build thread for 2.8 carb to chevy tbi.

[cammeddrz]

I bought an 84 or 85

my bet is that it was an '85

rico's 84, and another user who lives by us also has an 84. they both have like a 3" opening on the tank.

I have owned (2) '85 bronco IIs. and they had a larger diameter opening.

There are two filters between the tank and the low pressure pump.

not a mechanical diaphragm pump, so that is an apples-to-oranges comparison

I believe the ranger used a similar frame mounted high pressure pump from 86 to 88/9

this is the exact same pump, that we are using as the high-pressure for the tbi

 

[dangerranger83]

Simple solution here. I'd there fuel in the line before the filter you added? If not, problem is before that. If so, there fuel after the filter, not, the filter is clogged.

Same solution applies to the mechanical pump and electric pump.

Also don't forget, Ford used plastic fuel lines from the tank to a certain point to the mechanical pump. If one of your lines has a crack in it to the mechanical pump, there's a chance is acting like a valve and sucking in air but when the suction is gone, the crack closes up.

Now another easy solution for a low pressure pump is too go to auto zone, get the mr.gasket 12s pump they have sitting in their shelf and wire it up. Good part is the frame already has holes to mount it at the required 45 degree angle. You just need to take the mechanical punk rod out and make a block plate.

Here's a picture of it on my truck, didn't have to drill any holes. Yes it's feeding a carb but they are used for that and assisting high pressure pumps.

Also when was the last time your tank got cleaned out? Last time I looked into an original 84 ranger tank, nothing but rust on the bottom and ended up getting a new tank (dads old 84 ranger).



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[cammeddrz]

putting a non-diaphragm fuel pump in a situation where it needs to draw the fuel upward vertically will cause premature pump failure. no ifs, ands, or buts about it.....period

this is also why aftermarket fuel cells have outlets in the bottom. if you were supposed to use an aftermarket pump by sucking it out the top, fuel cell manufacturers wouldn't waste their time with ports on the bottom

ask yourself "did ford (or any other manufacturer) do this from the factory?...."

nope, but they did use a diaphragm pump, because it is capable of generating suction. this is because impeller-style electric pumps are not designed to have any suction

when it comes to getting fuel out of the tank. either use gravity, or a diaphragm pump. these are the 2 ways that work properly, and that is why for the last 90+ years of automotive manufacturing these two methods are the only ways used by manufacturers

 

[Lil-Pony]

I actually have steel lines as far back as i can see. I will remove the filter and place it after the mechanical. I think having the filter higher than the tank could be causing an issue. Put a new tank in it 2 yrs ago and check it 3 months ago and it still shines. If anything ill replace the me mechanical pump, on another note i always had vapor lock issues, and i thought efi would rid those issues. But the truck was cold when i tryed to start her so it couldnt be vapor lock, could it?

 

[dangerranger83]

The pump I'm using is designed to do this. Instructions say mount as close to the task as possible since electric pumps push fuel better then pull.

A coupe other guys on here are running this exact pump and have had zero issues and they are feeding their 5.0s and mine nicely.

Now of you want to go to a single pump setup, like my dad did with his tbi setup, then get a plastic ranger tank from a second gen ranger and use that, if you are doing this to a ranger. Not exactly bolt in, I made custom tank straps out of some flat steel and used old conveyor belt as padding between the strap and the tank.

He got his out of a 4 cylinder, not that it matters, still put out 44 psi. Only thing is the fuel gauge didn't read right but a change in resistance should fix that in the electric setup and also a change in filler neck.

If it's not fuel its getting, then it's a simple thing.

Also the plastic line that ford used its black and runs right out of the tank and just under the cab. But we used brake line as a cheap high pressure fuel line and worked nicely.

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[Shran]

I am really excited about this TBI swap (although it's not really a new concept.) Cool to see that you have actually done it.

I am thinking about doing the same thing with 454 parts to fuel inject my 460 if I can find everything I need for the right price. The truck already has electric in-tank fuel pumps so that simplifies my install quite a bit.

 

[Lil-Pony]

Now that would be really interesting.

 

[Shran]

I think so, it seems to be the ONLY cheap viable option for big block injectin'. There is always the Holley and Edelbrock kits, or just a full blown upper end factory parts swap from an EFI truck but my gawd all of that is expensive.

The Chevy stuff would be cheaper and I wouldn't have to swap heads and/or intake - just a TBI to 4bbl adapter (which are readily available.)

 

[Lil-Pony]

Pull the trigger. That should be easy no custom stuff to make.

 

[Lil-Pony]

How do you remove the mechanical pumps push rod.

 

[RICO9]

Nothing holds it in, it should slide right out. Maybe you could try a magnet.

 

[Lil-Pony]

Ok I'm going to pull my pump either tonight or tomorrow, just wasnt sure since I've never pulled a mechanical pump before. Thanks for the info and ill report back what I find.

 

[Lil-Pony]

Went electrical, mounted it within 16" of the tank

And couldn't figure out any other way to make my block of plate dry any faster


She runs great and starts right up, but Bogs down when she gets warmed up. Going to have to figure this out, hope its note b/c I deleted the egr and air

 

[Lil-Pony]

I just thought, could it be the o2 sensor

 

[Lil-Pony]

m thinking once the engine warms up and starts reading the o2 sensor things get all hay-wired and what not.