Fuel pressure sensor

Used only on the 03/04 Marauder but can be used on any 03/04 ecu with code changes. Uses newer style SCP array so will not control cluster correctly on 2004 and older fords that use the older style SCP array such as mustangs.
dleach1407
Posts: 468
Joined: 2021 Mar 21, 15:17
Location: Colorado Springs, CO
Vehicle Information: 95 Mustang GT, CBAZA Quarterhorse
331, 190 11R heads, Edelbrock Victor 50 manifold, F303, T5, 76mm Turbo, 91 octane, Returnless dual pump 03 cobra tank, Behind bars rails, 80# siemens injectors
wbo2_030MtxL

57 F100, RZASA, 04 Crown Vic ecu and harness, 302, GT40 heads, 4r70w, 80# deka5 shorties, Holley carb style throttle body, Speedmaster high rise intake manifold

Fuel pressure sensor

Unread post by dleach1407 »

Is there a fuel pressure sensor i can use other than the oem unit? My rails don't have provisions for the sensor and i was hoping i could use something like the AEM lab grade sensor and simply plot the pressure voltages in the tune. Since i am planning on running boost should i just use a regulator?
decipha
Posts: 4950
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'19 F-150 3.3L

Re: Fuel pressure sensor

Unread post by decipha »

Aftermarket sensors don't measure injection pressure they measure rail pressure so it wouldn't be ideal to use them. All fuel systems require a regulator of some sorts that has nothing to do with the rail pressure sensor.
dleach1407
Posts: 468
Joined: 2021 Mar 21, 15:17
Location: Colorado Springs, CO
Vehicle Information: 95 Mustang GT, CBAZA Quarterhorse
331, 190 11R heads, Edelbrock Victor 50 manifold, F303, T5, 76mm Turbo, 91 octane, Returnless dual pump 03 cobra tank, Behind bars rails, 80# siemens injectors
wbo2_030MtxL

57 F100, RZASA, 04 Crown Vic ecu and harness, 302, GT40 heads, 4r70w, 80# deka5 shorties, Holley carb style throttle body, Speedmaster high rise intake manifold

Re: Fuel pressure sensor

Unread post by dleach1407 »

My understanding of the ford pwm pump systems is there is a controlled leak after the pump inside the tank (orifice) which allows the pump to bleed down and the computer varies the pwm signal to maintain pressure. AFAIK, There is no mechanical regulation. Is that not accurate? CAn you explain what the difference between injection pressure vs rail pressure? Im not sure I understand the difference.
decipha
Posts: 4950
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'19 F-150 3.3L

Re: Fuel pressure sensor

Unread post by decipha »

no thats wrong

rail pressure is exactly that -the pressure of the fuel rail
injection pressure is the actual delta pressure that the injector sees
http://efidynotuning.com/inj.htm

on returnless fuel systems 1999-2010 the regulator is mounted in the tank and is better know as the PPRV. Positive pressure relief valve. It pops off between 65psi and 90psi to prevent over pressurizing the injectors if there was a fault. It also acts as the regulator when the fuel rail pres sensor fails as the ecu powers the pump and cant do any trimming.

On returnless setups the pump voltage is modulated to deliver a desired delta pressure from the frps. It can only control pressure below the pprv.

On the 2011 coyotes on up ford swapped back to the earlier 98 and older return style fuel system. They kept the PPRV in the tank instead of mounting it on the rail that way they dont need a return line and they dont use a frps since its not returnless. They kept the fpdm and give the pump half voltage at idle and low loads.
dleach1407
Posts: 468
Joined: 2021 Mar 21, 15:17
Location: Colorado Springs, CO
Vehicle Information: 95 Mustang GT, CBAZA Quarterhorse
331, 190 11R heads, Edelbrock Victor 50 manifold, F303, T5, 76mm Turbo, 91 octane, Returnless dual pump 03 cobra tank, Behind bars rails, 80# siemens injectors
wbo2_030MtxL

57 F100, RZASA, 04 Crown Vic ecu and harness, 302, GT40 heads, 4r70w, 80# deka5 shorties, Holley carb style throttle body, Speedmaster high rise intake manifold

Re: Fuel pressure sensor

Unread post by dleach1407 »

Thanks for the explanation. I had the ford system all wrong.

Is there any way to regulate pump voltage using RZASA? I would really like to be able to ramp the pump voltage using the pwm feature with a SS relay based on load. I dont mind putting a regulator in the back to control the pressure. Im really looking at ways of minimizing heat transfer to the fuel. If I can minimize fuel recirculating that will help significantly. With the high altitude here, fuel boils pretty easy so im trying to plan ahead.
decipha
Posts: 4950
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'19 F-150 3.3L

Re: Fuel pressure sensor

Unread post by decipha »

yes just simple wire up an fpdm and rail pressure sensor and control it like stock. You need a pump designed for pwm like a stock coyote pump that I recommend. Simply toss a regulator next to the tank with the pressure set to 65psi and just control pressure with the ecu.
dleach1407
Posts: 468
Joined: 2021 Mar 21, 15:17
Location: Colorado Springs, CO
Vehicle Information: 95 Mustang GT, CBAZA Quarterhorse
331, 190 11R heads, Edelbrock Victor 50 manifold, F303, T5, 76mm Turbo, 91 octane, Returnless dual pump 03 cobra tank, Behind bars rails, 80# siemens injectors
wbo2_030MtxL

57 F100, RZASA, 04 Crown Vic ecu and harness, 302, GT40 heads, 4r70w, 80# deka5 shorties, Holley carb style throttle body, Speedmaster high rise intake manifold

Re: Fuel pressure sensor

Unread post by dleach1407 »

From my understanding, the 340lph is a turbine pump which AFAIK will work with PWM. Ill probably use that since I have an almost new 340lph im about to pull out of my car. Also, do i want a crown vic fpdm or one from an 2011+ 'yote, wasnt sure if I could run the one from the new mustang?
decipha
Posts: 4950
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'19 F-150 3.3L

Re: Fuel pressure sensor

Unread post by decipha »

no the crown vic one is better
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