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I have a 2011 328i, driven daily by my wife.
It began throwing codes and an obvious misfire. Code was P0303 misfire on Cylinder 3.
So I swapped the #1 and #3 coils. Now I have 6 codes. P0303, P0301, (2 each) and P0305 and P0300
P0301 is cylinder 1 misfire. 0303 is cylinder 5 and 0300 is multiple misfires.
This looks to be a more significant problem than coils or plugs. Ideas? Help???
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[quote=”jmorgan456″ post=169846]I have a 2011 328i, driven daily by my wife.
It began throwing codes and an obvious misfire. Code was P0303 misfire on Cylinder 3.
So I swapped the #1 and #3 coils. Now I have 6 codes. P0303, P0301, (2 each) and P0305 and P0300
P0301 is cylinder 1 misfire. 0303 is cylinder 5 and 0300 is multiple misfires.
This looks to be a more significant problem than coils or plugs. Ideas? Help???[/quote]
how do the spark plugs look???
I need the thin wall socket to get at the plugs. But that would be next.
Update: I pulled all three supposedly bad cylinder packs. Hit them each with electrical parts cleaner and reassembled.
The only code thrown was p0301. So I am thinking that the rough running triggered the other codes.
Am I just deluding myself?you can get a lot of info from the spark plugs… you can always buy a spark plug socket see if it fits and posiblly grind it doen if it dontnt fit.. but I havnt ever see the correct size sprk socket wall being to thick…I think advance auto sells them for a $1
I agree with rob781, do what you have to do to pull the plugs out.
I had a friends 2001 v6 accord throw misfire codes constantly when he first bought it. We put new plugs in it and its been running trouble free for almost 2 years.FIXED —
After the last go ’round with the scan tool, I was convinced that the bad running was triggering the misfire readings in other cylinders.
Since the #3 was now good, I switched out the coil which I originally thought was bad. Voila. Runs like a champ – no codes.
So here is a case where the diagnosis made matters worse before they got better.
BTW — I went with the NAPA house brand Echlin – mostly because it was available and the car needs to run. The repair is pretty easy once you get access. Access is a bear – you need to remove a bunch of shielding holding the cabin air filter etc.
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