Welcome Visitor! Please take a few seconds and kevinebass
New Member
- Joined
- Sep 27, 2011
- Messages
- 3
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1984
- Make / Model
- Bronco II
- Transmission
- Automatic
First off let me say hello to everyone. This is my first post and the vehicle is my first BII also, actually it is my son's.
So my Son has an 84 BII with the usual 2.8 and the transmission is the 3-spd C-5. My son and I just finished doing the duraspark conversion so the computer is gone and only now have oil pressure, water temp and alternator wires connected up. I haven't removed the smog pump yet but will soon. We replaced the original carb with a 2150 from an older ford van. It has the needed 1.08 venturi size with a manual choke. My son and I rebuilt the carb and got everything mounted up except the kickdown rod cuz the carb was for a manual transmission and I haven't figured out how to make it work yet, any ideas???
I read everything on this board about timing and vacuum connections and here is what we did. Connected the vacuum advance from the new distributor to the manifold vac on the tree (had it on ported from the carb but it didnt seem to be advancing properly and seems to run better on manifold vac). I read that lots of folks have better luck timing at 12 degrees but found that mine worked best around 10 degrees. It seemed to want to backfire through the carb when I was at 12. Any thoughts on that?
So now that the background is set let me tell you the issues I am having. The carb was rebuilt and we put size 48 jets in it (lots of folks say 50's work best but I am in Colorado Springs at about 6500ft elevation and read that a smaller jet would work better). The issue I am having is I am getting a VERY noticable stumble off the line, to the point it will stall if I don't feather the gas. Once the vehicle is TOTALLY warm it seems to get better but not perfect. I also noticed that if I pull the choke just a bit it doesn't stumble which tells me it needs more fuel???
SO, do you guys think I need bigger jets? Also I have some pics from the durasparking if anyone wants to see.
Thanks guys.
Kevin
So my Son has an 84 BII with the usual 2.8 and the transmission is the 3-spd C-5. My son and I just finished doing the duraspark conversion so the computer is gone and only now have oil pressure, water temp and alternator wires connected up. I haven't removed the smog pump yet but will soon. We replaced the original carb with a 2150 from an older ford van. It has the needed 1.08 venturi size with a manual choke. My son and I rebuilt the carb and got everything mounted up except the kickdown rod cuz the carb was for a manual transmission and I haven't figured out how to make it work yet, any ideas???
I read everything on this board about timing and vacuum connections and here is what we did. Connected the vacuum advance from the new distributor to the manifold vac on the tree (had it on ported from the carb but it didnt seem to be advancing properly and seems to run better on manifold vac). I read that lots of folks have better luck timing at 12 degrees but found that mine worked best around 10 degrees. It seemed to want to backfire through the carb when I was at 12. Any thoughts on that?
So now that the background is set let me tell you the issues I am having. The carb was rebuilt and we put size 48 jets in it (lots of folks say 50's work best but I am in Colorado Springs at about 6500ft elevation and read that a smaller jet would work better). The issue I am having is I am getting a VERY noticable stumble off the line, to the point it will stall if I don't feather the gas. Once the vehicle is TOTALLY warm it seems to get better but not perfect. I also noticed that if I pull the choke just a bit it doesn't stumble which tells me it needs more fuel???
SO, do you guys think I need bigger jets? Also I have some pics from the durasparking if anyone wants to see.
Thanks guys.
Kevin
