R12 or R134a?
Thread Starter
Intermediate
Joined: Feb 2005
Posts: 47
Likes: 1
From: Houston Texas
R12 or R134a?
I have a '95 LT1 6-Speed with HVAC / California emissions.
Did these cars come standard with R12 or R134a, and how do you tell?
I want to recharge the system but want to be sure that I do it right.
Thanks in advance.
Did these cars come standard with R12 or R134a, and how do you tell?
I want to recharge the system but want to be sure that I do it right.
Thanks in advance.
Thread Starter
Intermediate
Joined: Feb 2005
Posts: 47
Likes: 1
From: Houston Texas
Thanks alot.
I am intermittently throwing a H67 code; something is wrong with the clutch circuit or the sensor.
If the gages show the refrigerant pressure is good, and I know the clutch is working (when there is no H67 shutting down the system it does click in and out), then I intend to replace the HVAC if I cannot find an AC request signal at the HVAC unit. I didn't want to go thru all the trouble to tear the dash apart to get at the connector on the back of the HVAC if low pressure was the problem all along.
If I do find an AC request signal at the HVAC, but no feedback on the pressure sensor, then it is probably a broken wire or bad connector somewhere...fun to find I'm sure.
I have never had a problem of any sort with the HVAC before now, and it may just be the time for a recharge.
Has anyone had experience enough to know if I am making sense in this procedure?
Thanks again.
I am intermittently throwing a H67 code; something is wrong with the clutch circuit or the sensor.
If the gages show the refrigerant pressure is good, and I know the clutch is working (when there is no H67 shutting down the system it does click in and out), then I intend to replace the HVAC if I cannot find an AC request signal at the HVAC unit. I didn't want to go thru all the trouble to tear the dash apart to get at the connector on the back of the HVAC if low pressure was the problem all along.
If I do find an AC request signal at the HVAC, but no feedback on the pressure sensor, then it is probably a broken wire or bad connector somewhere...fun to find I'm sure.
I have never had a problem of any sort with the HVAC before now, and it may just be the time for a recharge.
Has anyone had experience enough to know if I am making sense in this procedure?
Thanks again.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
I don't have a Trouble Tree handy, but isn't that a high signal code; ie, pressure sensor return voltage greater than 4 volts (psi greater than 400)? If so - and it's intermittent on hotter days, the system may be restricted, primary or secondary cooling fan problem, poor air flow through the condensor/radiator - monitor/check engine coolant temp when it happens, note speed (idle or cruise). Could also be internal short from reference to signal. Wriggle the sensor harness - tap on it lightly with a screwdriver handle - aim a hairdryer at it, or hell, just buy a new one.
Safety Car
Joined: Oct 2007
Posts: 3,816
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From: :45 minutes from everywhere / E-I-E-I-O
Pull the orifice tube, and check the screen.
Thread Starter
Intermediate
Joined: Feb 2005
Posts: 47
Likes: 1
From: Houston Texas
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Nah - you don't want a new one - dual zone - variable stroke compressor with a critical $2 valve that mucks up (usually right after the warranty goes) and you have to take everything apart to fix it - just replace the Sensor on the one you got.
