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Sat Mar 20, 2010 7:50 am

I have 1967 bug. The carb was flooding but I thought I solved that problem since the car runs now. But I still smell gas in the engine bay. I saw a slow drip at the bottom where the throddle shaft comments to the accelerator cable. While the engine is idling it drips about one drop per ten seconds. Will replacing the O-rings on the shaft fix this or is the drip symptomatic of a deeper carb problem? Thc carb is a stock pict30.

TIA,

crvc

Sat Mar 20, 2010 7:56 am

That symptom is most likely one of three things. Fuel pressure too high, or carb float not adjusted properly(not usually this one), or carb inliet valve failure.

Sat Mar 20, 2010 8:06 am

hey snort.... what about the bushings on the throttle shaft? (keifer fix). Spray some start fluid near the area while the engine's idling and if it revs up, that's the problem.

Fuel Pressure: Any history on the car? Recent fuel pump changes etc? If your any where near Walnut Creek CA, I made up a pressure checker you can barrow or we could check it in my driveway?

Sat Mar 20, 2010 8:53 am

Yes, good idea to check the bushings, but that wouldn't cause the flooding issues if they are still present.(edit) ... which I see may not be an issue anymore?

Sat Mar 20, 2010 9:17 am

The car would run then suddenly die. I took off the oil bath cleaner and watched the carb as the car was idling. Gas would slowly creep up the float vent then spill over and the car would die. The float valve is new. I bent the lever a bit to lower the level of gas in the float chamber. Then I added extra gaskets to the stock fuel pump and that seemed to stop the flooding.

My mistake, it's not the original pict30 carb. Instead it's a two-year old EMPI carb. I've got a pressure guage so I can check the fuel pump pressure. I can try spraying the car throddle shaft with engine starter to see the effect. It seems the shaft leaking is the problem. On the right side there is bronze staining of the carb body around the shaft.

Will 0-rings work at least temporarily? The stock carb needs a rebuild which is why I bought the EMPI carb.

crvc

Sat Mar 20, 2010 9:25 am

hey CRVC.. BTW, my PICT 28 leaks around the bowl top. I've messed with everything, rebuilt it, torn it apart etc. I've had it off/on so many times I've considered converting to over to wing nuts so I didn't need a wrench! Anyway this next week I'll mail it to Keifer. You might consider having him rebuild your solex? I don't know much about the EMPI carbs, and I'm a fan of stay (going back) to stock whenever possible. Good luck!

Sat Mar 20, 2010 9:57 am

Steve is referring to me... I sent you a PM.

Sat Mar 20, 2010 1:53 pm

The fuel pump is delivering roughly 2psi. I sprayed the carb with engine starter as it was idling and the engine slowed down for a minute. I sprayed near the area where I saw the gas drip, around the throddle. Then I sprayed around the vacuum tube which is blocked off. In each case the engine slowed. I assume this means I've got vacuum leaks. But I thought the engine would speed up, not slow down from air leaks. (???)

crvc

Sat Mar 20, 2010 2:28 pm

If the throttle shaft is worn, you should be able to see it wiggle if you push on it.

Sun Mar 21, 2010 7:58 am

The throttle isn't worn enough that it wiggles but I can't see anywhere else where gas would be leaking. I put O-rings in over the throttle shaft and that stopped the drip. But it made the car run poorly. The carb is an EMPI. I've read lots of negative comments about EMPI products and have to believe them. The carb is relatively new. It shouldn't have worn shafts after only a couple year's worth of light driving.

I got the EMPI because gas was leaking into the crankcase. I assumed the original carb was the cause. Now I'm wondering if the fuel pump pressure was the reason. So I put the old PICT30 back in. And it runs well. There is a little staining around the throttle shaft which suggests the 45 year old carb needs repair. But I watched it idle for ten minutes and it isn't dripping gas.

So eventually I'll send it to keifernet. But for now it works. Also I have a PICT34 from a 1975 bug that I can use if necessary.

Thanks for all the help,

crvc