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I came off a highway drive just before Christmas, stopped at a light accelerated and received an engine malfunction light. Started missing was able to limp the 3 miles to my house. Checked the oil, proper level, check the coolant, proper level. let it set over night started in the AM but still missing so decided to take my truck and work on it after the holidays. Tried to start it after the 2nd and would not start turns over fine but won't start now.
I pulled the codes P0300 P0301 P0303 are the only codes.
I pulled the Coil Packs check getting spark, plugs look good about 5K miles on them. I reset the codes just to see if the would show again. Since it won't start no codes now.
Battery is full and on a trickle charger to keep it charged.
Timing chain was replaced at 90K (current miles 108K)
Other threads I have read CamShaft Positioning sensor sounds promising but no code for it in my ECU.
Any help on the direction to get her running again would be appreciated.
I haven't pulled the injectors but when I pulled the plugs they appear wet and I can smell fuel fumes coming from the exhausts when trying to start it.
The High Speed Fuel Pump was replaced around 50K miles. The symptoms were quite different when it failed, Started OK, but stalled at low speed, as long as the RPMs were up it would run.
What does the battery read at when you test it? Do you always have a tender on it when you are not driving it? Since you already did the HPFP - Have you had a carbon clean up on your R56 yet? Just about every 50,000 miles the intake valves need to be cleaned to maintain optimum engine performance. Once the build-up reaches the maximum tolerable level, the engine will begin to run rough and misfire. You may have a rough idle, poor acceleration, stalling or single to multiple cylinder misfires. If you have any of these symptoms, check for valve residue build-up. Here is what to look for, from our carbon clean up DIY:
Battery tests good. This was my daily driver until the Misfire/won't start issue. Battery tender only on it since I parked it on the 12/23. I have seen weird things with battery voltage on BMW's and Jags in the past so always the first place I check.
Wanted to give an update on my Mini won't start issue.
Compression check showed low compression on 2/3 cyls, pulled the valve cover timing chain everything was good thankfully. My brother suggested to try the old backyard teaspoon of oil down the cyls to see if it pressure would come up. Sure enough it did reassembled and after a few cranks sputtered and came back to life. Cleared the misfire codes running fine ever since, just checked the compression again all good still after 500 miles.
Strange must have washed out a ring when it misfired my only guess.
Decided to give it to my brother since it was his suggestion that got her going again and I had already picked up another car. Plus he will let me drive when were together.
