Quote:
Originally Posted by critical
how are you sure what the actual temperature is? won't intake temperature be warmer than ambient? these are two different sensors and one is just for the clock.... does air fuel ratio adjust based on temperature anyways?
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As stated, I had two digital thermometers and the dash agreeing on the ambient temp. I get IAT from the bank 1 MAF via OBD.
I would expect IAT to be above ambient when the car is running but I had let the car cool overnight. I'm assuming everything had time to equalize over the 9-10 hours* that it sat there. I could be wrong.
The "clock" sensor is mounted in front of the radiator, just a little off-center to the right.
I'm not an expert on engine control by any means, but, from what I've read, the MAF uses IAT to compute MAF and the ECU uses IAT to adjust how much fuel is injected. I wouldn't be surprised to find out that IAT is involved in valve and ignition timing calcs. How much of an effect IAT has, I don't know. Which is the reason for the original question. I suspect the answer is "Not enough to matter in your DD" but would like to get some advice from someone that knows more than I do.
Edit:
*I didn't pay attention to the time. It was probably closer to 12-14 hours.