Here is a strange one that I could not find any threads about. My 93 5-speed runs fine and the AC works fine UNTIL I get up to a decent speed, or am pulling fairly high boost, but normally only at highway speeds. Running the MAX AC usually blows cold air from the from vents. At speed (under load) the air changes to the defroster vents and it sounds like the internal damper that recirculates air in the cabin also opens up. It is still blowing cold from the defroster vents but because the air is coming off the front windsheild, the air feels warm when it hits you in the face. Being in Arizona, the windshield gets freakin HOT!
What is up with that? The other not so critical problem that may or may not be related is that my boost gage does not move smoothly through it entire range. It tends to "jump" a little bit between -15 and -5 psi even though the engine is running fine.
What is up with that? The other not so critical problem that may or may not be related is that my boost gage does not move smoothly through it entire range. It tends to "jump" a little bit between -15 and -5 psi even though the engine is running fine.