I own a '90 Vanagon GL, with 110,000+ miles. = I've recently run into some trouble. Let me break down the situation for you. In = December I replaced the plugs, wires, dist. cap, & rotor. Afterwards I experienced a strange "pulse" power loss (almost like a = miss) and the van stalled a couple of times. Once while driving, and once = while stopped. The van sat for the weekend and then on my why home, it = gradually lost power and died on the side of the road. I had it towed to a = local garage and they determined it was a faulty distributor, so they = replaced it, and the van STILL wouldn't run right. It would blow black smoke and = run very rough, and somedays not even start. They worked with it for a few = weeks and couldn't find the problem. (they were not a "vw" shop, but = they were close to my house, and an honest shop) they gave me the option = of towing the car to where ever I wanted, and not charging me for any = of the work they had done (feeling bad about not being able to repair the = van). So, I had it towed to a local VW dealer, where they determined the "new" distributor was also bad, so it was replaced. But, = my poor van would STILL not run right. It was still lacking power and = stalling, so they checked it over and suggested maybe it was the O2 sensor, or = Air Flow Sensor. I ran low on money, so I was unable to have them replace the = pricey O2 sensor and continue their diagnosis. I brought my van home, and = took out the Air Flow Sensor and cleaned it and checked it over, it appears = to be working. I also ordered a new O2 sensor from The Bus Depot, and am = awaiting it's arrival. Does anyone have any more suggestions on what the = problem may be? PLEASE HELP!!!