So here's my situation. I have a 2005 S40 2.4i. Just rebuilt the motor. After the rebuild, it started and ran but cylinders 1 and 5 were not firing (P0300 code). In the process of figuring out why, I messed with the ECU a little bit to see if it was loose or something, and then suddenly none of the ...

I have a 2005 S40 2.4i. Bought it broken down, worked with a mechanic to rebuild the motor. What caused it to break down was some sort of timing malfuction, causing the timing belt to slip and damage a couple of the valves. So we tore apart the engine, replaced the damaged valves, rebuilt the cylind...