2006 Ranger XLT Wont Stay Running

[rounsville42]

I have a 2006 Ford Ranger XLT 4.0 manual
Just driving down the road I lost power to any gear i tried and the truck wouldnt go over 20, also in a sort of limp mode chugging back and forth. I limped it to a part store and towed it home. I have 0 check engine lights, replaced the fuel pump, filter, and plugs and wires.
The truck runs now for about 2-3 seconds and shuts off and is hard to start again.

 

[sgtsandman]

Do you have a code reader? There could be pending codes that haven't lit the CEL yet.

 

[2011Supercab]

Does the CEL work?

Does it light up with engine off and the key in the run position?

 

[Uncle Gump]

Why did you replace the fuel pump?

 

[rounsville42]

Why did you replace the fuel pump?

We believed at the time the engine wasn't getting enough fuel, probably didn't need done.

 

[rounsville42]

Does the CEL work?

Does it light up with engine off and the key in the run position?

Yes it lights up in the on position

 

[Kira]

3 weeks on....
Huge vacuum leak?
Failed MAF sensor?
Bad throttle positioning sensor?