Hi Everyone, The 'Service Engine Soon' light stays on, and my mechanic (a very sharp guy) thinks the P0300 code - and the many engine misfires on cylinder 6 - mean it's time for a Timing Chain. (This 1996 Century has 121,000 miles).
He's tested the coil, wires, and spark plugs: all seem okay. He's performed a 'cylinder balance test' (?), and it passed. Compression tests on cylinders 2, 4,
6: good pressure. He doesn't believe #6 fuel injector needs replacing.He's noticed the timing fluctuates at idle, but stabilizes at higher RPM. The engine misfire also seems to go away at higher RPM.
Any other opinions? Thanks!