I replaced my starter, fuel pump, coil, and solenoid about a month ago. It was running fine after that for a few days then the temp skyrocketed on my 10 minute commute. I did not have time to work on it for about a week. I put some water in there and it did not get hot so i thought i was golden. then the real problem showed it's ugly face. while I was driving last weekend , I stopped for a car that was turning left and when i went to start again, it slammed and made a loud click. The kind it makes when your fuel pump is bad. I pull over and rev it up for a second and it is fine. Runs fine for half an hour and then it gets even worse. every time i push the gas more than a little bit, it acts like it is not getting fuel especially when going up hill. The idle had also been a little rough lately, but nothing terrible.

It is an '81 with a motorcraft 2150 carb and a mechanical fuel pump. Could it possibly be the timing chain slipping making the idle rough and the fuel pump not pump fuel? There is probably a reasonable explanation, but it seems to me that Bronco gods are just mad at me for letting the temp get high.

sorry for the long post

 

Have you pulled the pump to inspect the lever? I am assuming its a typical mech. pump with the lever that rides a cam to operate it. Other than your theory about jumped timing, thats where I'd start.

 

Well, if u just replaced the fuel pump a month ago, I'm guessing thats not it. Have u checked your fuel filter to your carb, or maybe u have one before your pump? If the filter is good, then I would check the carb for maybe a stuck float. Tale off the carb's fuel bowl and clean it out with carb cleaner. Then check to see if the float assy is sticky or whatever.

 

After what I read, I would have to agree with breystreak....the "slam" would have me believing that something physical may have happened to the lever to the fuel pump. That is if its the type I think it is.

 

I replaced the Dist. cap and that seemed to get rid of it. I am not sure because it did not act up last time until it had been driving for about an hour. I plan on taking it out this weekend and possibly taking off the carb and maybe the fuel pump and checking everything out. The old cap was pretty corroded and I am still waiting for the rotor to come in. Hopefully it is fixed for a week or two. Thanks for the help.