has anyone ever replaced the in tank pump on a 88 bronco 11 w/ an aftermarket pump mounted near the tank. I seem to have trouble w/ the in tank pump constantly going bad, then my bronco will run a couple of hours before it dies (no fuel) after it sets about 30 minutes it will start up and run then do it again. Then i replace the tank pump and it's good for a few months then bad again. I use my bronco on a rural mailroute so it's pretty abused, runs about six hours straight. Also in reference to the fuel filter cannister (the plastic one) I have had several bronco 11s & none of them had a filter cartridge in that cannister.

 

I would try a locking gas cap. Then drop the tank and see if there is anything in there the pump is sucking up and clogging the filter on the pump.

Is your gas straight gas or do they add ethanol to it?

Maybe you have a water problem with your local gas. That would kill a pump sucking it up from the bottom of the tank all the time.

 

i just finished a finished a vertical learning curve with this very same thing on my '86 BII, we were suffering from vapor lock, we live in yuma,az where it is over 100* deg.f every day from may until september. the rear filter housing is ALSO the low pressure fuel regulator, by design it returns extra fuel, not needed by the hi pressure pump, to the tank. when the lo pressure regulator fails, it returns more fuel to the tank and starves the hi pressure pump, allowing vapor lock or a fuel starved condition on the fuel rail. ford quit using the insert filter in '87 or '88, and went to an in-line filter, however, they continued to use the filter housing, (called a reservoir now) and it's internal low pressure regulator for another decade on virtually all of they're f.i. autos. i just bought a brand new one at my local ford dealership $43. which also makes it the cheapest part on the fuel injected system (except the filter). they sell 1-2 reservoirs a month here, and the dealership doesn't even work on anything that old! so it is ALL over the counter sales. at the local pick-a-part, there are 4 f.i. BIIs, 3 have had the rear filter housing/low pressure regulator removed. a coincidence? perhaps not. good luck

 

> they continued to use the filter housing, (called a reservoir now) and it's internal
> low pressure regulator for another decade on virtually all of they're f.i. autos

Didn't know that. Might be worth a trip to the junkyard just for a spare.

 

Thats good to know, it does seem to happen only in the summer.

 

I'm wondering if it would be easier to just remove the canister / filter / regulator and splice the fuel lines.... I don't see a reason for a low-pressure regulator for the in-tank booster pump. Maybe this is the reason for hard-starting issues due to fuel pressure dropoff.... interesting info, nonetheless.

 

1988 Bronco II

What have you been buying for replacement pumps? Made in China aftermarket junk? Used?

The original in tank pump is still available from Ford. The pump includes the fuel gauge sending unit.

E8TZ9H307E .. Fuel Tank Sender & Pump Assy.

FTE sponsor DIRECTFORDPARTS shows the pump assembly at $206.18 List / FTE member net: $145.33

 

i seriously considered this very thing, but decided the origional arrangement worked well for 20+ years and 200,000 miles, who am i to mess with success?

 

Yes i did buy one at oreillys probably chinese , the one that went bad was from napa, probably all made in china, next time i'm going to use an aftermarket pump & just replace the plastic fuel line w/ rubber fuel line on the low pressure side

 

> I don't see a reason for a low-pressure regulator for the in-tank booster pump

From what was posted and from what I have looked up in the factory manual, the low pressure regulator keeps the cannister full so the high pressure pump does not starve, then vents any extra to the tank.

I guess when it goes bad, it just lets everything by or nothing at all?