My son and I replaced the Weber set up in his '71 142 with a pair of SUs. The SUs were re-bushed and are in super shape. The car ran well enough before the conversion. Now, it ought to run better, right? It seemed to at first (maybe my imagination), but now hardly runs at all. Before the conversion, we installed an electronic ingnition. When we set the timing at that time to spec, it ran poorly, so it was advanced a lot (something more than 20 degrees). I'm rambling.

The car idles erratically. If I set it at about 800 rpm, it will fluctuate from that to about 1200. There's no power. Fooling around with fuel/air mixture doesn't help and, in desperation, I've messed with the timing. It won't run at spec (10 degrees BTC) and is best at something like 30 degrees. I can't locate an air leak by spraying a liquid at likely places - carb-to-manifold, manifold-to-head. I'm not sure the car runs well enough that I'm getting useful information about the possibility of a leak.

Tomorrow, I'll go back to a basic setting for timing and also for fuel/air mixture, look some more for air leaks and so on, unless someone can give me some better advice.

Jim Hampton