Mechanics

REPLACED SYSTEM, RECHARGED, 2 DAYS RELEAS

1994 Toyota Camry

Air Conditioning problem
1994 Toyota Camry 6 cyl Front Wheel Drive Automatic 140K miles

I recently decided to fix the A/C in the wife's car. I bought new A/C compressor, drier, & xpansion valve. Change everything except the xpansion valve because it involved pretty much takin all the inside out of my car to get to it. Me and a very good mechanic friend (who always helps me on repairs on all my vehicles) flushed the system with the a/c flush while the compressor was off and the drier was off. Then waited over night because it got late and we wasnt sure how much pag oil to put in the compressor. Next day, I called toyota dealership and talked with mechanic to decide on the pag oil, then blew the lines out again with an air compressor to make sure it was clean. Installed compressor and drier back in place, put rest back together. When my mechanic friend got home from work we pulled a vacuum for 30 minutes, then closed the system off for 30 minutes to make sure there was no leaks and then added refrigerant. We got the temp in the car blowing 40 deg. We thought the pressure was high, we had to bypass the compressor switch to turn on the compressor till we got enuf freon in, then it stayed on by itself and we reconnected it. Now here is where we were worried, the compressor never shut off and on like it should have. Now, there was a ground wire that come off the clutch that I Believe was connected to the bottom of the old compressor, I forgot to connect it back to the bottom so we just run it to another ground source on the car (just under the hood near the radiator). Also, I had to buy new spacers for that went btwn clutch and the magnet, there was 3 in the pack but 2 made it where the magnet spun freely. Two days after letting my wife have it back it blew the high pressure line off the back of the compressor and released the pressure.

Any idea's on what we could have done wrong?

parts were bought at O'Reillys Auto, it is 3.0L LE, and it is push button
Avatar
Cajunn69
May 3, 2008.



Where did you buy these parts at? And is you control head for the heater a manual or push button one?

What kinda camery is it? Basic, LE, SE or XLE

Tiny
Buzzsaw
May 3, 2008.

Tiny
Cajunn69
May 4, 2008.
Where did you buy these parts at? And is you control head for the heater a manual or push button one?

What kinda camery is it? Basic, LE, SE or XLE

bought it from o'Riellys
It is 3.0L LE
It is push button

Tiny
Cajunn69
May 5, 2008.
When you had the guages hooked up did you just have a low psi guage or both high and low guage? What were the readings

to replace the expansion valve you dont have to take out the dash, just unhook your outside lines and it comes out in a section. Its actually vary easy. There is a sensor in there also its a evap temp sensor used for clutch cycling try replacing that also

Tiny
Buzzsaw
May 5, 2008.
When you had the guages hooked up did you just have a low psi guage or both high and low guage? What were the readings

answer: we had high and low gauge. We bypassed the switch with a toggo switch so that we could engage and disengage the compressor. While it was engaged the low pressure would stay btwn 20-50lbs and the high pressure would keep rising over 200-250lbs. When clutch was off, for a while they would even out to be the same around 70-90lbs. Once the compressor would stay on and the light went off on the inside we connected the compressor back up. Then the compressor never disengaged.

Question: is the evaporator temp sensor in the same place as the expansion valve or could it be just above the drier?

Tiny
Cajunn69
May 6, 2008.
It should be on the evaporator somewhere, when you remove the peice for the expansion valve you should be able to see the evaporator, the heater box comes out in sections

low psi should be 30 psi to 28 psi and high side should be 175 to 200 psi no more

50 on the low is too high, too much freon it says on the dryer how much freon to put in

Tiny
Buzzsaw
May 6, 2008.
Ok awesome, I will try that thursday and post again on the results. Thank you for all your help

Tiny
Cajunn69
May 6, 2008.