Started yesterday, truck cranks great idles for about 30 seconds and shuts off, Cranks back right away with the same results. I have looked and unable to spot any ripped vacum lines or anything out of the ordinary. It is a 4.0, 4x4, with auto trans. Any suggestions would be appreciated. Forgot to add the truck is not throwing any codes, It is a 2011 with 130,000miles. the cats were replaced on it about a year ago and it was tuned with new plugs and wire at that time, Thanks in advance

 

does it run ok if driving, is it just an idle issue, low RPM.

 

Malfunctioning IAC valve?
Packed Air Filter? (unlikely)
Nealy plugged fuel filter?
Screwed up/broken/worn TPS? (it is a plastic part)

Could a worn/neglected MAF sensor deliver these symptoms?

 

it starts and runs maybe 30 seconds and stops. It will not stay running when you try to move it. I have changed everything except the Tps.

 

Maybe the PCV valve is out of its gromet (or the gromet itself is busted) or the L shaped run to the intake is cracked.
The PCV line is made of hard plastic pipe and 90* rubber elbows.
From the PCV valve, follow the hard plastic pipe to the right (across the back of the engine) then forward.
Several lines are vacuum sourced there.

 

The pvc valve may be a option, I was going to check it today but it has rained off and on all day. Thanks for all the suggestions and i will try and check that tomorrow.