Ok, so this has been going on for 3 months. Parked my daily driven 98 golf with the 2.0 code aba engine one night and the next morning it cranked fine but no start. Noticed the rpm needle wasnt bouncing so I figured it was the crankshaft position sensor. After ordering 4 different sensors ( all claiming that they were %100 sure it was direct fit) I finally got the right sensor .( some sensors have different harness plugs and 2 were just the wrong size altogether... mine has the expensive and uncommon sensor I guess. It started once and I let it run for an hour or so, shut the car off and the next day it wouldnt start again. New symptoms now though. I have no clock or odometer... plus my rpm needle doesnt "bounce" at regular intervals. its very irregular. goes up to about 150 rpms and sits there... then bounces once or twice and sits at 150 rpm again for awhile... all while the starter is cranking away. Ive tried unhooking my battery for days at a time and I checked the ecu for any visible signs of moisture or board burn and nothing looks or smells like the board has gone bad... Whats my next course of action? Any help is greatly appreciated.