[01freak]

okay so I have a 2001 24v that is almost completely stock and it ran great and I went to go put a brand new fass lift pump on it and now it wont start and Its spitting back code p1689. what do I do?

 

[me78569]

did you bleed the injection system of air after installing the Fass?

What cranking pressure do you have?

Code 1689
Mopar1973Man's Dodge Cummins Articles - P1689 No Communication Between ECM And VP44

 

[OFT90]

To my understanding P1689 is a code caused by no comm between ECM and injection control module. Also to my understanding This could be caused by the Fuel pump relay. Mopar1973Man did a short write up on it, it can be seen here as well as the one
me78569 posted above i would check that first using the K.I.S.S concept
http://www.cumminsforum.com/forum/9...116431-p1689-error-code-cause-code-found.html

 

[01freak]

not sure of the pressure, I don't have a way to check it. I figured it needs to be primed again but after the code threw it freaked out the batteries so now waiting on them to charge

 

[Nicks24valve]

if it was running ok before the fass install, make sure you have everything install properly (fass relay,fuse, etc.) also make sure you have fuel at your injectors, go from there. Like stated before, K.I.S.S....its usually something simple

 

[OFT90]

Also I would highly suggest a set of gauges at a minimum as far as mods go it should be first. Fuel, boost, and EGT, as well as trans temp if it's an auto will be beyond helpful in diagnosing issues with these trucks. The up front may seem slightly expensive but you will thank yourself later when your not having to throw way more at it to fix it.

Keep us updated bud we will do our best to help

 

[Off-road]

i second getting a Fuel Pressure guage asap.

 

[01freak]

Ended up charging batteries and cleaning and changing remakes terminals. The ip had no fuel in it. Primed it and injectors and truck is starting better then ever now. Gonna keep checking the pump getting gauge for it just got to find the right ones. Thanks everybody for the input