Fuel preasure bouncing around

cdjnight · 05-07-2008, 06:41 PM

Anyone have problems with fuel preasure not being steady? I have a GT supercar pump in Mustang GT canister and was working fine. I'm curious if its the pump or the controller taking a crap. Fuel psi bounces from as low as 20 to as high as 50 and most of the time is jumps from 30 to 45 at idle and at a steady throttle position.

*Randy Stinchcomb* · 05-08-2008, 05:54 AM

if I'm not mistaken, when using a GT(40) pump you need toget the upgraded FPDM from Mark at Zone Five Performance, if you'd have used a SVT Focus pump, it wouldn't be a problem.....

cdjnight · 05-08-2008, 01:56 PM

Quote:

Originally Posted by Randy Stinchcomb

if I'm not mistaken, when using a GT(40) pump you need toget the upgraded FPDM from Mark at Zone Five Performance, if you'd have used a SVT Focus pump, it wouldn't be a problem.....

I just ordered an SVT Foucs pump today, do you think the FPDM is ok still?

*Randy Stinchcomb* · 05-09-2008, 05:07 AM

Quote:

Originally Posted by cdjnight

I just ordered an SVT Foucs pump today, do you think the FPDM is ok still?

you'll be fine wth the stock FPDM and who did you order the pump from

as there are @5 Focus pumps but only 1 SVT Focus pump, we sell them for $95.00 + shipping

cdjnight · 05-09-2008, 01:35 PM

Quote:

Originally Posted by Randy Stinchcomb

you'll be fine wth the stock FPDM and who did you order the pump from

as there are @5 Focus pumps but only 1 SVT Focus pump, we sell them for $95.00 + shipping

Dam wish I knew that before but I ordered the Steeda Focus pump.

cdjnight · 05-15-2008, 02:41 PM

Fuel preasure is good now I still have a part throttle surge that I can't get rid of, any ideas, I cleaned IAC new O2 sensors and checked for vaccuum leaks. How about in my tune??? any idea where to go in the program to get rid of this???? HElp please

05-07-2008, 06:41 PM	#1 (permalink)
cdjnight Senior Member Join Date: Sep 2007 Posts: 116	Fuel preasure bouncing around Anyone have problems with fuel preasure not being steady? I have a GT supercar pump in Mustang GT canister and was working fine. I'm curious if its the pump or the controller taking a crap. Fuel psi bounces from as low as 20 to as high as 50 and most of the time is jumps from 30 to 45 at idle and at a steady throttle position. __________________ Momentum is everything till you drive off a cliff! 2003 Mustang GT, 5.4L Triton V8(LOL), Comp 270's gears and springs, Intercooled Precision T63, 42lb injectors, Flowmaster 3.5" Single Chamber, B&M Holeshot 3000, Racegate, Sniper Commando Tuning, Kenne Bell BAP,BG Mighty Sumo pump, MSD MOD6, LM1 wideband, Best e.t, 7.67@92mph in the 1/8th. on MT drag radials. No dyno tune yet. http://www.youtube.com/watch?v=DaJ2yQH1Ezs http://www.youtube.com/watch?v=J1hiMJy3ezk

05-08-2008, 05:54 AM	#2 (permalink)
Randy Stinchcomb Super Moderator Join Date: Aug 2005 Location: Randallstown, Md Posts: 2,507	if I'm not mistaken, when using a GT(40) pump you need toget the upgraded FPDM from Mark at Zone Five Performance, if you'd have used a SVT Focus pump, it wouldn't be a problem..... __________________ Randy Stinchcomb contact info: Liberty Ford of Baltimore 410-655-2000 parts ext 5618 like to fish visit us at www.sportfisherman.com need fishing tackle www.binnacletackle.com

05-15-2008, 02:41 PM	#6 (permalink)
cdjnight Senior Member Join Date: Sep 2007 Posts: 116	Fuel preasure is good now I still have a part throttle surge that I can't get rid of, any ideas, I cleaned IAC new O2 sensors and checked for vaccuum leaks. How about in my tune??? any idea where to go in the program to get rid of this???? HElp please __________________ Momentum is everything till you drive off a cliff! 2003 Mustang GT, 5.4L Triton V8(LOL), Comp 270's gears and springs, Intercooled Precision T63, 42lb injectors, Flowmaster 3.5" Single Chamber, B&M Holeshot 3000, Racegate, Sniper Commando Tuning, Kenne Bell BAP,BG Mighty Sumo pump, MSD MOD6, LM1 wideband, Best e.t, 7.67@92mph in the 1/8th. on MT drag radials. No dyno tune yet. http://www.youtube.com/watch?v=DaJ2yQH1Ezs http://www.youtube.com/watch?v=J1hiMJy3ezk

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