mike13oy
Junior Member
After installing: cai, Mac prochamber h pipe, battery and upload 91 race tune, my ac only blow out at defrost.I change to different mode but ac still blow out defrost. Please help
You've knock off a vaccum line somewhere, Go back and check everthing. The vents use vaccum to open and close them. That is if they work like 99.9% of every car I've worked on.
Check your vacuum lines because vacuum is what pulls those dampers open and closed. Grab ahold of them and run them with your hand and make sure they're hooked up.
HTH
Mike