1984 F150 I6 Automatic (C5) TFI Ignition. I have been having trouble with my Ignition system so I decided to try and convert over to the duraspark II ignition.
Replaced, distributor, coil, harness and carb. and unplugged the computer. The carb is the carter one-barrel stock carb for the 84 F150. It is a rebuilt crab. I had a hard time starting on initial startup seemed like it wasn’t getting fuel. When it did start it started with a slow chug and finally caught on all six. After running awhile it was idling good enough to set the timing and things were looking good. When I tried to rev it up it hesitates and didn’t want to come off idle. I tried putting it into gear and it immediately stalled, Turned up the idle speed and finally got it out of the garage. When I tried to drive it was bucking like crazy trying to die when it did it always started right up.
I figured it was running lean. I didn’t see the usual squirt of fuel from the accelerator pump.
Took off the top of the crab only had ½” of fuel depth in the bowl checked the float height readjusted to .781”, Checked float drop 1.5” checked setting of the fuel rod adjusted it per the shop manual (.025”) checked everything over and found the weight that is supposed to be on top of the ball missing Took one out of the old 2150 and reassembled everything.
Really hard to start this time I think it was flooded. Let it sit awhile held the choke open finally chugged to a start.
Idled very smooth. After it was warmed up idle got rough and would stall after about 3-4 minutes. Always restarted fine. If I put it in gear it took the load ok for a minute or so then stall. When I rev it its smooth at high (above 2000 rpm) but at around 1500 it runs very rough but is fine at idle.
Don’t know what to try next. I just replaced the fuel pump about 2 weeks ago. Any Suggestions??