Heres my problem, when the engine is under a load the blower motor for the AC/Heater goes out. If I let off the fuel and coast it comes back on, if I idle it up when sitting it stays on, it's only when under a load. The jeep is an 88 4.0 with the AC converted to R-134. Thank you for any help that you can give.

 

Mine does the same. going down the freeway and im on the gas it will not blow out of the dash vents but will blow out by the windshild. Then I will let off the gas and it will come out the dash. I think it has to do with vaccum.

 

Sorry I couldn't help your problem. But I don't use AC much (1 time on Highway last summer) It got cold, So i never noticed. But I will watch in the future! Thank you.