Its hot, yet another AC thread!

[NotSoSlowSHO]

After 8 years of owning this '89 SHO, Im finally getting the AC working. It has never worked since Ive owned it.

As far as I know it was never changed over to R134.

I started by replacing the schrader valve stem cores. The one on the Low side had an obvious leak. The small o-ring was toast.

So the system has been "open" to atmosphere for a LONG time.

Thinking I might get lucky, I picked up a generic R134 Retrofit kit, that included a can mounted gauge.

With the system being 100% empty of any charge, I had to use a jumper wire on the the pressure switch to activate the compressor and allow it to take a charge.

2 cans later (28oz) I have 60 degree air coming out the vents, in 85 degree ambient.

But I think the compressor is cycling too fast. Engage and disengage of the clutch every 6-8 seconds.

Is this too fast? If so, what do you think is the problem? And better yet, how do I fix it?

I know this is far from the "proper" way to do this retrofit, but I really dont want to spend much money on this.

I really just want an AC that works, and doesnt blow up.
Im perfectly happy wit 60-65 degree temps out the vents.

Thanks for any help.:wave:

 

[kevinspann]

You really should have vacuumed the system down and checked for leaks (i.e. does the system hold a vacuum)

It may work for a while, but who knows if you have enough oil in there. R12 oil isn't carried through the system like the oil for R134. I think that charge may be too low, but I'm not 100% sure.

The o-rings aren't really compatible either.

 

[luigisho]

Lots of potential weak points with it having been unused for so long. Let's see what a gauge reads with this charge, add if necessary, and check again to see if any or how much has leaked out. It's hard to get a dead system working on the cheap but I understand trying some shortcuts first. Orifice tube changed? If you're lucky a few o-rings and a good vacuum to **** moisture in the system could do the trick. ..or not.