Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.
This was my impression as well. I had thought Jess had the Walbro in there before he changed to return style, I'll let him answer though if he sees this thread.I was under the impression that the pumps were fairly interchangable between the two systems.
You are basing your worries on different platforms. Returnless systems from one vehicle to another are not the same. You will run into a point of driveability issues and making big power with the Ranger system.Kurt said:There are cars out there making a hell of a lot more power then my mild turbo ranger is with a return less system, so I am not worried about that aspect.
They don't list it for anything but Mustangs, T-birds and Crown Vic's.I don't think even Walbro will say the 255 is a replacement for the Ranger. I had to buy the one for the mustang, it's the same pump.
You can get a focus pump 310 L or a GT40, both are a little over $100. You CAN NOT use the regular pre-returnless pumps. they are not ment for variable voltage and will die a quick death.I am having a hard time finding a larger capacity replacement fuel pump for my 2000 ranger 2.5
This is a returnless system.
Anyone have any suggestions where I could find one?
Actually it is returnless. The regulator you speak of is actually a Parallel Pressure Relief Valve and it is more like a check-valve keep pressure in the fuel line when the engine is shut off so cold and hot starts. It's second function is the pressure relief in rapid deceleration situations... Bing that the Fuel pump is computer controlled at WOT the pumps voltage is increased as you are accelerating... Suddenly when you let off the throttle the pump is still at full tilt and the fuel has nowhere to go... the PPRV opens at 67 (+/- 7) PSI. So it's not really a return type system...just an overpressure relief valve.The returnless system is technically not returnless, the regulator is in the tank on the fuel return from the fuel filter. It's a fixed pressure system though.
99+ ( I think...what ever year the returnless's started for the trucks. 99 in the mustangs) The computer controls a FPDM (Fuel Pump Driver Module.) They usually can take about 20 amps.. more than that and they requite two (like the GT40's, they run two FDPM's one for each pump. 03/04 Cobras with more than 500hp or so usually have to run a Kenny-belle Boost-A-Pump, which increases he output of the FDPM. there is also a Company that bumps up the windings in the FDPM to take more amps. I'mnot sure what the 05+'s do I have not had the chanceto tear into one...Hmm, I'll have to look closer at the wiring diagrams then, I was under the impression that the computer simply activated a relay like the older systems. If it actually controls volume/pressure by changing the voltage to the pump, the computer has to have some rather stout internals to shunt that much amperage. Or are they controling it by some other method that I don't know about?
What years are you talking about?
Yeah.. and that's nice too because if for some reason it reads that the pressure drop is low and there is duty cycle left in the injectors it will compensate...There is a fuel pressure transducer in the system too?
Hmm, much more complicated than I had at first thought.