Lost Communication with fuel Pump.

[blackdragon1]

Originally Posted by HUMTECH

Ive been working on these trucks since day one of production

HUMTECH I have PM you.

[blackdragon1]

Today my Mechanic got the engine started by connecting 12 volts directly two the Fuel Pump connector on the tank from another battery.
The engine idles & revs smoothly. So my fuel pump seems ok,
Im guessing I have a broken wire or ground on the fuel harness somewhere or the FPCM is stuffed.
Anyone have some ideas where to look next.

[HUMTECH]

If you cant communicate with the fpcm with the tech 2 scanner. check power and ground to the module and test the data line with an ohm meter for continuity. If all 3 are good you need a fpcm. Private messages not working right now.

[blackdragon1]

Today I opened the FPCM and it was soaking wet, with allot of visible damage on electronics board, I really thought this would be seamless plastic construction but its not, very poor design and location on the truck. see link

http://www.sandyblogs.com/techlink/2...ol-module.html

Hopefully when the new FPCM arrives my truck will start.

[blackdragon1]

We Replaced the FPCM and still cannot get the engine to start, But we now only have 1 DTC code showing on my scan tool= P0602,
Im not sure if this is related to the PCM/ECM or the new FPCM ??