I have a 04 lb7 I have ppe tuner exhaust intake truck has 200k it seems to run really good but is sluggish off the line and I can't seem to get much more that 5psi holding the break every now and then I'll be able to build boost 15psi any ideas why this is?
Need some ideas
- Thread starter 6.6lb7duramax
- Start date
Have you checked for boost leaks? Hot side tube at steering box is notorious for a leak.
Do you have a boost increase valve?
What level is the tuner set to?
Lift pump?
What elevation are you at?
Do you have a boost increase valve?
What level is the tuner set to?
Lift pump?
What elevation are you at?
I have boost valve tuner is normally set on 2 or 3 out of 5 it's just the ppe standard no lift pump will build around 26 or so of boost but it's a slug off the line it has a 6in lift with 35s my buddy has a 01 with edge and that will break the tires lose off the line
I have a 6" lift with 35's also, with my PPE on level 3 won't smoke them either. It's 120hp at the flywheel, only about 55-60 at the wheels. Now on level 6..........:driving: :woott:
How old is your CP three pump
2004 Silverado Cali lb7, Airdog ll 165, fresh sticks at 325k, custom tuning on v2 by Rick Fletes, 33x12.5 nittos at on 20 inch American steal wheels, modded factory air box, Profab Intake Horn, Batmo Wheel, Turbo port and polish, Full EGR Removed w/ fed belt, 3.5 inch MBRP Downpipe, Full five inch MBRP Exhaust, 10mm lbz cp3 pump, Dual Yellow Top Optimas, High Output Alternator, Cognito Pittman and idler w/ support kit, Cognito Contol arms, Drilled and Slotted Rotors on all four Corners, Custom Y Bridge.
2004 Silverado Cali lb7, Airdog ll 165, fresh sticks at 325k, custom tuning on v2 by Rick Fletes, 33x12.5 nittos at on 20 inch American steal wheels, modded factory air box, Profab Intake Horn, Batmo Wheel, Turbo port and polish, Full EGR Removed w/ fed belt, 3.5 inch MBRP Downpipe, Full five inch MBRP Exhaust, 10mm lbz cp3 pump, Dual Yellow Top Optimas, High Output Alternator, Cognito Pittman and idler w/ support kit, Cognito Contol arms, Drilled and Slotted Rotors on all four Corners, Custom Y Bridge.
Iv read on some other forms that it might be tourqe management is this truck Is this true on a 04? If turned off defuling on the tuner that don't really do much other than when it shifts i don't really have a heavy foot or spin my tires but if I take it to a track or truck pulls is like more that 5psi for a launch i plan on getting a tranny and efi and a lift pump nothing crazy I would like like to know if anyone else has had this problem before I start spending money there's no cel and other than slow off the line and not building boost at the line it runs fine and not haze out the tail pipe no blow by and when it dose spool it's decently fast for being lifted and just a tuner
My first cp3 got weak at 140k and from there it was shit but never threw a code till I replaced it at 320k. Night and day difference. Your other option is your tuning. But the cp3 is a support mechanism so your better to start with that.
2004 Silverado Cali lb7, Airdog ll 165, fresh sticks at 325k, custom tuning on v2 by Rick Fletes, 33x12.5 nittos at on 20 inch American steal wheels, modded factory air box, Profab Intake Horn, Batmo Wheel, Turbo port and polish, Full EGR Removed w/ fed belt, 3.5 inch MBRP Downpipe, Full five inch MBRP Exhaust, 10mm lbz cp3 pump, Dual Yellow Top Optimas, High Output Alternator, Cognito Pittman and idler w/ support kit, Cognito Contol arms, Drilled and Slotted Rotors on all four Corners, Custom Y Bridge.
2004 Silverado Cali lb7, Airdog ll 165, fresh sticks at 325k, custom tuning on v2 by Rick Fletes, 33x12.5 nittos at on 20 inch American steal wheels, modded factory air box, Profab Intake Horn, Batmo Wheel, Turbo port and polish, Full EGR Removed w/ fed belt, 3.5 inch MBRP Downpipe, Full five inch MBRP Exhaust, 10mm lbz cp3 pump, Dual Yellow Top Optimas, High Output Alternator, Cognito Pittman and idler w/ support kit, Cognito Contol arms, Drilled and Slotted Rotors on all four Corners, Custom Y Bridge.
