Took the B2 out on its maiden voyage...

[rusty ol ranger]

and damn it runs and drives so much better then the ranger ever did. lol Cruised 55-60 no problem, no pulling or drifting or drama No ticking...which is nice. Seats are comfy...

But there is one problem i wanna run by yall...

The fuel system on this thing is rigged. Dude has the factory line vinyl fuel line from the tank hooked to a rubber hose, into a fuel filter, then more rubber hose to vinyl up to the high pressure pump...after the high pressure pump theres no fuel filter...which there should be (atleast on every other 80's RBV Ive messed with), but past that its pretty factory looking.

Anyways...the issue im having is like when youre accelerating and hit 2nd, and then 3rd, it kinda feels like its starving for fuel. I know its really felt uphill. Not like its going to die it just kinda flatspots out.

I noticed some of this activity at full throttle too.

Could this be the result of the fuel resivor being MIA? Or possibly something else? It runs about like new in every other scenario. However it seemed to get worse after i drove a while....so maybe the high pressure pump is weak? I checked pressure cold and it was 32ish.

Please advise on this lol.

 

[franklin2]

Do you have access to a factory fuel reservoir? I would install it. You can put a filter inside of it. Then get rid of all those other filters.

 

[rusty ol ranger]

Do you have access to a factory fuel reservoir? I would install it. You can put a filter inside of it. Then get rid of all those other filters.

Theres only one filter....the one between the tank and hi pressure pump....where the resivior should be.

Im could pull the one off rusty #1....just wondering if im on the right track before i go through that hassle.

On a 2nd thought...would EGR issues cause similar driveability problems? I had a couple codes related to the solenoid and position sensor...but i changed the solenoid with a used one and cleared the code but tht code stayed gone.

 

[alwaysFlOoReD]

I've run with a fuel pressure gauge attached and the gauge part taped to the windshield. Then I can see pressure as I'm driving.

 

[rusty ol ranger]

I've run with a fuel pressure gauge attached and the gauge part taped to the windshield. Then I can see pressure as I'm driving.

i might try that

 

[lil_Blue_Ford]

So… I will say I’m not a fan of the 1st gen’s fuel system. When I fix my 88, I’m going to a new plastic tank and converting to a second gen fuel system.

Could be one or both of the pumps getting weak or a restriction in the system somewhere. Could be something else. Best way would be to figure out if your pressure is good or if it falls off or something. Personally, if I checked fuel pressure and had a problem there, I’d trash that whole mess of a system and go second gen.

I will also say that my Choptop ran pretty good. When the steel tank started leaking, I bought a plastic tank and was going to use my old pump until I saw how crusty the lock ring was. I haven’t gotten around to changing the fuel filter yet and it runs noticeably better than it did on the old pump…

 

[rusty ol ranger]

So… I will say I’m not a fan of the 1st gen’s fuel system. When I fix my 88, I’m going to a new plastic tank and converting to a second gen fuel system.

Could be one or both of the pumps getting weak or a restriction in the system somewhere. Could be something else. Best way would be to figure out if your pressure is good or if it falls off or something. Personally, if I checked fuel pressure and had a problem there, I’d trash that whole mess of a system and go second gen.

I will also say that my Choptop ran pretty good. When the steel tank started leaking, I bought a plastic tank and was going to use my old pump until I saw how crusty the lock ring was. I haven’t gotten around to changing the fuel filter yet and it runs noticeably better than it did on the old pump…

This has a new tank and intank pump. The high pressure one looks....old....but it sounds healthy.

My fuel pressure gauge is to short andnthe way its made i think itd be a pain to keep an extension from leaking, autozone rents one with a pretty good sized hose...maybe ill try that.

How yall fitting the hose through the hood? The gaps not that big, or you just pulling the hood off?

 

[lil_Blue_Ford]

This has a new tank and intank pump. The high pressure one looks....old....but it sounds healthy.

My fuel pressure gauge is to short andnthe way its made i think itd be a pain to keep an extension from leaking, autozone rents one with a pretty good sized hose...maybe ill try that.

How yall fitting the hose through the hood? The gaps not that big, or you just pulling the hood off?

New, unfortunately, doesn’t always mean good.

Personally, I’ve never routed it where I could drive and see it. I just hooked it up and had someone start it, let it come down from high idle for a little to make sure it stayed steady, then had whoever started it pop the throttle a few times. If you’re having a problem, it should be noticeable at one of those points.

My Choptop I never checked because I didn’t think I was having a problem. Apparently I was.

 

[alwaysFlOoReD]

I didn't have a hood at the time.

 

[franklin2]

I run the hose out of the back of the hood. You could try closing your hook to the first notch, the safety catch, and see if that would give you more room. If that scared you, you could probably hook a bungee cord underneath the hood and reach from underneath the truck and attach it.

