[VAC] Re: Help--A/C while towing

[john dorsey <jrdorsey@xxxxxxxxxx>]

Dan,
Fancy cars like caddys and lincons have a check valve and a vacuum
reservoir to keep that from happening. I would think that an '86 caprice
would be high-end enough have that setup also. You might check and see,
as the check valve may be bad (one good backfire can kill one). If you
don't have one you can add one, you have to install it in the vacuum
line that goes ONLY to the a/c, and the line has to go through it (in
one fitting and out the other) not just teed into the line. 

Another thing to look at is that the diaphragm in the actuator may have
a hole in it. If it does a reservoir and check valve won't stop the
problem just delay it shortly.

An '86 probably does have a compressor cutout at full throttle. It can
be disabled but will cut back on your available power.