'86 2.9l v6 won't stay running after about 10-15 minutes

[ezmoney2884]

I have an 86 Bronco II 2.9l V6. It cranks great and runs smooth for about ten or fifteen minutes and then it starts to sputter. this can last from 30 seconds to a minute and a half and then it dies. It will not crank right back up. After it sits for fifteen to twenty minutes it cranks fine and runs smooth until the engine starts to heat back up. The process repeats from there.

The longer it sits between cranks, the longer it runs but never longer than fifteen minutes, roughly.

I just replace the inline fuel pump and filter.

Any other suggestions on where to look next?

Also, It idles at about 1500 RPMs in park and 1000 RPMs in gear. Not sure if that is normal.

 

[shadetreebronco]

I would look into the fuel pressure regulator , Idle Air Control valve , I had a cracked Throttle position sensor.
Also check threads at The ranger station site , lots more threads on this stuff there.