1986 Bronco Stalling Problem

go to battery store and tell them what type of car or truck you have,
they will look at the chart and tell you what type battery you need.
why do you need certain type of battery: the cold cranking amps for most
trucks is alot higher than for say the small cars like honda civic which
has a smaller engine and probably less accessories.

I have had this problem for 10 years and have finally figured it out. There is an inertia switch under the dash that is supposed to shut the gas off in case of a wreck or something. Well, there is a button attached to it and sometimes it gets loose. If the button is in or out, (I forget,)it prevents the ruck from running. I bypassed this, and now my truck runs fine.
Prior to this, I have replaced the engine, redid the transmition, replaced the distributor, spark plugs and battery, My mechanic ripped it out and bypassed it, (though I would recommend getting a different one, incase you wreck. )

my daughters 1986 ford bronco 2 stalls when it is put in gear or when slowing down at stop lights. have replaced fuel pump and reset fuel shut off valve. any help would be greatly appreciated Paul.

Have you replaced the distributor? I had a similar problem, my Bronco would be running fine, then just quit, if I waited 10-15 minutes it would start back up and run fine again for as much as a month before doing it again. I too replaced several components of the ignition system before finally replacing the distributor.....problem solved.

There are 2 fuel pumps. 1 is a low pressure pump in the tank and the other is a high pressure pump under the driver attached to the frame.

The fuel pump is located inside the gas tank. If you change the fuel pump, you might want to change the fuel filter also.

I have the same Bronco with a very similar or the same problem. Mine will stall after about 25 to 30 minutes of highway driving, especially when it is warm outside but sometimes when it is cold too. I have also replaced nearly all the electrical components in the ignition system. There are two fuel pumps on the 86 Bronco with a fuel injected 302 V8. The pump in the tank is a low pressure pump that sends fuel to a resevoir on the fram rail. A high pressure pump then picks up the fuel and sends it to the injector banks with a regulator that is designed to maintain a constant pressure to the injectors. If you turn on the truck without cranking it to start, you can hear both pumps cycle for a few seconds. When mine stalls going down the highway, my rear pump will run when I turn on the Bronco without starting it but the front pump does not come on until I sit for awhile (maybe the pump is cooling down). A couple years ago, I had the fuel pressure regulator replaced by my mechanic because at that time he said the regulator was causing an over pressure situation to occur at the injectors and flooding the engine. This is frustrating because it almost never happens when driving in town. I am now suspecting the front fuel pump, the vacuum system to the regulator or the rear pump.

I had the same problem, turns out it was a lose wire on the front fuel pump. It is located right under the drivers seat, mounted to the frame. Hope this helps

it sounds like you have a short in it somewhere. when you have it running, disconnect the battery and make sure it still runs. The alternator should keep it running. My fuel pump is on the side of the motor. The only time I have ever had a problem, gas started leaking from the back side of my fuel pump and into my oil. I changed out the fuel pump and never had another problem. It sounds to me though that you are losing power somewhere. Check all of the wiring and make sure there is nothing loose or pinched.
I will try to post more later, I will go out and look at mine and get some ideas for you.