Quote:
Originally Posted by Peturbo
Heat from A/C condensor is effecting your IAT temps. higher IAT temps means less dense air; less dense air means less oxygen to fuel combustion.
That combined which energy loss from running a/c compressor you get quite of bit of energy loss. Seems normal to me.
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But isn't it kinda weird how the heater is also impacting his performance? If you have A/C off but you are blowing hot air, it shouldn't slow the car down. In fact, cabin heater works as a small radiator for the engine, which helps with engine cooling.