At 12:02 AM 6/25/00 -0700, you wrote:
Phillip has begun to start with difficulty. I have to noodle the
throttle until things are warmed up. This has been a gradual change.
Once running, the motor will rev up ok, but runs marginally. When
I pull plug wires #3 and 4 there is no discernible change. I checked
the plug wires for spark and pulled the plugs, all is normal. The
Solex carbs appear to still be in sinc. How do I tell if enough fuel
is getting to the left carb? I'm thinking the main jet is partially
clogged (accel. jet still working OK, so fuel is getting in there).
First, check to see that the carburator is securely fastened to the manifold, and that the manifold is secure to the head. A vacuum leak here can easily cause this type of problem.
Next, do you have an electromagnetic cutoff valve? If so, check to see if it is opening and closing properly by switching the power on and off. Also, pull the valve (and jet, or just the jet if you don't have the cutoff valve), and check to see if it has any obstructions in the jet hole.
As a last resort, pull the carburator, disassemble and clean it thoroughly. Just take your time and don't force anything that doesn't want to turn.
Also, don't count out the fact that you may have a burned valve on that side of the engine, or a loose head. Do a compression test. While you're at it, switch the spark plug connectors from left to right, or test them with an ohmmeter. Check the manual to see how much resistance there should be; the resistors inside can fail, causing progressive missing.
Nathan ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org