Fuel pressure issues!! see pic! - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

scv_guy · 04-28-2015, 04:32 PM

I have a 2010 Camaro L99 stock engine with the following mods:
turbonetics kit set to 10psi via boost controller
70lbs injectors
meth injection 50/50 mix
Livernois dual pump assembly
cat delete w/ full exhaust

here's the problem, at WOT I'm seeing fuel pressure drop at both the rail and injector delta pressure (I have a mech. connected to the fuel rail for testing) See the attached log, I was under the assumption that with that pump I would not see a pressure drop at the rail. Are there setting in HP tuners I missed for the FCPM or pump control?

Andy@Livernois · 04-29-2015, 08:56 AM

ok, still really confused with this. You have a little over 9# of boost, and are showing a delta pressure of 45.4#. 45.4+9.13= 54.53 or maybe 2-3# of pressure drop. I would double check the install of the pump as well, as we make over 700 RWHP without any issues with this without a BAP or methanol. And those are on blower cars, turbo cars are even easier on the fuel system. Something has to be wrong somewhere whether it be the install, or the tune.

scv_guy · 04-29-2015, 09:58 AM

Quote:

Originally Posted by Andy@Livernois

ok, still really confused with this. You have a little over 9# of boost, and are showing a delta pressure of 45.4#. 45.4+9.13= 54.53 or maybe 2-3# of pressure drop. I would double check the install of the pump as well, as we make over 700 RWHP without any issues with this without a BAP or methanol. And those are on blower cars, turbo cars are even easier on the fuel system. Something has to be wrong somewhere whether it be the install, or the tune.

ok let's say the tuner didn't tune the pump drivers as James from Livernois called them, would this cause the problems I'm seeing at the rail as far as the pressure drop is concerned?

Andy@Livernois · 04-29-2015, 02:05 PM

Quote:

Originally Posted by scv_guy

ok let's say the tuner didn't tune the pump drivers as James from Livernois called them, would this cause the problems I'm seeing at the rail as far as the pressure drop is concerned?

it still should not. We have people drop them in and go all of the time without issue. My fear is something was changed in the tune that is effecting it the incorrect way, or it's installed improperly.

scv_guy · 04-29-2015, 02:09 PM

Quote:

Originally Posted by Andy@Livernois

it still should not. We have people drop them in and go all of the time without issue. My fear is something was changed in the tune that is effecting it the incorrect way, or it's installed improperly.

The tune may be a possibility, but the install was pretty straight forward. No problems there.

04-28-2015, 04:32 PM	#1
scv_guy Drives: 2010 Camaro SS Join Date: Jan 2015 Location: Valencia Posts: 1,305	Fuel pressure issues!! see pic! I have a 2010 Camaro L99 stock engine with the following mods: turbonetics kit set to 10psi via boost controller 70lbs injectors meth injection 50/50 mix Livernois dual pump assembly cat delete w/ full exhaust here's the problem, at WOT I'm seeing fuel pressure drop at both the rail and injector delta pressure (I have a mech. connected to the fuel rail for testing) See the attached log, I was under the assumption that with that pump I would not see a pressure drop at the rail. Are there setting in HP tuners I missed for the FCPM or pump control? Attached Images

04-29-2015, 08:56 AM	#2
Andy@Livernois Drives: 1987 Buick Regal Turbo-T Join Date: Sep 2009 Location: Grand Blanc, MI/Dearborn Heights, MI Posts: 452	ok, still really confused with this. You have a little over 9# of boost, and are showing a delta pressure of 45.4#. 45.4+9.13= 54.53 or maybe 2-3# of pressure drop. I would double check the install of the pump as well, as we make over 700 RWHP without any issues with this without a BAP or methanol. And those are on blower cars, turbo cars are even easier on the fuel system. Something has to be wrong somewhere whether it be the install, or the tune.