So getting an intermittent misfire P0303 more when engine is cold.
Vin: 4USFE43517LY78582
Chassis: E70
Model: X5*3.0si
Engine: N52B30O1
Miles: 96k
Prod: 12/06
This is my youngest daily driver and has been fine since bought 1yr ago. So cracked the hood to start looking things over. Do not have much on the history on the car for maintenance so initially changed oil and just changed battery as was getting date reset and battery discharge message
So a scan with PROTOOL posted the following errors
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DME/DDE [MSV80] | 29CF: Combustion misfires, cylinder 3
VGSG [VGSG70] | 54C6: Oil wear <<<<<<<----- Transfer case flush New Oil
KLIMA [IHKA70] | E723: No message (condensation sensor, 0x2D1), receiver integrated automatic heating / air conditioning system, transmitter roof function centre
FZD [FZD_70] | A670: No description found <<-- Passenger seat restraint
MOSTGW [CCCG60] | E18D: No description found <<<--Audio related? Blue tooth issue maybe? Also coded out the SOS warning
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So back to the P0303
Opened the hood and after taking off the cover noticed as few things noticed that several of the coil tunnels on the valve cover were cracked and chipped out (I'll post picks) So in line for a new valve cover
2nd that coil #1 had been replace w/DELPHI coil and rest look OEM. Pulled the coils and they looked good no cracks or tears
Pulled plugs and pretty sure they need replacement, gap was 45. I believe that they should be 1.0mm/.40?
Looking at the plugs I see a lean condition but odd that there is carbon also on the base. They all have the standard corona around them.
So moving forward in pursuit of the P0303 Code here is my plan for the next week or so
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1- New Air Filter - Needs One
2- New Plugs
3- Look for any vacuum leaks
4- Look further into the non CCV on the Valve cover
5- Change Transfer case oil
See if the P0303 still happens after new filter/plugs, if so swap the #3 Coil to #1 and see if the Misfire P0101 follows. If so replace all Coils
So going to replace the Plugs any suggestion on which for the X5? NGA or Bosch? The plugs in the X5 only have Bosch R6 / BMW on them
Was thinking NGK Laser Iridium Spark Plug 1208