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

Question

Hi Everyone,The 'Service Engine Soon' light stays on, and my mechanic (a verysharp guy) thinks the P0300 code - and the many engine misfires oncylinder 6 -mean it's time for a Timing Chain.  (This 1996 Centuryhas 121,000 miles).He'stested 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'snoticed the timing fluctuates at idle, but stabilizes at higherRPM.  The enginemisfire also seems to go away at higher RPM.Any other opinions?  Thanks!

jgalianojr · Accepted Answer

Catality converter comes to mind because they are know for this with out giving you any heads ups. tell him to do a back pressure test he knows what i am talking about also the camshaft sensor in this things goes expesially with that kind of milage. good luck

Al Bundy · Answer

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 andknow whether it's worn or not. Move on from there.

rbolms · Answer

Galiano and Bundy:Thank you for your advice.Cause was timing chain, nowfixed.Case closed.Regards,Rick

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

Join the Discussion

Didn't find your answer?