99, Fass pump and boost fooler.
I got stuck in town because the SOB would not start tonight. This has been an on and off issue but has gotten worse in the colder weather.
Here is whats going on.
I could turn the key and hear the short lift pump cycle. Bump the starter and the pump does not run. After an hour of messing around and having my father in law make a half hour trip with his wrecker to rescue me it started.

While trying to get it to start I ran a jump to the lift pump and it ran just fine but the engine would not start like that. At least I know the wires are good going back.

Do I have a bad ECM ? It will be plugged into a tester tomorrow. Any other suggetions? I see conflicting info on here. I see some refer to the PCM as turning on the lift pump and some refer to the ECM. Which is correct?

Thank-you

 

mine does that sometimes... in cold weather it will sometimes run the lift pump after bumping the starter and sometimes it won't... I think it has to do with the grid heater cycle... I can usually bump it a few times and it usually kicks on.... sounds like you have a fueling issue as well

 

Most likely batteries are about done. Have them LOAD CHECKED. YOU WILL FIND YOU ARE DUE.

 

[QUOTE=bigfish95971;3160314]Most likely batteries are about done. Have them LOAD CHECKED. YOU WILL FIND YOU ARE DUE.[/

The truck is spinning over very good , its just not starting. The lift pump is not getting the signal to run sometimes.

Thats still battery related??