Stage 3 CP3... Who's got .. I got questions

[pipeguy]

I have installed a stage 3 cp3 today and have a few questions.....



For thise that have it ... are you seeing a SIGNIFICANT pressure drop off the line ... like down to 2000-3000psi off the line??? My truck feels like it has serious turbo lag... and its the lack of fuel to the rail. Once the RPM's are to 1500-2000 the rail pressure is up and the truck pulls like a raped ape. Even at 60mph on the hwy and mash it the rail pressure drops to like 4000-6000psi (from 18000-20,000)and then raises... . ? Feed pressure to the CP3 is a constant 24psi and only drops about 1psi at WOT.



MY STOCK CP3 HAD A BETTER PULL OFF THE LINE. #@$%!



Is anyone else seeing this?



The vendor / builder has been contacted (after 1st test drive), and has suggested installing the stock FCA back in the stage 3 (dmax) pump. Please correct me but, is not the flow indicative of the inlet (FCA) flow and pressure? Or am I dreamin'? Is not a portion of the modifications to a CP3 flow the FCA modifications?



I tried pulling the EZ no change, tried all programs on the TST no change, ... . \



Any suggestions?

 

[WPeschel]

I have installed a stage 3 cp3 today and have a few questions.....



For thise that have it ... are you seeing a SIGNIFICANT pressure drop off the line ... like down to 2000-3000psi off the line??? My truck feels like it has serious turbo lag... and its the lack of fuel to the rail. Once the RPM's are to 1500-2000 the rail pressure is up and the truck pulls like a raped ape. Even at 60mph on the hwy and mash it the rail pressure drops to like 4000-6000psi (from 18000-20,000)and then raises... . ? Feed pressure to the CP3 is a constant 24psi and only drops about 1psi at WOT.



MY STOCK CP3 HAD A BETTER PULL OFF THE LINE. #@$%!



Is anyone else seeing this?



The vendor / builder has been contacted (after 1st test drive), and has suggested installing the stock FCA back in the stage 3 (dmax) pump. Please correct me but, is not the flow indicative of the inlet (FCA) flow and pressure? Or am I dreamin'? Is not a portion of the modifications to a CP3 flow the FCA modifications?



I tried pulling the EZ no change, tried all programs on the TST no change, ... . \



Any suggestions?

Whos stage three cp3 is that??? I have not got around to installing mine yet... I think RobertP bought one around the same time I did maybe he has some input..... Did you get one of the first batch?? When it did pull did it pull harder than the stocker???

 

[pipeguy]

Mine was delivered last Thurs and installed today.

 

[WPeschel]

Mine was delivered last Thurs and installed today.

Whos stage three cp3 is that???

 

[pipeguy]

Came from the same place as yours... II ... not sure if the other guy is shipping his yet...

 

[WPeschel]

Came from the same place as yours... II ... not sure if the other guy is shipping his yet...

Cool... I havent installed mine yet waiting on money to buy a silver bullet... I will hopefully get eveything installed in June... I hope you get this problem figured out... I was also under the impression that the FCA was modded... Maybe their is something wrong with the FCA... Is there any codes?? What is the max rail pressures??

 

[pipeguy]

No codes... WOT I am seeing 25000-27000+++



I did not re-install the dual feed line... . could not get it to stop leakin... or any of the replacements...

 

[WPeschel]

No codes... WOT I am seeing 25000-27000+++



I did not re-install the dual feed line... . could not get it to stop leakin... or any of the replacements...

Definately keep us all updated on this... . I hope it is something like a bad fca... Did you try the stock FCA??

 

[pipeguy]

Going to try the FCA from the stocker (under suggestion of the builder/modifyer) ... but that seems just wrong some how... . for what you pay for a modded pump...

 

[WPeschel]

Going to try the FCA from the stocker (under suggestion of the builder/modifyer) ... but that seems just wrong some how... . for what you pay for a modded pump...

If I were you I would just try it and if it works properly then send the old one in and have them send a new modded one over nite... .

 

[pipeguy]

Stage 3 Uses A Stock Fca From The Stock D-max Pump



No Modifications There So ?????

 

[WPeschel]

Stage 3 Uses A Stock Fca From The Stock D-max Pump



No Modifications There So ?????

Got ya... I did not know that... Are the FCA's the same??

 

[RobertP]

i would suggest using the stock cummins fca on it anyway. i have heard that they work better. instead of the stage three we ended up doing the duel pumps.

 

[GWoody]

I wonder if the electronics could be messing up, maybe they would send you a new box and try that.

 

[RobertP]

to clarifie a few things, the stock dodge fca can handle extra input psi but the d-max one can not, so put a stock dodge fca on and you problems will go away, if they dont you have other issues. hope this helps.

 

[pipeguy]

Well stock fca helped a bit. Still dropping pressure like a stone off the line.



II have been working with me on this... They have been real stand-up guys an are stepping up to help get it fixed. Spent over an hour on the phone with a few people there.



Will post more once we figure it out...

 

[R_Painter]

does 24 psi of fuel pressure going to the cp3 seem a little low?? floor it diesel told me my stage 2 pump likes 40 psi or higher. I notice the more fuel pressure I fed it the better my truck runs

 

[TCDiesel]

Pipeguy Contact Us.

 

[pipeguy]

PM sent



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[pipeguy]

does 24 psi of fuel pressure going to the cp3 seem a little low?? floor it diesel told me my stage 2 pump likes 40 psi or higher. I notice the more fuel pressure I fed it the better my truck runs

RPainter -



Putting too much pressure to the stage 3 causes problems... It runs best 20-24 ... So I have been told... .