Tom400CFI

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About Tom400CFI

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  • Birthday 05/28/1971

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  1. Yes, I saw it. I was totally "bought in"...until I did this: "I installed a Summit Racing fuel pressure regulator...I re-adjusted the FPR to 1.5 PSI and was unable to reproduce the problem, but the owner took it and it flooded on him -even though line pressure at the carb remained at 1.5 PSI. I don't think that the fuel will force past the needle/seat at only 1.5 lbs" That pretty well eliminates fuel expansion in the line between the pump and carb. At this point, I believe the fuel level in the carb is too high, and the bowl heat soaks after ~5 min, bubbles form, displace the fuel out the nozzle and there is the flooding. More testing to ensue....
  2. I did. Thanks so much for that. I'll re-set the float and see how it runs. If it works, I'll ditch the regulator and try it again. It has an OEM fuel pump. I've resisted installing an electric b/c I don't believe the car should or does need one.
  3. O.K. If that is "the fact"...then could you define it a bit more clearly? What is the heat, soaking? And how is that pushing fuel out the discharge nozzles?
  4. Thanks for the good reply. No, I didn't just rebuild the carb. Customer brought it to me with this "new" complaint. I'm not sure how new the problem really is; he barely ever drives it and doesn't really pay a lot of attention to how the car behaves, so it's hard to get a good feel from the owner about what's really going on, and history. I installed a Summit Racing fuel pressure regulator, set it to 2.5 PSI and still, was able to reproduce the problem once. After shut down, pressure crept up to ~3.5 PSI or so, and the carb flooded the intake with fuel. I re-adjusted the FPR to 1.5 PSI and was unable to reproduce the problem, but the owner took it and it flooded on him -even though line pressure at the carb remained at 1.5 PSI. I don't think that the fuel will force past the needle/seat at only 1.5 lbs, so at this point, I'm thinking it's the float level is set too high. Thanks for the float level spec...that should be easy to check.
  5. How about float level spec/procedure? 1950 Convertible ?
  6. 10-4. I'll look around. Already posted in the Ford section....zero response. 😅
  7. Yep, that method would work too. Good advice. Thanks. I have not confirmed the float level....I don't know the spec or measuring points for this carb.
  8. Update: The thing flooded again, this time with only ~1.9 PSI showing in the fuel line between the regulator, and the carb. Less than 2 PSI. I have a hard time believing that 1.9 pounds is pushing past the needle and seat. Now I wonder if it's boiling in the carb, the volume created by bubbles is displacing fuel enough to raise the level and cause fuel to run out the discharge nozzles? The next test that I'll run will be to run it hard, then pull it in the shop and quick, hurry up and pull the top of the carb off and flip it upside down, before the symptom typically starts (usually takes about 3-5 minutes). Then watch; fuel will either boil/rise in the bowl...or start pushing through the upside down, float/needle/seat. I'll be able to see, which is the issue. I hope. .
  9. Copy that. If the 1.5 PSI set pressure doesn't allow enough "head room" for expansion between the regulator and the carb, then I'll install a filter with a return, like the one shown above, and plumb it back to tank. Thanks for reading and sharing your thought. 👍
  10. Carbking, If you see this, I installed a Summit Racing adjustable FPR in line between the pump and the carb, and set it deliberately low at 1.5 PSI. Just barely enough, in my estimation, to get gas into the float bowl. My hope was that it would maintain the 1.5 PSI after shut down between the regulator and the carb. It tried to, but pressure still crept up to ~3.5 PSI for some reason. IDK why...maybe it's just too much pressure once it boils the fuel in the pump for the regulator to hold it? Anyway, same results after a hard climb and shut down; carb overflowed into the intake. Has anyone tried using the return style fuel filter, and letting that return go back to "tank"? A filter like this:
  11. No kidding!? That is interesting. I'm thinking that having shim stock between the cap and rod might not be a great idea.....
  12. Thanks. That precisely confirmed my hypothesis. In fact, last night as the carb was overflowing in the bores, I loosened the fuel line between the carb and fuel pump; got a squirt of fuel and a "Shuuush" of air. Thanks for the link. Bummer about the problem. The thing needs an "accumulator" in the fuel line to manage that pressure for a few minutes. Or something.
  13. When "hot", run the car, shut it down. ~5 minutes later, fuel starts running from the main discharge nozzle, puddles on the throttle blades and runs out the throttle shaft, leaking onto the intake. Recent fuel pump, Car runs good when running Checked for needle and seat sealing; it seals good. I watched it happen today, engine was 205* F when shut off. What gives?
  14. When "hot", run the car, shut it down. ~5 minutes later, fuel starts running from the main discharge nozzle, puddles on the throttle blades and runs out the throttle shaft, leaking onto the intake. Recent fuel pump, Car runs good when running Checked for needle and seat sealing; it seals good. I watched it happen today, engine was 205* F when shut off. What gives?
  15. Started going after the rods today....most of the nuts were looser than finger tight. I can't believe that this thing was running as good as it did. Crazy.