Help with low fuel psi.

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Jun 2, 2009 | 09:13 AM

Nice Work Truck

Thread Starter

Post Fiend

Joined: Nov 2006

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From: CT

Help with low fuel psi.

I have a 07 F350 6.0 and I can't get the fuel psi to stay up.
The truck has ARP studs, EGR delete and I run Erics X street as a DD. I also put on a ITP RR kit and the psi will not stay up. I have the RR kit set at 65psi. and when I get on it the psi drops, even at 1/2 pedal drops to 35-40psi and at WOT it drops to 20PSI

I dont know if I shoud try the Airdog II when it comes out or do a Airdog 100 and hope that does it.
Dennis at ITP said he does not like the new Airdog II because it only does about 55psi.

I am looking for some input and help befor I start cookig injectors.

Thanks

Jun 2, 2009 | 09:52 AM

brickie

Cargo Master

Joined: Mar 2007

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From: AB/BC

Andy,I was in the same spot but also lost pressure the longer the stock pump ran.The FASS 95/90 2014 cured all fuel delivery problems,the spring will push about 70 psi but I have the ITP set at 57-58.The difference in power above 2500 is fantastic.The fass is a bit louder than the stock pump but the straight pipe drowns it out on anything above idle.

Jun 2, 2009 | 10:13 AM

Nice Work Truck

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Post Fiend

Joined: Nov 2006

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From: CT

Brickie did you order the Fass with the spring in it?
Also did you have to drop your tank to install it?
I have a cab&chassie and my tank is aft of the axle and would be a REAL PIA to drop

Jun 2, 2009 | 10:41 AM

brickie

Cargo Master

Joined: Mar 2007

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From: AB/BC

The spring was sent out after the pump(it mistakenly had a 20 psi spring shipped with it) they sent out a 60 or 65 psi spring that made about 70 psi witch is a little high but the ITP knocked it down to the high 50s.
The pump bolted on in a couple hours with all the stock lines, so no need to drop the tank.

Jun 2, 2009 | 10:45 AM

Nice Work Truck

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Post Fiend

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From: CT

Thanks for the info Tony.
How do you like those injectors I was thinking of doing some 155cc some day. Do they help with towing and MPG?

Jun 2, 2009 | 10:52 AM

brickie

Cargo Master

Joined: Mar 2007

Posts: 3,103

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From: AB/BC

No problem Andy.The injectors are an overall improvement and they gained me a couple miles a gallon.The fass seems too add a mile or two aswell.When the injectors in the Ex go I will hunt Josh down and have another set of these made up for that one for sure.

Jun 2, 2009 | 10:58 AM

joe blow

Logistics Pro

Joined: May 2004

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GUYS,
Is it safe to assume that when I install my Regulated Return from ITP (stock injectors, stock pump HP tune) that I am going to need to upgrade to a fuel delivery system????????