My heater used to work great in my car, but after I put in my Tmoss lower intake I noticed that it doesn't work worth a crap now. The temp gauge goes up to what it should and the car warms up normally, but the heater only blows out lukewarm air at its very warmest. I don't have any antifreeze puddling inside the car, no windshield fogging, and the antifreeze level in the car is good. What could be causing this? Any ideas would be great because it's pretty f-in cold outside!