Dual Weber IDF 40s, Carb Rookie question... Options

[malcolm2]

Hello everyone. I will preface by saying that this is an engine from a 914. (IMG:style_emoticons/default/piratenanner.gif)

But it is in my VW Bus. Just now getting it moving down the road. Everything is new.

Carbs are new and I am a carb rookie, as well. Bought them from Aircooled.net and had them cleaned and set-up for the bus. My 914 has L-Jet FI, this group has taught me enough about that system to be dangerous.

So here is my question for the carb experts. What should the Pump Valve spray look like? It seems erratic and drippy. It kicks in 1st as I open the throttle, not a spray but pore, really. I will say that I see that in all 4.

[Jack Standz]

Yes, fuel pressure could be the problem, if you truly are having little or none.

I recently had a problem where the fuel pressure gauge was showing zero and the regulator made no change to the reading turned all the way in or out. The motor would run. But, it wouldn't run right or wouldn't take a tune. Since the motor would run (some), I just couldn't believe the gauge.

Completely new fuel delivery system, new carbs, new motor. Turns out the fuel line was kinked under the tank (914 versus bus). Seems that some fuel could make it through. At least the first carb in the set was gettingsome fuel. Bus fuel lines are different, but I suppose something could pinch it.

Probably not your problem, but worth checking. Especially since you said the gauge goes to zero. But, it could be just the gauge. I bought a second gauge ($15 on Amazon) that also showed zero before I figured out the fuel line was pinched. When you get it figured out, run with 3 psi or less, as long as fuel isn't dribbling out the auxiliary venturis. My 2056 likes about 2.5 psi give or take.

If you want to tune these carbs, suggest getting a colortune spark plug (Google it) and a wide band AFR gauge (you decide whether to permanently mount it or not. If permanently mounted in a bus, you'll need the longer wiring harness.