Quote:
Originally Posted by WEAPON-X
Yes you likely have air in there. IAT2s are almost always within 10* and other than diagnosing air pockets are otherwise a useless PID because the spark map is based on the Manifold Air Temp which is calculated. I have shared a lot of that info here as far as what you guys should be looking at. 
https://weaponxmotorsports.com/blogs...th-a-15-pulley |
I understand that the ECU doesn’t use IAT2 directly, but it is a big part of the manifold air temp calculation as far as I know. But like you mentioned, it’s a good PID to use for diagnostic purposes — which is why I was referencing it in this situation. MAT is what I pay attention to when logging.
That said, does an LT1 even use manifold air temp?