Someone help!! Starts up but turns off in 1 sec

I just started up the LT1 engine in my RX7 but I'm having an issue. The engine starts up but only stays on for about a sec then turns off. Even when I have the throttle 1/2 open it'll idle high then turn off. I'm thinking it's a computer problem seeing how it just turns off no matter what throttle I give it. I don't have the O2 sensors in yet but I think it should still idle. Would an LT1edit tel me the prob?

Did you disable VATS?

MAF connected?

MAF is connected and VATS was deleted from PCM

is your MAP sensor installed?

it is installed but wheather it's working or not is a different story. My freind had a map sensor go out but it still ran, just like crap

Codes?

A big vacuum leak will do this.

Rich Krause

how about that big rubber thing that a pipe is suppose to stick into? It's on the driver side that I think goes to the valve covers. Could that cause a vacuum leak? Mine is not plugged

OK, I found that and the low oil sensor was broken completly off. Could the PCM be sensine no oil pressure and turn the engine off?

Originally posted by LT1RX7
OK, I found that and the low oil sensor was broken completly off. Could the PCM be sensine no oil pressure and turn the engine off?

It could if there was a wire going from the sensor to the pcm, but there isn't. The only wire coming from the oil pressure sensor goes to the gauge.

when you turn the key to the on position just so you have power from the battery, does the SES light flash or do your fans turn on?

the SES light goes on but does not flash. I found that the hole in the intake is for the PCV or something

Are you using a Camaro or Corvette computer?

I just did a swap using a Vette computer and I'm having the same problem. I have used Camaro computers with no problem. The VATS system ties into the Vette PCM in a different way.