Weber woes, Please save me from insanity Options

[wbgoggans]

I’m at my wits’ end with my Webers.

They’re a pair of Spanish 44 IDFs. I’m running a fuel pressure regulator set at 2.5 psi, have set and verified float levels at least half a dozen times, and have rebuilt them again, and again, and then again for good measure.

Despite all of that, I’m still getting fuel in the crankcase.

For the life of me, I cannot figure out where the fuel is coming from. At this point, I’m so frustrated that I can’t tell up from down anymore, and I don’t feel like I’m following a logical diagnostic path.

Before I bite the bullet and spend $1,000 on a new set of Webers—or $400 on some Chinese knockoffs—would anyone be willing to take a look at these carbs? I’d be more than happy to pay shipping both ways and compensate you for your time if you can figure out what’s going on.

I’ve got a serious case of sunk-cost fallacy at this point, but more than anything I’d just love to understand what I’m missing so I can finally sleep at night.

For those about to suggest the basics: fuel pressure has been verified at 2.5 psi, float levels have been set and rechecked multiple times, the needle and seats have been inspected and replaced, and the problem persists. The fuel tank sits lower than the carburetors, so gravity feed should not be a factor.

Thanks in advance for any help or suggestions.

[Jack Standz]

How do you know fuel is getting into the crankcase?
What are the symptoms?
Have you looked down the throats with the fuel pump on and seen fuel dribbling into the motor (and then the fuel is getting past the rings into the crankcase?)?
Maybe the float is set so far off that the needle/seat doesn't close and the bowl(s) overflows? What are the floats set at?

You would think that if raw fuel was getting into the cylinder from high pressure over powering the needle/seat, the motor would hydrolock. Not good and not really what you described.

There have been times where incorrect plumbing has caused a similar problem with cars we used to own. Had a Toyota Celica GT we bought with a motor so full of gasoline that the motor would not turn. Smelled terrible, like fuel (IMG:style_emoticons/default/smile.gif) . Drained the "oil" which was mostly gasoline, flushed with some fresh oil and she was fine.

Maybe fuel is coming in via an incorrect fuel line attached to a stuck PCV valve or something? Just guessing here. That's unusual for significant fuel to make it to the crankcase.