SR20DET Crank Start then dies... Looked everywhere

[Thrasher068]

I Have a built SR20DET engine, AEM ECU, Turbo, FMIC, I Have spark, fuel, and no leaks at all. I start the car up and it starts fine... a few sec later ir goes from 1200 RMP to dead. Every time. I check the plugs they are not soaked, timing is dead on, MAF working properly, CAS disk replaced, and ECU had been programed correctly, need to get final tune on a dyno but thats later. It should start and at least run on the crappy tune. I cant evenn put my foot on the gas without it cutting off it actualy make it die quicker

[takae86trueno]

did you check if your fuel relay is still in good working condition?

[Thrasher068]

Everyting on it is new except the CAS, IACV, Coils and ignitor. Found the problem thanks to getting an AEM ECU though!!!!

My Ambian Tempature Sensor was bad making the computer think it was -50 degrees out. I changed the default failsafe to 75 degrees and it starts right up!!!!! Idles high, dumps fuel but hey cant complain about a running paperweight now can i

[chicos240]

Have you tried unplugging your tps?If your vacuum and boost is solid and it starts, then i cant think of anything except TPS or IACV.