop and go situations will be warm. i second or third the suggestion to try a search..tonnnnnnnnns of info on a/c systems on this board. your r-134 system also deoends on a certain amount of oil..you can actually have 'too much' r-134 in your system and cause it to run warmer rather than cooler. you might consider that..you may need to evacuate and start over. i recommend finding a good tech if you don't have experience evacuating refrigerants.
ryan
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To the memory of Warren Hall (Early S Man), 1950 - 2008 www.friendsofwarren.com 1990 964 C4 Cabriolet (current) 1974 911 2.7 Coupe w/sunroof 9114102267 (sold) 1974 914 2.0 (sold) |
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08-31-2005, 06:24 AM
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1974 Porsche 911 2.7