When I do these test, I don't have a official fuel pressure gauge. I just have a regular pressure gauge, probably for air or water or whatever I have laying around. I take the Schrader valve core out of the test port, and then slip a rubber hose over it with a hose clamp. I can make this hose as long as I want. I then do the same for the gauge, I can use a hose barb on that end. Nothing bad has happened yet.

 

[franklin2]

So… I will say I’m not a fan of the 1st gen’s fuel system. When I fix my 88, I’m going to a new plastic tank and converting to a second gen fuel system.

Could be one or both of the pumps getting weak or a restriction in the system somewhere. Could be something else. Best way would be to figure out if your pressure is good or if it falls off or something. Personally, if I checked fuel pressure and had a problem there, I’d trash that whole mess of a system and go second gen.

I will also say that my Choptop ran pretty good. When the steel tank started leaking, I bought a plastic tank and was going to use my old pump until I saw how crusty the lock ring was. I haven’t gotten around to changing the fuel filter yet and it runs noticeably better than it did on the old pump…

What did they do to that later system where they did not need the fuel reservoir? I see they went that route but can't figure out what they did to keep the pump supplied when the fuel is low and going around corners.

On most of the later model vehicles I have worked on, they have a plastic can that surrounds the fuel pump assembly, and it tends to mount pretty solid against the bottom of the tank, creating a "chamber" of sorts that surrounds the pump pickup, with a couple of slots here and there. And the return line dumps into this chamber, sort of the like the reservoir works.

Do all the second gen systems have plastic tanks? And do the plastic tanks have some sort of baffle in them or something?

 

[Curious Hound]

How yall fitting the hose through the hood?

Just drill a hole. It will eventually get rusty and blend in with everything else.

 

[lil_Blue_Ford]

What did they do to that later system where they did not need the fuel reservoir? I see they went that route but can't figure out what they did to keep the pump supplied when the fuel is low and going around corners.

On most of the later model vehicles I have worked on, they have a plastic can that surrounds the fuel pump assembly, and it tends to mount pretty solid against the bottom of the tank, creating a "chamber" of sorts that surrounds the pump pickup, with a couple of slots here and there. And the return line dumps into this chamber, sort of the like the reservoir works.

Do all the second gen systems have plastic tanks? And do the plastic tanks have some sort of baffle in them or something?

So, they did nothing in the tank. You just have to make sure there’s enough gas in the tank. I was actually disappointed that there wasn’t any sort of baffle in the plastic tank that I bought (MTS). I may try contacting them before I buy another tank.

Second gen Bronco IIs used the same tank as the first gen’s. Same steel tank. Well, for the EFI trucks. The 83/84 had a different tank, IIRC. Plastic was never in the B2 except aftermarket. I’m a little annoyed that my 1950 farm tractor has a baffled tank and a sump, but it’s something not common on cars until mid 1990’s.

The only reason I recommend switching a 1st gen EFI Bronco II to the second gen’s fuel system is because it simplifies the fuel system. One pump, one fuel filter, less connections to leak and less electrical to worry about.

 

[Terrys87]

My 88s have the fuel reservoir. I had a bad one and opened it up and no filter inside. I have read that some do, maybe year specific. I have read it is just a reservoir and you are correct that there should be a filter after the frame mounted pump going to the engine. I too am eventually going to a one pump system in the tank.

87 does have the EGR, I dont see why you cant make a block off plate at the manifold and that would/should remove the EGR out of the troubleshooting step. I have made block off plate from a soda can in the past.

 

[rusty ol ranger]

So, they did nothing in the tank. You just have to make sure there’s enough gas in the tank. I was actually disappointed that there wasn’t any sort of baffle in the plastic tank that I bought (MTS). I may try contacting them before I buy another tank.

Second gen Bronco IIs used the same tank as the first gen’s. Same steel tank. Well, for the EFI trucks. The 83/84 had a different tank, IIRC. Plastic was never in the B2 except aftermarket. I’m a little annoyed that my 1950 farm tractor has a baffled tank and a sump, but it’s something not common on cars until mid 1990’s.

The only reason I recommend switching a 1st gen EFI Bronco II to the second gen’s fuel system is because it simplifies the fuel system. One pump, one fuel filter, less connections to leak and less electrical to worry about.

Yeah....the low fuel thing was my inital thought when i took it out for a blast down the dirt road right after i got it running and it was having these issues. But now its legal i stopped and put like 30-35 bucks in it (half tank) and its still doing it.

I repulled the codes last night...STILL cant get any KOER codes...and code 31 and 84 are back on the KOEO test. Which both pertain to EGR. Its running the ECM that was originally in my ranger as the bronco's ECM wouldnt give me any codes and it had a weird surge at just above idle....this ECM took care of it.

I dont know i just wonder if that ECM is garbage too.

If i get time today ill poke around some more at it....but IIRC those were the same codes my ranger kept throwing with that ECM and it wouldnt KOER test either.