fuel pump question

Flatlanded87 · #1 (**permalink**) 07-01-2009, 06:23 PM

Hi there.
I've got an 87 f150 fuel injection system that's currently sitting on an early 70's 302 block with big plug heads. The thing never ran worth a **** with that motor so I'm gonna throw on a carb this weekend. (couldn't locate all the right parts to do a MAF swap, I've got stuff from a 96 but its the wrong computer)

Just a quick question on the fuel pump issue... can I use the electronic one or is it too powerful?

Also, the truck is an automatic 4x4... is anything in the transmission or the transfer case electronically controlled via the computer?

Has anyone done this kind of backwards swap before? Problem/issues?

Any tips are welcome, thanks for replies in advance.

Conanski · #2 (**permalink**) 07-01-2009, 06:44 PM

What year is the truck?

Flatlanded87 · #3 (**permalink**) 07-01-2009, 07:43 PM

1987... it was someone else's project/mutant I took over.

Conanski · #4 (**permalink**) 07-01-2009, 10:36 PM

That truck should have low pressure pumps in the tanks and a high pressure pump on the frame, so you could simply remove the high pressure pump and have something that is carb friendly. There were no electronic trannys used back then either so you won't have that to deal with, likely you have a C6 3-speed or AOD 4-speed. You will of course have to install an ignition system and matching distributor and do something with the under hood wiring. It's very likely the cam in the motor right now is what is causing the problems with the EFI system, swapping in something EFI friendly would make a big difference and would also be less work than a carb conversion but to each his own.

Flatlanded87 · #5 (**permalink**) 07-02-2009, 01:25 AM

Thanks for the reply.
The big deal is that I have all the parts I need for the carb conversion due to the motor I'm building for my Mustang so I figured I'd just build my Mustang motor in my truck for now. I figure a fuel pressure regulator might be the route I go, I guess I could also just delete the high pressure pump.

As far as coils go... will the stock EFI one work with a dual-point distributor?

You're right about the cam issue, which is why I wanted to convert it to a MAF system but the headache is too much for me, I've got 2 other projects that require my attention. Most likely I'll leave alot of the EFI stuff in there for when I find the proper doner for it later.

Thanks for the help.

PerfDistIgnition · #6 (**permalink**) 07-16-2009, 04:34 PM

Quote:

Originally Posted by Flatlanded87

Thanks for the reply.
The big deal is that I have all the parts I need for the carb conversion due to the motor I'm building for my Mustang so I figured I'd just build my Mustang motor in my truck for now. I figure a fuel pressure regulator might be the route I go, I guess I could also just delete the high pressure pump.

As far as coils go... will the stock EFI one work with a dual-point distributor?

You're right about the cam issue, which is why I wanted to convert it to a MAF system but the headache is too much for me, I've got 2 other projects that require my attention. Most likely I'll leave alot of the EFI stuff in there for when I find the proper doner for it later.

Thanks for the help.

Yes, the stock EFI coil will work with the point type distributor. Of course, points are almost obsolete.

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http://performancedistributors.com/forddistributors.htm

Also, there is now an excellent installation article on the D.U.I. Distributor on the Ford-Trucks.com site at:

http://www.ford-trucks.com/article/idx/0/358/article/DUI_Ignition_Installation_In_A_Ford_351W_V8.html

Ignition Lesson of the Month: Hystereses, the difference between the timing as the rpm and vacuum increases to the timing as rpm and vacuum decrease, needs to be kept to a minimum. A precise advance curve accomplishes this.