I bought my '99 EVC last year, and it has always had the CEL on (occasionally it will flicker, when the weather is very wet and I accelerate on a hill), and I always get several misfire codes (nothing else). Even going back 2 years in the service records it was diagnosed already. I have brought it to 2 different independent, old school VW mechanics, the recommended ones here in town, specialized in Eurovans. Plugs and wires were replaced, coil pack was checked out for malfunction, and Sea Foam injector cleaner was added to to fuel tank. I even purchased 6 new fuel injectors online to have them replaced, but the 2nd mechanic did not see the need for replacing the old ones, it's a big job and he didn't feel there were any symptoms of them being bad. None of these 2 mechanics could find anything wrong with the fuel injection and ignition. They both told me not to worry.?
So I'm out of options, I guess I could spend $2000 replacing injectors and coil, but I'm not sure that will solve the issue, and it probably won't make my van drive any better. So I settled on the CEL being always on.
So I'd recommend adding Seal Foam to the tank to clean the injectors, and your mechanic might have a way to check out the coil pack for malfunction. Otherwise, if the van drives fine without hiccups (a sign of bad injectors) it's probably nothing.
