Need help!! Please

[olaf2017]

2017 ram 2500 6.4l having issues with intermittent no start. I have replaced fuel pump today I'm thinking possible tipm but before I spend the money I'm looking for opinions and if someone has had same issue before. How do I test relay in tipm to verify relay? What would cause fuel pump to not get power? I have tested fuse 70 and it gets power when keys is turned on like it should. I have tested fuse 64 also and functions properly. What else can I look at to diagnose this and am I testing the correct fuses?

 

[Dodge 1500 4X4]

Did you have power at the connection of the fuel pump, did you have good pressure at the fuel rail, there is a jumper bypass wire to bypass the fuel pump relay in the TPIM, try these guys out, before replacing any other parts.

TIPM Fuel Pump Relay Solutions

www.verticalvisions.com

 

[olaf2017]

Truck cranked and run Fine then it was like someone just cut power to fuel pump. It does it intermittent.

 

[crash68]

Truck cranked and run Fine then it was like someone just cut power to fuel pump. It does it intermittent.

I'd suspect the fuel pump and/or the connection going to the fuel sending unit at the tank before the power distribution.

 

[olaf2017]

Pump is brand new just replaced yesterday. And pump was verified that it worked before install.

 

[olaf2017]

Truck runs perfect when running. Then something kills power to pump. And most of the time it's after I turn truck off that it won't restart. It has only stalled once since all this started.

 

[skuppy069]

When you put the truck in the run position you should hear the fuel pump run for like 2 seconds then shut off before you crank it over .
It does like a purge/prime on my 1500 every time before I hit start with the foot on the brake .

So I am wondering the times your truck don’t start if the fuel pump don’t get power to do the purge /prime .
Might be an easy start to narrow down the bad relay in the tipm .

 

[olaf2017]

Pump don't kick on in the no start condition. when I use volt meter on fuse 70 which is fuel pump motor fuse it gets power for the 2 second prime cycle. My question is does the fuse get power before or after fp relay and what else can I test

 

[tron67j]

Were you having similar problems before you replaced fuel pump? And how was the original pump diagnosed as bad?

 

[olaf2017]

Was same before pump. When I tested fuse 70 it was cycling correctly so I assumed pump because it was not activating

 

[olaf2017]

How do I test relay? And and what else can I test?