Motor Vehicle Maintenance & Repair Asked by Ethan Bierlein on December 18, 2020
The question title should be pretty self explanatory. I have a 2002 Nissan Maxima which began idling and accelerating really poorly (seemingly out of nowhere) a few days ago while I was driving home from work. Plugged my OBD scan tool once I got home into its port and got back the code P0306 for a misfire in cylinder six.
I’ve tried to remedy the problem myself, thus far to little success; I have:
I’m going to replace the ignition coil on the sixth cylinder soon since it seems like neither changing the spark plugs nor adding fuel injector cleaner has done anything – still getting poor idle and acceleration, and the gas mileage is tanking; hopefully it does. If not, I’ll be at the end of my DIY ability, and off to the mechanic it’ll go.
As in the title – is it possible for a timing chain problem to cause only one cylinder to misfire? My vague – and admittedly not great – intuition of how the timing chain synchronizes the camshaft and crankshaft tells me that I’d probably be experiencing problems in more than just one cylinder if I do have a timing chain problem.
"Can a bad timing chain result in only a single cylinder misfiring?" No it cannot.
It could be a Bad ignition coil on that cylinder, if there is a coil for each cylinder swap it from another cylinder and see if the miss moves to that cylinder, if it does the coil is bad.
It can also be a bad injector, do the swap thing and see if the misfire moves to that cylinder, if it does it is a bad injector.
Other than that run a compression check on the cylinder that is misfiring.
Correct answer by Moab on December 18, 2020
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