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I just finished my Iron LS1 and have it installed. The IAT reads between 250°F and 280°F. I am pretty sure this is what is making it run extremely rich. Tried a new maf sensor and same results. So I am thinking a wiring or tune issue. Any input would be helpful.
P.S.> Have not had time for much diag. have to go to a wedding tonight at 7.
Do you happen to be getting p0171 and p0174? I'm having the same issue but I don't know what my iat's are at.
The only code I have is a random misfire from how rich it is.
Probably bad wiring, I know when the wiring is open, it'll read -30 or so, might be a shorted wire.
I leaning towards a wiring issue. Will have more time to diag. tommorow.
fixed it, found several wires were pinched under the coolant tank.