blownsub

What kind of fuel pump upgrade can be done on a 2011 flex fuel pump module, if any? Have a DW340 to go in, just not sure what to do. Any help would be appreciated.

gamble686

iTrader: (3)

Some guys do the boost a pump. I have seen people use the ZL1 pump. How much power are you making?

blownsub

550+ rwhp is expected. It came to me running out of fuel and 95% injector duty cycle. Have 90lb injectors to go in and a DW340. Never done this mod on this module though. Need a little coaching. Thanks..

Byrdman11

iTrader: (1)

The stock flex pump made 600rwhp in my 2011 1500 6.2 turbo.

blownsub

I hear you. I thought the pump should be big enough too being a flex fuel pump. But he claims he's 95% duty cycle and running out of pump. So I'm on the hunt..

gamble686

iTrader: (3)

Process to delete FPCM with return fuel system
Unpluged the FPCM
*under the bed of the truck above the spare
Large Pins 47 & 16 with around 10 gauge wire supply ground and power to the pump
ground is Pink ...WT
Depin the connector and repin for new weather pack relay
Pin 13 Dark Green / white stripe is the trigger form the PCM key hot.

in HPT turn off P0230 and U0109
Then get what ever pump you want. Popular choice around here is walbro 400/450

blownsub

Thanks. Ill keep this for the future. Evidently enough research wasn't done up front. The stock flex fuel pump will do for now.

Byrdman11

iTrader: (1)

You can install a walbro 450 and the truck FPCM run it. That what I did and I'm doing a twin 450 now but im turning on the second pump with a hobbie switch.

Vortec-SS88

Gamble, nice information. Thank you for the help.