How much r134 does my 1st gen need? Its at 40 lbs now, I'm vacn it down again, I got power to the switch, jumped it and the compressor didn't kick on, I got power to the compressor. Am I wasting my time vacn and addn freon again? What am I missing It don't leak, converted to r134 before I got it years ago, I did replace the heatercore this past fall, but I rechaged it and it was workn

 

are you talking about jumping the low pressure switch. if you jumped that switch and your compressor didnt kick on something is wrong with it.

 

Thanks Tony, if I have too much freon, will that keep my compressor from kickn on too

 

36oz. There a sticker under the hood that says. Thats R12. you have to find the conversion to R134 because i think you need a touch more. not sure though.

 

I did jump the low pressure switch, its got power, but doesn't kick it on. Upon testing, seems its got low voltage, our test light was super dim, every where elde i tested it was bright. What's that box deal on the side of the low pressure switch? Could it be that?Friggin a/c

 

if you have power down to the compressor then there's an issue with the electro magnet that engages the clutch on the compressor. sounds like everything else is ok, overcharge/undercharge condition wont prevent the compressor from cylcling unless of course the low pressure switch is tripped. the block controls refrigerant flow dependent on evaporator core temp. its sole purpose is to keep the evaporator core from freezing over. either way 40 pounds sounds like its still low, depending on your ambient temperature. look up pressure temperature relations chart. say, at 70* outside with the compressor not cycling you should see XX pounds of pressure. check this chart out... www.fjcinc.com/pdf/tprc.pdf

 

If the test light is dim, you have excessive resistance in that circuit. Im assuming you dont have a DVOM so i guess the easiest way would be to grab some wire and run your own power and ground to the clutch. There also should be a spec for the resistance of the clutch. but once again you would need a DVOM.

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Just because we have power doesnt mean we have an adequate ground.

 

High side 120-340
Low 18-47

 

is that ondemand5? if it wasnt so freakin expensive i'd like to get it and look up what ever i please... now the single vehicle licenses arent too bad; just a pain in the gnads.

 

I have access to anything from Toyota to Ford/GM/Chrysler, Mitchell/OnDemand to Alldata/Chilton. Anything. It comes at the price of a college tuition though.