Today while sitting at a light the engine died and wouldn't restart. A passer-by helped me push it out of the road. After a while it would start and die. Then start and the rpm would surge a bit so I managed to get it back home. Trouble codes P0335, P0339, and then P0300. So I went to change the crank sensor and it won't budge. The plastic casing is crumbling apart as I try to remove it. Not sure what to do now. I may try to rig up some air pressure into the valve cover so hopefully the debris will blow out as I drill out the inside.
Anyone have any suggestions?