Bronco ll 1986, roughs great with full tank, very rough with low level in tank

Asked by Nov 15, 2013 at 03:19 PM about the 1986 Ford Bronco XLT 4WD

Question type: Maintenance & Repair

1986 Bronco ll, 2.9L fuel injected., new plugs, dist cap, fuel filter.  Cleaned fuel injectors
and tested fuel line pressure.
Climbs hills no problem with a full fuel tank.  Half full, seems like there is a governer at
3000 revs, oscillates between 3K and 2.8 K.  At a quarter full, seems to almost die, revs
up, drops revs.  No acceleration, only on hills.  My mechanic is at a loss.

4 Answers

26,075

Have you pulled the pump/sender out of the tank to check the fuel pick-up? It's just a light-weight nylon sock on the end of the pump.

1 of 1 people found this helpful.

No, we checked the fuel pump pressure, but obviously not on a hill. I will get my mechanic to do that. We did have a new fuel gauge so years ago, not sure if that was the start of the problem as I normally keep the tank full.

26,075

I remembered the late '80's - Taurus fuel tanks would "oil-can" on a warm day - the bottom of the tank would pooch out and drop the fuel below the pickup tube. They'd run out of gas with a 1/4 tank of fuel on the gauge.

1 of 1 people found this helpful.

That's is the same in my Bronco, I was thinking that the new fuel gauge is set wrong because it seems out of gas at 1/4 full.

Your Answer

Bronco

Looking for a Used Bronco in your area?

CarGurus has 201 nationwide Bronco listings and the tools to find you a great deal.

ZIP:

Ford Bronco Experts

  • #1
    tennisshoes
    Reputation
    430
  • #2
    Js08016
    Reputation
    170
  • #2
    Clayton Cameron
    Reputation
    170
View All

Related Models For Sale

Used Ford F-150
2,829 Great Deals out of 212,223 listings starting at $1,300
Used Ford Mustang
554 Great Deals out of 36,485 listings starting at $1,500
Used Chevrolet Blazer
3 Great Deals out of 924 listings starting at $950
Used Jeep Wrangler
432 Great Deals out of 18,798 listings starting at $2,990
Used Ford F-250
429 listings starting at $2,995
Used Ford Ranger
168 Great Deals out of 5,369 listings starting at $1,250
Used Toyota 4Runner
332 Great Deals out of 25,177 listings starting at $1,750
Used Chevrolet Camaro
455 Great Deals out of 31,181 listings starting at $3,550

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.