sitdownsteve

well i pluged the relief valve and still the rail is way low... so whats next... fuel pressure gauge? how much should i see, and at idle or wot, also where to tap in to the line at, under the hood or back by the tank? i just dont understand how on say day 1 with just the x2 on hot race it held rail pressure then on day 2 i stack it and it dynoed real low go back to the first program "hot race" and with in less than a day it wont hold the rail anymore????????

O.T

Sit-down Steve.,

Rail pressure at idle can be between 5000psi-7500psi, I would expect it to be around 5k in your application. WOT 19-23k holding stong at 25k with a stock pump may be a stretch. I would not think you are loosing a bunch of power at 21K.
You can plumb a fuel pressure sensor in the line between the fuel filter canister and the cp3. With the Fass I would say 20psi should be what you will see.
Dont' get all off track with the numbers...it can take sometime to get things dialed in. Like others have said that stack may not be optimum.

one54ton

wierd...my buddies earlly California 04 did 450/1000 with smarty revo, 06 turbo, 5 ich exhaust, afe 2, quad boost fooler, cfm+ and a grid heater delete

sitdownsteve

i was told under 22,000 your loseing power... im seeing 19,000/20,000 i have a rail gauge i want to know about fuel pressure not rail pressure

cquestad

That is true...

You may be out of pump...have a crippled pump or cascade valve...or?

sitdownsteve

i dont see how the pump could go out in matter of hours... it ran fine then i stacked it and it was slower than i went to the first set up and its not the same... i was told the bully dog may have done something to my ecu making it give less fuel????

chrleb1

Sometimes the triple dog can lock on a certain program (not want to change from tow to performance or to extreme). I've had this happen on a couple of trucks. It is the way they build the program. It is one program with different triggers in it. If the ECM isn't seeing the right triggers it will just stay where it was. Sometime if you off load the program and re-load it, it will work. Other times you can just keep on changing levels and then it will work.

sitdownsteve

but when i take the bully dog off the truck and put the x2 back on it wont hold rail like it did before... its 4-6,000 psi less i am hooking up a scan tool tonight see i will let you know how that works

jmccart

That is cool. Did he do that with the regular REVO or the TNT revo?

ropnjessi

I did 456hp/900.9 on the Predator "Tow Tune" Puc on 90 and TST on 5/3 with everything on my signature but the FASS, I had a Carter Pump Pusher.

sitdownsteve

so i feel really dumb but the problem is fixed.... the lift pump "fass system" was not pluged in... it runs great know and will post new dyno numbers in the next couple days

Don M

LOL. Dont feel dumb. Everyone, ( myself included ) have missed some finer points/details. It happens.

I could tell you some stories of the early days with the 12 valves when we first started doing injectors. LOL Funny stuff.

matego

Glad to see it has been fixed. Dont feel too bad, it still amazes me when techs at work will diagnose electrical problems for 4+ hours and when I go to see whats going on the batteries are growing fungus.

At least it was a simple fix.

cquestad

I did the same thing for two days scratching my head with my 04.5...LOL!

subs1000w

well on a good note i put down 477hp with no lift pump... the truck feels real strong now... leaving now to go see if the dyno is open and will report back if i get to run it