Carb Flooding

[mat in tn]

I think something is getting overlooked. first off, the last two carbs worked, then they didn't. what changed? if each carb was compatible with the fuel pressure at any point and also for a length of time then we should expect compatibility. I start with filter. then float level.  the gaskets will reduce heat absorption and control manifold vacuum leaks, but I doubt that's the issue here.

[ArdWrknTrk]

I have to agree with Mat.
Covering up the symptom is not fixing the problem.

[Gary Lewis]

I agree. That’s why I mentioned the junk and filter. But on new tanks, valves, etc it would seem that it came in with the fuel?  Like gum?  I’ve seen that happen, for sure.

[ArdWrknTrk]

A Carter YF is as reliable as a hammer.

It's hard to imagine that CJ has gone through 3 carbs and a fuel pump given that everything upstream is new.  

Really the only 2 things that could cause flooding are too much pressure or a bad float/valve.

[Gary Lewis]

Dirt or gum in the gas can easily cause a carb to flood. It gets on the needle and prevents sealing so fuel continues to flow. That’s why I use at least one paper filter as they will filter much better than the stock metal filters that might take out gnats.

[ArdWrknTrk]

If you want a plastic filter put it in the rubber line between frame rail and fuel pump.
The exhaust is on the other side so there's very little risk.

I haven't had problems with metal 'stone' type filters at the carb inlet, but I drive enough that my fuel doesn't go bad.

[grumpin]

A rubber hose breaking down from ethanol fuel?

[C.Jett]

Thanks Guys for all the input, since it’s 2 carbs doing the same thing, it’s either gum or pressure. Fuel goes thru 2 filters before carb, I’m going with pressure. Pressure is 7 psi, that’s the max recommended. Pressure regular set at 4.5-5 psi? I will open carb,(when it quits raining), to check for gum and float setting. Thanks to all for helping old guy think again.  CJ

[Gary Lewis]

Gum is hard to find.  I had some years ago that coated the needle time after time in spite of running a whole bunch of carb cleaner in the gas.  I took the carb apart and cleaned it multiple times, but it took running that tank out and getting well into the 2nd one before things lined out.

[mat in tn]

one difference between the carter yf and a hammer is that the hammer never has its baseplate screws lossen up

[C.Jett]

Gary, will this work? It’s from Summit Racing, SUM-G3032B. 4.5-9 psi. My reason is that it’s black. It has 2 outlets, can one be used for gauge? Should I set it at 4.5 and try that? Thanks CJ

[C.Jett]

Mat, depends if its a wood handle or not. CJ

[Gary Lewis]

Yes, that'll work fine.  And yes, you can put a gauge in one of the outlets.  Set it to 4 1/2 or 5 and give it a try.

[C.Jett]

Thanks Gary, will get it on order. Let you know how goes later. Thanks CJ

[mat in tn]

touche

[C.Jett]

 Got it done! Made a bracket to bolt on head and factory bracket. Will see how it goes. CJ.  The fittings cost more than the regulator……

[mat in tn]

that looks very well done. do you know the pressure setting? I am very interested in whether this helps. I have been driving the same truck with the same engine as yours since 1991 yet never had the issue that you have. this leads me to think that pump pressure is not the issue, but no one can argue with success. drive it and see.  

[Gary Lewis]

Looks good!  Hope it fixes the problem.  

[C.Jett]

Thanks Mat, the instructions said the regulator was set at 6.5 psi but my gauge says 4.0 psi,  while  my gauge read 7 psi before, unless my gauge is wrong. Gary and I think 4.5-5 psi should work fine. I will check with another gauge later. It seems to run fine. CJ

[Gary Lewis]

You won't hurt anything by running the pressure low.  Worst case is that you run out of go at high RPM, but how often do you spin a 300 six to high RPM?