Duratec Focus wants to meet refined Returnless...
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Duratec Focus wants to meet refined Returnless...
No. not MATCH.com... Hello to the MS gurus and shadetree mechs. I am needing to find if anyone has succeded in PWM-ing the stock OEM returnless fuel pump? I'm using an MS2 3.57, dual coil drivers and an Innovate WB O2. The engine is inline w/a Ranger M5, 5-speed connected to a Dana 36 '85 vette rear, in a '31 Model A. It would be most lovely if...if I could run the system returnless. A second line returning to the cowl tank is tough to work out, and w/a pump tank and all stock Ford fuel system is in place, ready to be modulated...any tips or experiences are welcomed!
Re: Duratec Focus wants to meet refined Returnless...
I did some work on a feul pump modulator but found it was more difficult to control that I had though. My simple control had problems with overshooting the pressure sometimes and had problems when the supply voltage changed. Looked like a PID control was going to be needed. So I put it away and installed a normal fuel pressure regulator on the fuel filter that was hidden away and run one line from there to the fuel rail. Then after adding some garolite insulators to the fuel rails it works perfectly. James
Re: Duratec Focus wants to meet refined Returnless...
James, the methods are appreciated...I wondered if using the regulator meant that you were controlling the fuel pump with it? Using a feedback signal, or simply returning the excess fuel to a point upstream from the pump? Thanks, Pitman
Re: Duratec Focus wants to meet refined Returnless...
First I tried using feedback from a pressure sensor to run a duty cycle controller for the pump. Needed PID.
Then I tried using the injector pulsewidth to vary the duty cycle for the pump. Showed promise but I gave up before I I got it all worked out.
Took the easy way out and used a regular pressure regulator at the fuel filter insted of the fuel rail and retured fuel to the tank. James
Then I tried using the injector pulsewidth to vary the duty cycle for the pump. Showed promise but I gave up before I I got it all worked out.
Took the easy way out and used a regular pressure regulator at the fuel filter insted of the fuel rail and retured fuel to the tank. James