Cold engine dies right away

[BIG_KID]

bone stock 5.7 initial cold starts up then dies right away. Restarts then runs fine. Does this almost every time when cold, starts/runs fine when warm. Any advise

 

[GL1500]

I just had this happen yesterday when temps were around 10*. I found I could keep it running if I kept my foot lightly on the gas. Happened twice then next time I went to start it it idled and ran fine. I figured it might be the throttle position sensor going south so next time it wouldn't start I rapped on the TPS and wiggled the wires and it's been fine since. Ran fine today but I can't trust it so I'll pick up another soon.

Best wishes

 

[BIG_KID]

TPS on mine is new and set at .5VDC

 

[jkeaton]

I'd suspect the IAC.

 

[BIG_KID]

Also brand new

 

[NacIK]

IAT. Just went through the same thing with mine. I thought it was the distributor since I just rebuilt and put it together but it ended up being the intake sensor. It was showing 90 degrees out when it was 12.

 

[BIG_KID]

I should of said the year of my truck (1991)
I don't believe it uses a IAT sensor

 

[NacIK]

Oh, scratch that, something else.

 

[jkeaton]

Coolant temp sensor?

 

[BIG_KID]

Also new and verified with ohm meter