Porsche 914-4 Weber Carb running rich, Weber Carb running rich on #4 only Options

[mturner7]

Hi Everyone,

My car is a 1974, 914-4 with a 2.0L (2056cc) engine. With Weber IDF 44's.
My #4 cylinder is running really rich. All the others are fine.

The Question is: What in the carburetor could most likely cause the plug to foul (Running very rich) like in my case? I've tried to adj the air/fuel mixture screw still no change.

This is what I've done so far:

0) Did a compression check on all cylinders. All ok. (95-100psi) 
1) Changed the plugs.
2) Changed the Cap and Rotor.
3) Changed the plug wires.
4) Verified all the jets are the same.
5) Set the Air flow on each carb, sync'd them
6) I cleaned all the jets with the carb in the car, ran and idled much better.
7) Verified Spark to that Cyl, got a hell of a shock out of it.
8) I'm running Elec-Ignition, Flamethrower Coil, 60,000volts.

After doing all this, the #4 plug still fouls after only about 20 to 30 miles. It has to be the carburetor.

I just pulled the carburetor. Thanks for the help.

[dr914@autoatlanta.com]

all good advice, additionally 44s are too large for a 914 engine which will accentuate any problem

[930cabman]

all good advice, additionally 44s are too large for a 914 engine which will accentuate any problem

(IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif)

For fun I tried 44's on my 2056 and no way. I switched to 40's and never looked back. She runs great, pulls nicely, idles great and gets a bit over 30MPG cruising at 75 MPH