Ford Bronco 2 will run but when on the road the engine will stall out. What is the cause of this?

I have an 88 Ford Bronco 2 4x4 2.9L V6 with a rebuild engine and transmission. This problem started in the summer while on the highway I notice that at first the gas pedle felt loose then the engine light went on and I lost accleration. At first I when I tried to get it to start it would turn over but would die. But it started up the next day and didn't have a problem until it happened again. I replaced the ignition modular, gave it a tune up, replaced the battery, and replaced the fuel pump in the gas tank. The problem still persists and to make it worst its intermittent which makes it difficult to find.



I was wondering if it could be the computer for the truck and how I could troubleshoot it.



Thank for any help.Ford Bronco 2 will run but when on the road the engine will stall out. What is the cause of this?i had a 1978 ford that did same thing, i don't know if your vechicle has the same type of comp. but i had mine replaced and never had problem again. save yourself heache and money and have it replaced. leastways if it still does it, you will know what you replaced.Ford Bronco 2 will run but when on the road the engine will stall out. What is the cause of this?
YOU NEED TO CHECK THE IGNITION CONNECTION ON THE IGNITION SWITCH. THE BLACK CONNECTORS GETS HOT AND LOSES CONTACTS.

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Ford Bronco 2 will run but when on the road the engine will stall out. What is the cause of this?checkyour timing it may be off if you had it rebuilt it could be off or the teeth on it could be shot
My first car was a 86 Bronco II I got from my older brother. Try replacing the emergency fuel cut-off switch. We had to replace mine twice (before I got it). For some reason alot of them mess up. They trip when they shouldn't. We kept thinking it was the fuel pump until a friend of ours told us that he had the same problem a few years before. I would talk to a good mechanic friend first, because I cannot remember what the labor was like for the "procedure", but the price of the part isn't bad when you get it from a salvage yard.Ford Bronco 2 will run but when on the road the engine will stall out. What is the cause of this?mechanic,,, check it,Ford Bronco 2 will run but when on the road the engine will stall out. What is the cause of this?
check the timing it is to far advance retard the timing some check with timing light
your fuel sensor is bad are has a bad connection.Ford Bronco 2 will run but when on the road the engine will stall out. What is the cause of this?
Timing has nothing to do with an intermittent stall problem.

I would guess a fuel cut off switch would stay off till it was reset.

A "mechanic" would have a tough time with an intermittent problem. Thy get $60 / hr. in my neighborhood.

does this happen more in summer than in cooler weather ??

I don't know how your temps. are as I don't know your location but will try a little guesstimating here. The clue was summer, I would offer you are experiencing "vapor lock",all the symptoms point that way. It is caused from gasoline overheating and vaporizing in the fuel line. Trace your fuel line from the carb.,I am guessing you have one on an 88, and see if it comes near the exhaust manifold at any point. If so you need to put some metal cooling fins, two or three, in the area. Metal paper clamps or aluminum clothes pins or some such. Something to remove the heat from the fuel line.

When it stalls immediately put some water on the fuel line and it should start as soon as you cool it .. Get a squirt bottle, like you use for window cleaner, and put water in it.
Yep it could be the emergency cut off switch. Sound like you did some unnessary parts replacing.

Or it could be they fuel pump relay. If they start going bad they heat up and stop working. Then cool down and work again. Get they relay replaced. It's cheap and it's probably 20 yrs old anyway. Replace the relay 1st. Then get the switch checked if the relay didn't fix the problem
sounds like its the igntion module it get warm then turns off thus shuting down the motor
I'm thinkin' you should take it to dealership and have computer tested or see what they think
Im gonna say you have not ckd to see if all the ground for your sensors or the ecm got put back where they belong or they could be loose.another thing a open or intermitent throttle positionig switch could be causing your problem.

why dont you try startin g it up and then move your harness around by the module by the distributer or the throttle switch.if it makes it quit ck your connecters.another thing that will make it quit is if your oxygen sensor wiring is making contact with the exhaust,if its just intermitent its good to ck that.

brain failure on these is seldom,usually if it fails its due to wiring exposed causing it to short out or if it someone welded something on youir truck without disconecting it first