flooding in BOTH 1.1SR carbs

[73Manta72gt]

I'm still fighting a flooding problems on both carbs. fuel dribbles from the main nozzle into the venturi. What I've tried...disassembled and cleaned the carbs. I replaced both needle valves and floats. same problem. Then I thought my fuel pressure might be too high, so I set up a can of gas on the roof and just let fuel run in by gravity..still flooding. I couldn't find a float setting in the 69 FSM. Does anyone know how to set the float level on the single barrel solex? Could it be something with the high speed air bleed or the O.E.C.S system causing flooding....Any ideas what to try next?

Thanks for your help.

[kevinfier]

I had the same problem w/ mine, I think there must be a check ball that is not working. I went so far as to pinch off the fuel line and ran it till it died, and it was still dripping down the throat, not a float level problem.
My final cure was an Irmscher SSD intake w/ 40DCOE Weber .
Clean it again and make sure that all passages get blown out.
I would also recommend that you use the 70 FSM for adjusting the carbs. The 69 FSM does not even have that procedure in it. Good luck, and let us know if you get it resolved.
Kevin

[73Manta72gt]

how much was the weber setup? If I can't find one like yours I might change over the the single carb intake..might cut my problems in 1/2 anyway

[petrieopel]

I have the same problem with my dual Weber 40 DCOE's. When the engine is cold the fuel dribbles out of the venturi's but once the engine warms up the leaking stops. I have no idea why it is doing this. Even with low fuel pressure it still leaks.

[baz]

i am not in any way familiar with these carbs but my 1 thought is have a look at the choke system as it is the only thing that a carb has that that adds fuel in a carb

[73Manta72gt]

the choke on my car is a manual cable choke and it's open

[soybean]

I think I remember way back when I had the Solex on the 74 Manta, I had the same problem with it. I think it was something with the high speed air bleed. Try the same procedure for adjusting the Weber carbs. Here's the link to Redlines procedure, just X 2. Hth, Jarrell
http://www.redlineweber.com/html/Tec...lean_best_.htm

[73Manta72gt]

I got a gallon of carb cleaner at NAPA to dunk the parts in and itd remove more junk from the carbs than the spray can stuff. One of carb was missing the "filler rod". I istalled one from a parts carbs. The car runs without flooding now but the idle is too high. I think due to a vacuum leak in the O.E.C.S. The diaphram for this idle control system isn't available from OGTS, so I'm going to plug off all the vacuum lines and see how it work...thanks for the suggestions.

[gr_diver]

I am not familiar with that carb, but aybe it has a power valve that is stuck open, or has a punctured membrane?

[73Manta72gt]

The flooding came back, so I'm going to solder up a power valve from another carb to make sure no excess fuel is coming from there and see how it work.

[gr_diver]

Ok, dissabilng the valve will give you an indication. But verify that you seal the fuel passage of the valve. If you seal the vacuum port, and there are problems with the membranes there will still be a leak, so you might not find the real cause...

In addition, when dissabling the power valve, you should expect a power decrease and possibly bog at high power conditions (WOT, uphill etc.) as the valve is there to keep a main jet just adequate for steady rpms and not heavy acceleration... The power valves add about a +6 sizes main jet fuel, only on demand...

[73Manta72gt]

I disabled the power valve with no luck, but I found the problem. A crack in the vacuum hose to the power brake booster. The carb idles down now without flooding. I guess the vacuum leak combines with a closed throttle plate causes more fuel to come out of the main nozzle and look like it's flooding

[gr_diver]

Good job, glad you found it...

Since you know that there was a vacumm leak present, take 10 minutes of your time, and check for others as well, it makes a hell of a difference in performance if there are absolutely no vacumm leaks...