Quote:
Originally Posted by Pont406
I had the truck on chasis dyno thats how I know it looses power.
My ex was over tonight and she found another problem with the heater. My fresh air flaps were open. I was able to close right flap but left flap is broken. I need to close it and see what happens. I believe that a mounting is rusted out.
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The vent flap is hanging half out on the driver's side and probably binding. If you can re-install the flap (looks like the bottom pin) it might close. Also, you may have trash/leaves packed around the heater core not letting air through. 160 should still be enough to heat at 40 deg.