Buick Century, diagnosis code P0300: needs a timing chain?

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!

Reply to
rbolms
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Reply to
jgalianojr

If your doctor said it was time for a new heart because you were 55, would you say, "Go ahead"? He could check the slack in the chain and know whether it's worn or not. Move on from there.

Reply to
Al Bundy

Galiano and Bundy: Thank you for your advice.

Cause was timing chain, now fixed. Case closed.

Regards, Rick

Reply to
rbolms

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