02 Civic EX
74000 miles
Absolutely bone stock


Changed the water pump and timing belt only. Now I get a P0300 (random misfire) P0303 (cylinder 3 misfire) and P0304 (cylinder 4 misfire). I've checked everything that I could. All wires are showing the right ohms and voltage except the obvious. Replaced the Cam and Crank sensors, still no worky. Any input is greatly appreciated. The only thing out of the ordinary is that the timing belt tensioner bolt hole was stripped but I retapped it and put a new bolt in it. Thanks to all who reply.