Need help bad...returnless fuel issues

JTs03v6 · September 21st, 2009, 10:36 PM

I'm running focus svt fuel pump on a 03 v6 with returnless fuel system. I swapped upper intake manifolds about 6months ago and that caused my pump to max out. My tuner recomended that I run 8g wire from the engine bay fuse box to the fpdm. I wired 8g directlly to the fpdm 16g wire about 1" away from the fpdm. I got an updated tune 3weeks ago and took it for a datalog to find out my pump was maxing again. So I decided to do the wire upgrade the right way this time. I bought a 50a relay from nos. I ran 8g wire from the fuse box to the relay and coming off the relay I ran 8g wire to the inertia switch plug witch I replaced the 16g with solid 12g. Replaced the 16g going to the fpdm with 1" of solid 12g and ran 8g to12g that I put in the fpdm. Going to the fuel hat I ran 10g to the hat. I also replaced the fuel filter.
Heres the funny part with or with out the wire upgrade the pump maxes at 5300 rpm. I'm thinking the fpdm may be screwed up or the sensor on the rail needs to be replaced. I need help on what to do next.

~C~ · October 19th, 2009, 04:13 PM

Well you just blew my mind with all that! I would PM sweet2k. He is good with this stuff.

On the other note, my focus pump maxes at 6000rpms. I think its the focus pump. Before you go replacing all sorts of stuff, maybe look into getting the gt pumps or kb boost-a-pump or something.

SWEET2KSTANG · October 20th, 2009, 01:37 AM

ditch the focus and get the GT pump.

Trick Tuners · October 20th, 2009, 11:00 AM

A single focus pump is crap in my experience.
Returnless Fuel Pump Upgrade Guide - Trick Tuners Forums

~C~ · October 20th, 2009, 04:05 PM

Originally Posted by SWEET2KSTANG

ditch the focus and get the GT pump.

well there ya go. nuff sed!

September 21st, 2009, 10:36 PM	#1
JTs03v6 Regular Join Date: Sep 2009 Posts: 92	Need help bad...returnless fuel issues I'm running focus svt fuel pump on a 03 v6 with returnless fuel system. I swapped upper intake manifolds about 6months ago and that caused my pump to max out. My tuner recomended that I run 8g wire from the engine bay fuse box to the fpdm. I wired 8g directlly to the fpdm 16g wire about 1" away from the fpdm. I got an updated tune 3weeks ago and took it for a datalog to find out my pump was maxing again. So I decided to do the wire upgrade the right way this time. I bought a 50a relay from nos. I ran 8g wire from the fuse box to the relay and coming off the relay I ran 8g wire to the inertia switch plug witch I replaced the 16g with solid 12g. Replaced the 16g going to the fpdm with 1" of solid 12g and ran 8g to12g that I put in the fpdm. Going to the fuel hat I ran 10g to the hat. I also replaced the fuel filter. Heres the funny part with or with out the wire upgrade the pump maxes at 5300 rpm. I'm thinking the fpdm may be screwed up or the sensor on the rail needs to be replaced. I need help on what to do next. __________________ 03 3.8 procharger d1sc 318/326to 5000rpm 8.41@87.3mph in 1/8th (needs a pi 3500 stall)

October 19th, 2009, 04:13 PM	#2
~C~ ~C~, The Other White Meat! Y2K YellowJacket GT ~TBD~ Join Date: Jun 2008 Location: West side B-More Posts: 1,601	Well you just blew my mind with all that! I would PM sweet2k. He is good with this stuff. On the other note, my focus pump maxes at 6000rpms. I think its the focus pump. Before you go replacing all sorts of stuff, maybe look into getting the gt pumps or kb boost-a-pump or something. __________________ BLOWN Bumblebeast! 370 rwhp / 381 ft lbs ~Tuned by JJ at WMS "Like the blind man says......We shall see...."

October 20th, 2009, 01:37 AM	#3
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 8,987	ditch the focus and get the GT pump. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction

October 20th, 2009, 11:00 AM	#4
Trick Tuners Hardcore Enthusiast KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 2,436	A single focus pump is crap in my experience. Returnless Fuel Pump Upgrade Guide - Trick Tuners Forums __________________ SCT Tuning, JLT intakes, Aeroforce OBDII gauges and PLX wideband products @ Trick Tuners My forums Xcal3 SF with preloaded tunes and free custom tunes for life for $379 shipped. Custom tunes based on actual data is extra.

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