CPC Fuel Press. Regulator?

[Snopro_69]

Hey just wondering if any or you guys with PC kits (or even M kits, same regulator) have trouble building pressure?? My stage 2 when it's cold out I have to whale on it at least 20-30 times for it to spin over fast enough to build pressure. Also it doesn't hold pressure for real long time when shut off. My buddies M will hold pressure over night! It doesn't leak any fuel on the throttle body side so can it be failing an passing the pressure back?? Going to do a test an seal the outlet (throttle bodies) right at regulator an see how long it holds it then.

 

[hcrider]

had similar problem last year

I noticed mine after trailering back from mountain and could not get it to start to unload off trailer. fuel pressure would be around 15 or so. I started using the hot start switch and it would start in a few pulls and run like crap until it built up pressure. sometimes would have to start 2 or 3 times until it started running normal. i talked with dale and decided to try a new fuel pump. that was late in season and not sure if problem is gone or not. my kit is on a 2011 m chasis.

good luck. roger

 

[stcatman]

hard starting

I think its more of a low voltage to the fuel pump to build pressure,I turn my handwarmers off throw heat switch untill running, one time even unpluged the hood, Arctic thunder just had a thread were he intalled a plug to plug in a battery to run the fuel pump to pressureize.

 

[Snopro_69]

Ya I have to do the battery thing when it's real cold too. Also always have to throw the heat switch or it would never start (when not warmed up). Ya I think it's not turning over fast enough to create good voltage for sure. But that doesn't explain why my buddies would hold pressure over night an mine only couple hours.

 

[never enough snow]

on my 2012 i but the stock pump back in it and then installed a fuel driver board no more bullsh!t

 

[Snopro_69]

Fuel driver board????

 

[never enough snow]

boondocker fuel driver module

 

[Snopro_69]

Did some testing an talking to a guy today. It's def a voltage issue of the engine not being pulled over fast enough when cold. Was told you can wire diodes into the 4 wires in the harness so it creates full voltage to the pump on first few pulls. Anyone tried this?? I would assume u set the diodes up to block the voltage from going anywhere but to the pump on first pulls. Till it fires an reaches full voltage? I'm a lil confused by this concept without seeing the wiring right now. I'm an electrician so gunna mess around with some diodes.

 

[BigAir]

On the Twisted kits for the 07-11 Shain uses a wiring harness that powers the fuel pump off the stock fuel pump wire and then switches to the acc plug once the engine fires. I guess that the stock fuel pump wire puts out more juice when pulling the sled over. Don't know anything about the wiring on the '12 and newer sleds, but thought I would throw that out there.