Hi folks. My daughter drives a 99, 2.0 (AEG), 5-speed, Newbeetle. Generally this car has run well (>200k) and other than a coil pack and a crank position sensor replacement, has been solid for several years but yesterday it began to run badly (bogged down, idled badly, barely running). This happened about a year and a half ago and I pulled the plugs to find the #4 really caked up. Replaced all four and have had no similar problem until now. Yesterday, it started to run badly in the same way. Generic code reader said P0300, P0301, P0302, and P0304 (misfires). Pulled the plugs to find the same #4 caked up again and proceeded to replace all four... I got this, right? This time... not the fix. Really not much change at all. Cleared the codes and all but the P0302 returned. Any ideas? Thanks in advance for any help.