I have good rail pressure around 4500 5000 at idle and at wot it'll hit around 25000 did you lose pressure when it was getting week?
I lost a little bit, as soon as I got a 2 percent drop I replaced it. My fpr that came with my cp3 was brand new and would deliver 7k at idle so I switched it with a modded lb7 fpr and have had no issues since
2004 Silverado Cali lb7, Airdog ll 165, fresh sticks at 325k, custom tuning on v2 by Rick Fletes, 33x12.5 nittos at on 20 inch American steal wheels, modded factory air box, Profab Intake Horn, Batmo Wheel, Turbo port and polish, Full EGR Removed w/ fed belt, 3.5 inch MBRP Downpipe, Full five inch MBRP Exhaust, 10mm lbz cp3 pump, Dual Yellow Top Optimas, High Output Alternator, Cognito Pittman and idler w/ support kit, Cognito Contol arms, Drilled and Slotted Rotors on all four Corners, Custom Y Bridge.
2004 Silverado Cali lb7, Airdog ll 165, fresh sticks at 325k, custom tuning on v2 by Rick Fletes, 33x12.5 nittos at on 20 inch American steal wheels, modded factory air box, Profab Intake Horn, Batmo Wheel, Turbo port and polish, Full EGR Removed w/ fed belt, 3.5 inch MBRP Downpipe, Full five inch MBRP Exhaust, 10mm lbz cp3 pump, Dual Yellow Top Optimas, High Output Alternator, Cognito Pittman and idler w/ support kit, Cognito Contol arms, Drilled and Slotted Rotors on all four Corners, Custom Y Bridge.
The FASS 150 is our biggest seller here. Great units and no warranty issues with them. Let me know if I can help.
http://lincolndieselspecialties.com/i-19901301-fass-150-gph-titanium-series-lift-pump-2001-2010.html
Fast or air dog, both excellent support, just get one
2004 Silverado Cali lb7, Airdog ll 165, fresh sticks at 325k, custom tuning on v2 by Rick Fletes, 33x12.5 nittos at on 20 inch American steal wheels, modded factory air box, Profab Intake Horn, Batmo Wheel, Turbo port and polish, Full EGR Removed w/ fed belt, 3.5 inch MBRP Downpipe, Full five inch MBRP Exhaust, 10mm lbz cp3 pump, Dual Yellow Top Optimas, High Output Alternator, Cognito Pittman and idler w/ support kit, Cognito Contol arms, Drilled and Slotted Rotors on all four Corners, Custom Y Bridge.
2004 Silverado Cali lb7, Airdog ll 165, fresh sticks at 325k, custom tuning on v2 by Rick Fletes, 33x12.5 nittos at on 20 inch American steal wheels, modded factory air box, Profab Intake Horn, Batmo Wheel, Turbo port and polish, Full EGR Removed w/ fed belt, 3.5 inch MBRP Downpipe, Full five inch MBRP Exhaust, 10mm lbz cp3 pump, Dual Yellow Top Optimas, High Output Alternator, Cognito Pittman and idler w/ support kit, Cognito Contol arms, Drilled and Slotted Rotors on all four Corners, Custom Y Bridge.
So I put a fass on and did efi live and that cured my problem I was having but now like 2 times a week it won't start I get out hit the primer under the hood and it fires right up any ideas?
This or you have a loose connection. Rebuild kits for the filter head is only about $25 @ local parts store
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It'll do it no matter what fuel level is and wouldn't it be leaking if the filter head was bad? It never did this before only now with the fass on it
With my Air dog, I do not have to prime main filter. It takes about 7 psi to push through the bypass valve in the CP3 and return to the tank. By chance did you hook up the FASS so that it only runs when the engine is running? Check to see that the FASS is running when you turn the key on.