So my Mini has been consistently stumbling under load for the last week or so. I've diluted the gas with premium and run a premium tank with no change. Finally got a code this morning: cylinder 1 misfire.

She's at 114k, so plugs and coils wouldn't be a bad idea regardless I think, but after reading a bit on here, i"m worried about the carbon buildup possibly being the culprit. This happened shortly after the local tech overfilled with oil (and it took me almost 2000 miles to notice ), which seems to reinforce this possibility in my mind. Anyone have any ideas on this?

I've done brakes and some suspension work on the Mini, but we were under the extended warranty, so this will be my first work on the engine. Seems like there's no real service manual available, so I'm on my own. Anyone know the cylinder order?

Thanks!

 

I believe its left to right when facing the vehicle and looking into the engine bay. 1 being on the far left and 4 on the right closer to intake tube. If someone validates that to be certain that would be nice. In my experience coil packs or spark plugs are usually the culprit. You could also remove the spark to check and see if it is really fouled or maybe there is oil residue.

 

+1

 

Thanks. 4 plugs and a coil on order, so hopefully that fixes it.

 

when my GF had a misfire on cyl 3, there was excessive vibration in the motor. it wasn't firing that cylinder at all, gave limp mode but would still run. I never used a code reader on it, I could hear the fact it was only running on 3. the coils are known to go bad, and they are an easy replacement

 

So anyone know what spark plugs actually fit? Ordered some densos from Amazon, didn't fit. Ordered Champions from Rock Auto, didn't fit. Neither had the proper 14mm shank to fit. Any recommendations?