Been chasing a misfire issue for the past few days. 2006 MCS pretty much stock with about 105k on her. Started it up and drove half a mile then started running terrible. got 4 codes. Note that I have been driving with the 2096 code prior to this issue (but maybe it's the root cause?)

I started by swapping the spark plugs wires. No change. next I swapped the injectors around. moved #4 to #3 hoping the code would follow the injector. Still got the #4 misfire code. I also put all new o ring's on the injectors since I lost one.

Lastly I did a compression test. Rented one from the auto parts store. Each cylinder shows 130psi. Low, but consistent, based on my research. I also topped off the oil since it was a little low. Ran it a bit but still runs awful. Idle is really bad so I can't even drive it.

Looking for some advice on what to check next... Coil pack? Leak down? Swap plugs?

des.

 

Since the code remained on cylinder 4 after you moved the injector and spark plug wires, your next logical step would be to replace the coil or coil pack whichever is germane to your Mini.

 

Thanks, I will try that tonight.

 

Possible broken valve spring....did you clear the codes after swapping parts around?

Did you actually swap plugs around, or just the wires? Maybe cracked plug?

Since #3 & #4 are next to each other in the firing order, 1-3-4-2, I would swap parts with #1 cylinder to get a possible better reading from the scanner

(do not get a MSD coil pac, stay with OE....the original coil pack has been proven the best)

Bryan

 

I did clear the code and it popped right back up. I did not move plugs. just wires. inspected the pugs when I pulled them for compression test.

I thought the MSD coil pack would be a good upgrade based on my research, it seems not though?

 

I would swap 1 & 4 plugs, see what happens. You can check spark out of the coil with a spark tester.

The mad coil is junk, stay with OE if the coil pack proves bad

 

Had the same exact issue with my 06. Was so relieved when I fixed it.

 

I had the same issue last summer, I ended up changed the plugs, coil pack and wires and the problem was gone.

Best of luck.

 

Thanks all for the help. It was indeed a bad coil. Swapped that, spark plugs, wires, and put on a 15% for good measure. Runs great but still can't clear the codes....I read on another thread you gotta use a scanner such as a NT510. Can anyone attest to that? I just have a cheapo bluetooth adapter now, and it won't clear the codes.

 

ive cleared most codes on an R53 except hidden ones or the airbag lights with just a scangauge 2

 

my Bluetooth does it fine.
try clearing them with igniton off