I have a 93 F-150 and I am 99.9% sure my freon leak is in my evap core. Reasons to suspect it
1 I have tried the green alien blood stuff and can't find the leak anywhere.
2 and this may be totally unrelated. I have in the past not long after an attempt to refill smelled a foul odor in the cab.

Does that seem logical that THAT would be where my leak is? Also. How do I need to attack removing the evap core. Do I have to take apart the dash or do I take it apart from out side? LOOKS like in the diagrams I have seen it is mostly outside with 1 or 2 screws to remove from under the dash to get the AC box that houses the evap core out. Is that right?

 

Also, once removed, How would I test to see if that was where my leak was coming from? How could I test a salvage yard one before comitting to it?

 

I'm not sure on the removal but for the testing use compressed air and soapy water.

 

Thanks

 

It comes out under the hood. Remove the inner fender for better access. A new one is like $60, don't waste time with a junkyard one. Mine came from the junkyard, and it leaks. But mine was a no a/c truck so I go everything from the junkyard to have the full system and repair from there. I just never finished repairing.

 

Thanks. I think I saw looking through ZNet instructions and better diagram. It is one screw in cab to remove the box the rest are outside. And unless I can tell it really necessary, guess which one screw ISN'T going back in.

 

I don't remember a screw inside. If there was one it must have been in an easy spot. Your issue is going to be the studs, they screw into plastic and like to back out instead of letting the nuts off.