a/c surge?

mustang_montana

Member

Jun 20, 2005

137

0

17

Apr 27, 2009

#1

• Apr 27, 2009

• #1

in my 88 convertible, n/a, when i turn the a/c on the idle will jump up about 500 rpms when the compresor kicks on then go back down. itll keep doing it until i turn it off. another thing is it only blows cold when the car is moving usually, at stop lights it is pretty warm. first guess is low refridgerent or a bad compressor clutch, any ideas? thanks guys

 

Dr_EluSivE

Founding Member

Apr 24, 2002

2,155

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56

Central Illinois

Apr 28, 2009

#2

• Apr 28, 2009

• #2

Probably low coolant, if the compressor cycles constantly then the coolant is low, the other reason for being warm at stoplights is a weak radiator fan. When i upgraded my radiator ran to a high flow unit my air stayed cold at stoplights. Till the compressor went out anyway...

Dr.

 

BlownFiveLiter

have car, will race....wait, it doesn't run

15 Year Member

Nov 29, 1999

3,133

18

108

Chicagoland

Apr 28, 2009

#3

• Apr 28, 2009

• #3

Dr_EluSivE said:

Probably low coolant, if the compressor cycles constantly then the coolant is low, the other reason for being warm at stoplights is a weak radiator fan. When i upgraded my radiator ran to a high flow unit my air stayed cold at stoplights. Till the compressor went out anyway...

Dr.

Click to expand...

Refrigerant. Otherwise, that's dead on.

 

mustang_montana

Member

Jun 20, 2005

137

0

17

Apr 28, 2009

#4

• Apr 28, 2009

• #4

cool thanks, think i still got r12 though. guess ill have to dump it and switch over.

 

BlownFiveLiter

have car, will race....wait, it doesn't run

15 Year Member

Nov 29, 1999

3,133

18

108

Chicagoland

Apr 28, 2009

#5

• Apr 28, 2009

• #5

R12 is still available, but very expensive and most shops won't charge a system that's even suspected to be leaking because of it being a CFC refrigerant. Although it's related to the 5.0 AC system instead of the 2.3, this contains pretty much everything you need to know to convert over to R134a, if you're interested: http://forums.stangnet.com/559388-134a-conversion-kit.html