Re: My Air Conditioning Problem

["content22207" <brobertson@xxxx>]

You can't really diagnose A/C without a pressure gauge (you don't need
the full manifold set -- just a single gauge on the low side is fine).

You may also need to jump the compressor to force it to spin during
diagnosis (the DeLorean has a pressure cutoff switch).

Take a reading with the system at rest. Should be 100 - 110 lbs. Less
-- you may need freon. More -- your system may be overcharged.

Get a good refrigeration cycle started (in a converted R12 system this
often requires more air flow across the condensor than the fans alone
can provide -- drive the car just a short distance). If your low side
isn't ice cold & sweating, you don't have a cycle.

Take another reading (cycle still going). Should be 30 - 45 lbs on the
low side.

If your stabilized pressures were OK: higher pressure usually
indicates an obstruction in the system (can be ice -- always pull a
vacuum before charging it). Lower pressure is more common, usually an
honest to goodness freon leak, a stuck expansion valve (orifice
tube?), or a dying compressor. 

BTW: you CAN do your own auto A/C in the driveway for $50.00 or less.
This includes flushing and vacuuming the system (you use the engine
itself). Contact me for details. 

Bill Robertson
#5939

>--- In dmcnews@xxxx, "vrvader" <dclark@xxxx> wrote:
> Air conditioning problem
> I have run into an air conditioning problem with my D. In Arizona 
> this is a definite problem. Based on the symptoms below does anyone 
> know what my problem may be? Things to note, it does not have the 
> original blue relay and it has been converted to 132a. 
> 
> Thank you all for your time in this.
> 
> Symptoms
> 
> ---Engine is cool (fans not on when air is off)---
> * At idle when the air conditioning is turned on the auxiliary fans 
> and the compressor turn on and stay on.
> * At 2000 RPM when the air conditioning is turned on the fans and 
> compressor cycle on and off in about one to two second intervals
> 
> ---Engine is warm (fans are on when air is off)---
> * At idle when the air conditioning is turned on the auxiliary fans 
> and the compressor turn on and stay on.
> * At 2000 RPM when the air conditioning is turned on the auxiliary 
> fans and the compressor turn on and stay on.