On my (93 F350) 7.3L the AC blows like the vent. I don't hear it engage either..I looked at the compressor and there's a wireing harness with a small push type plug laying on top, not hooked to anything. Anyone have a clue where the compressor hooks up at and anyway to test the system to see where my troubles might start? Any advise where I can start trying to find out what's wrong?

 

That connector is probably the one for the clutch and it should plug into the clutch coil. You may have a little problem finding the coil side terminal but you should be able to find it. My concern is to why it is unplugged, unless it was by accident. Have you owned this truck while the AC worked? If not then I would suspect that somebody unplugged it because the clutch or compressor is shot and it was causing a fuse to blow. If you plug it back in then you can start troubleshooting the problem, if there is one. Start with attaching gauges and determining the freon pressures on the high and low sides. Let us know what they are at idle and at 1200 rpm.

John

 

I am tempted to bet (if the truck was a recent buy) that someone unplugged the compressor in an effort to save fuel.

As we all know, with the computer being rather intelligent, that is pointless.

That harness should plug in on the upper rear of the compressor...it does in the Ranger.

 

lonnie, here are some shots of the ac clutch hookup on my 88. it should be the same as your 93.
hope these help ya.


http://i41.photobucket.com/albums/e2...nsport/ac2.jpg
http://i41.photobucket.com/albums/e2...nsport/ac1.jpg

 

TC great shots, just what I wanted to see. This weekend I go out and play around. I traded with my oldest son. He got my newer Ranger and I got his F350. He doesn't remember anything about the AC if it worked or not. He didn't drive it much (hence what it's now mine) but used his newer company truck. But you all seem right that this is the clutch plug...I guess I can at least try and plug it in and see what happens. Then try a step by step check TJC, I noticed right behind your AC unit the Turbo Breather filter. Mine dose not have one...my hole hose is gone...can you shoot me a picture on that hose and filter leading into the turbo? I guess I need to contact Banks and buy one...does it hurt not having one?

 

sorry Lonnie, but you are sol on the banks turbo inlet tube. that one is the first step of my home made cold air intake. i bought 3ft of 3 inch aluminum tubing in straight, 1 90º, and 1 45º pipes and 2 3 inch silicon pipe connectors from the local speed shop that supply the ricer crowd, then set them out and did the cut and fit and weld to put it all together, then set a 3 inch cone filter on the end.

next step is to connect the ram intake under the front bumper and plumb it under the battery to a box the air filter will be in.

 

here's the inlet pipe with the cdr attached

http://i41.photobucket.com/albums/e2...ort/turbo1.jpg

here's what's left of the origional air box. as you can see, it has been "slightly modified
http://i41.photobucket.com/albums/e2...ort/turbo2.jpg

 

it must have been yours that I saw the step by step picture process of you doing that set-up to your grill right? Nice job...well I guess I have to find-out what my intake tube should look like and then find one

 

WOW tjc, good job...do you notice a performance change or fuel comsumption change?

 

no Lonnie, that was Dave the pre powerstroke forum moderator that had the in the grill setup you saw.
performance change?? you bet!!

fuel consumption change?? you bet again!!

fuel mileage went down, but the reason for that is i can't keep my foot out of it

 

ok sorry it's been awhile since I read it and it sounds like something Dave would do...that guy is a first class act (not that you're not)..anyway. Can you explain in more detail the changes you made to your system ie, what you had and what it is now..maybe I can add some of your ideas to my system

 

you will see in the pictures the little box over the intake manifold. that is all that is left of the humongous air box that came with the banks kit originally. when i was doing the trans swap, i had to remove the box AGAIN, and after swearing at it and saying for 16 years that i was going to re engineer it before putting it back on for the 5,000th time, i finally did it. i took the air-box to a friends machine shop and chucked it down on the table of a Bridgeport milling machine, and cut off everything except the turbo outlet to manifold intake plenum. (that is about 15 lbs of aluminum) once it was cut down to a nice small package that i could actually work with, i realized that i could now get to the hose clamps that hold the pressure hose on, so it makes removal and install a breeze. all of about 3 minutes now compared to the 1-2 hours before.
next was the intake. a 3 inch silicone adapter hose with stainless hose clamps on the turbo, a 90º aluminum elbow, welded a 45º aluminum elbow, with the cdr valve mounted in the middle of it,and a piece of pipe with a 22º cut in the pipe, with the other 22º cut reversed and welded back on to make a 45º bend, and then the 3 inch K&N air filter.
it is currently wire tied to one of the A.C. lines to hold it in place. i am working on an aluminum box to mount under the battery tray to put the air filter in, then it will be piped out through the radiator support to an intake that will mount under the bumper.
this should give me a cold air ram air intake.

 

wow, so this set-up is on your 79 (I assume) and you modified the Banks stock turbo...I would love to see it close up (in person) but with us on opposite sides of the US not likely..anyway, maybe I can entertain something like that one day..

 

nope. its on the 88, "the rattletrap"

 

well I found the problem!!! It's a little embarassing...even though I might not have found it so quickly with-out the photos...soon as I saw them I look right ate where it should have the power plugged in and guiess what? The plug came out and the system wasn't even plugged in! Actually the female lpug on the compressor is broken and it won't hold the make part snugly. I'll have to rig something up but now I have cold air!!! Yee haw. Thanks all for your help. Man I was almost ready to pay to have someone look at it..phew thanks all!!