34 PICT 3 leak

[Amskeptic]

Latest post of the previous page:

My '71 Beetle had a loose throttle shaft that would drip gas on both sides of the carb. I sent the carb body off to this guy and he installed new bushings. $60 and no more leaking! He's in Georgia, which might be convenient for you!

ONCE AGAIN, leaking at the bushings is just a SYMPTOM!
Sure, the gas now leaks solely into the intake manifold where it can now strip the oil film off the cylinder walls at start. Hey but we can't see it, must be fixed.
Colin

[vwlover77]

After heat soaking for a while after a long drive in hot weather, the 34PICT3 in my Beetle always leaks fuel into the intake requiring lots of cranking and full throttle to restart the engine. I've checked the needle valve and float level, and installed a fuel pressure regulator, but there seems to be no cure.

[Amskeptic]

After heat soaking for a while after a long drive in hot weather, the 34PICT3 in my Beetle always leaks fuel into the intake requiring lots of cranking and full throttle to restart the engine. I've checked the needle valve and float level, and installed a fuel pressure regulator, but there seems to be no cure.

We have discussed this, but I can't remember where . . . Fuel Delivery Forum?

Anyways, the factory fuel pumps had a cut-off valve that prevented this heat soak fuel expansion pressure increase. I have battled exactly the same thing with Chloe's junky Barzilian pump, and have a used Pierburg factory-issue fuel pump that shall get rebuilt and installed.



I think it was in 1971 and later buses and beetles that had some crazy bypass/cut-off dangling off the pump:



How can I make this information stick?
How can we obtain these factory solutions, install, and show the world that they work?
ColinHowCanIDryMySocks?

[hambone]

Huh there sure was some weird hardware in the 70s....