Bronco II died one day

[bronc]

My BII with 4.0 died one warm day while at a stop light. It went down to like 400 rpm and idled rough there. Hitting the throttle did nothing. Then eventually it quit. You could start it and it would do the same. After sitting for a few hours, it started and ran fine. I am not sure how to troubleshoot this when it is intermittent like that. I have what I believe to be a leaking valve seal on Cyl 1 so it burns oil but I can't see that doing anything to cause this. I would believe it to be fuel or spark. My first guess would be fuel. Maybe the fuel pump is on the way out? Any ideas here guys?

 

[bronco_lou]

When it died and would not start did you check for spark? It could be the pump goes on the blink some times. I had an 87 Z24 that would sometimes just idle no matter how much gas I would give it, 10 mins later it would run great. Turned out to be the fuel pump. A slow idle and then nothing sounds more like a fuel issue than spark issue.

Louis

 

[Hotrodlincoln]

Sounds like fuel. Hard to say for sure though. Wait until it does it again and smack the bottom of the fuel tank a few times with a mallot. If that helps/worsens it, good bet the pump needs replaced.

 

[bronc]

I am having trouble disconnecting my fuel filter from the SS line going to the motor. The other end was fine. I remember changing the fuel line from the filter when I did my swap to 4.0 from a 91 Explorer. I am not sure if maybe the fuel filter is different from 91 ex to 89 BII and that's what is giving me the problem. I read the following link, I bought those plastic things but no help, there is no room. See my picture and let me know what you think.

http://www.therangerstation.com/forums/showthread.php?t=11165&highlight=change+fuel+filter&page=2

 

[bronco_lou]

Your in for some fun, that is the wrong type of end plugged onto the filter, The way it came from the factory was a plastic end with a clip you slide out to get the line off. There are little fingers inside the end of that clip, to get it to release your going to cut that end of the filter off down to the tube part and hope you can get a tool in it to release the tube.

Louis

 

[bronc]

That's exactly what I thought. I was at ford today and asked to see a 91 explorer filter, it's the same as the 89 BII but with longer ends. So I bought the correct one so next time it will be easy. I actually have the tool, as soon as I went out to look in my tool box and saw the tool, I remembered using it on the Ex to take that line off when I swapped. So I will be cutting the filter off the access the end of the line to use the tool to get it off. Wish me luck.

 

[bronco_lou]

Well the worst that could happen is you might have to replace that line, I don't know if you have a pull a part close to you but here in columbia, sc that fuel line cost about 3 or 4 bucks.

Good Luck,
Louis

 

[bronc]

Got the old off and the new on. Not sure if it fixed my problem yet, I didn't have time to go for a rip tonight but it starts and runs.