I am putting a fuel cell in my YJ that is running a 98 4.0L engine was wondering what kind of fuel pump do I have to use with the fuel cell in order to get the pressure I need for the EFI. Thanks.....

cheapest and easiest is to get a ford mustang pump, it is frame mounted and the pressure is within 2psi of the 98 4.0's stock fuel pump

Brian

I thought mustangs had an in the tank fuel pump? What year mustang had the frame rail pump because I am putting a fuel cell into the rear portion of my tub. I am also runing an 89 mustang 5.0. I wanted a frame rail mounted pump so I would have to mess with fabbing up a bracket for the fuel cell. Any advice u can give me would be great.

Actually what my question is what excatly do I need to run the fuel cell....

A fuel cell would be nice.

If you are planning on using the '98's harness and JTEC controller, it would be much easier to use factory xj, zj, or even a wj tank.

The fuel supply is a 50 lbs. "returnless" line. This is regulated in the pump module. You can use a standard pump, but you would have to change the fuel rail and regulator.

The fuel module that is used on the '98 4.0's is an intrigual part of the system. The float is calibrated to the ccd buss. You could use just about any Chrysler tank and modules built after '98. I plan on setting a wj's tank in the bed of my CJ-7.

Other considerations are evap. pump and purge controllers. The purge controller is easy to hook-up with the charcoal canister. The evap. pump is used on California in '98. I don't know it federal had it. Basically the pcm sends a signal to a vacuum pump, and block-off solenoid in the purge line, and draws the tank into a vacuum. It must hold vacuum for a certain time, If a leak is found, it will turn on the check engine lamp. It will only do this when between 1/4 tank to 3/4. This is also why the complete module from a factory Mopar is your best bet.

Dude what the fuck did you just say..... INFORMATION OVERLOAD SCOTTIE!!!!!! AAARRRGGGGHHHH

What don't you understand?

You can't just put a fuel pump in the line. There is no return line on a '98 4.0l's rail. Fuel pressure is determined by the fuel regulator, and not the pump.

Ok so my question would be?? What exactly do I need in order to run the fuel cell. I talked to someone from summit and they said I could run the Holley inline electric pump thats for EFI systems, But you are saying that there is more to it... I guess I am just trying to understand what I need to run this fuel cell... Thanks....

There are basically 2 kinds of pumps. Low pressure/high volume, and a high pressure pump. You will need the high pressure type pump like Summit suggested (and the Ford frame mounted pump).

A '98 4.0l's fuel rail dosn't have a return line. If you just hooked up the pump, it will "dead head", and the pressures will max out and probably destroy the pump. You will need to change the fuel rail and install a return line. The fuel rails that have a return line also use a regulator that is set between 35-42 lbs. Your system uses a fixed 50 lb. system, so you will also have to change/modify the regulator.

As I tried to explain, the fuel tank has intrigrated other devices for emissions that should also be hooked up. Your fuel sending unit, canister purge, and evaporitive emissions pump.

If you wanted to use a fuel cell, I would recommend dropping back to an earlier (pre '96) fuel injection system.

I put a fuel cell in my 99 TJ, so it'd be the same thing for you.

Dorfs is right, there is no return line.

What I did was got a new fuel rail, new rail mounted regulator, new feed/return lines off the rail...all this was from a YJ style 4.0 motor. This allowed me to run an off the shelf AC Delco frame rail mounted fuel pump/filter. If you need a place to get the stuff, give Hesco a call.

Good luck.

CJ

Originally posted by redruM
cheapest and easiest is to get a ford mustang pump, it is frame mounted and the pressure is within 2psi of the 98 4.0's stock fuel pump

Brian

Hmmmmm..

Mustang electric fuel pumps were never frame mounted.

Fuel pressure is not determined by the pump, it is determined by the regulator.

DISREGARD THIS POST :barf: