2010 BMW 535i xdrive cylinder 3 misfire
#1
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2010 BMW 535i xdrive cylinder 3 misfire
I have been troubleshooting several misfires on my 2010 BWM 535i Xdrive. I had a misfire on 5, 2 and random. To troubleshoot this I have replaced the following:
I just need help in troubleshooting this error
Thanks,
DocDages
- All Plugs
- All Boots
- All Injectors
I just need help in troubleshooting this error
Thanks,
DocDages
#2
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Did you check all connections closely?
I ask because I had a cylinder 5 misfire and upon checking the clamp at the injector, it was 0.5mm unseated. I didn't think that was a big deal, but I decided to re-seat the connection to make it flush. That actually fixed it.
On another occasion, I had a cylinder 3 misfire. That time, all I did was remove the plug and re-install it and all was well.
I ask because I had a cylinder 5 misfire and upon checking the clamp at the injector, it was 0.5mm unseated. I didn't think that was a big deal, but I decided to re-seat the connection to make it flush. That actually fixed it.
On another occasion, I had a cylinder 3 misfire. That time, all I did was remove the plug and re-install it and all was well.
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FYI, I recently replaced all injectors with index 12. One injector I pulled was missing it's decoupling ring. Wanna guess which cylinder had the misfire the most? Yep, that one. Wanna guess the previous mechanic? Yep, me. Works great now.
Otherwise I'd start by swapping the coil with another and see if the misfire moves. New coils can be faulty. It the misfire doesn't move, swap the plug. Then you can pull the injector and examine it closely.
Otherwise I'd start by swapping the coil with another and see if the misfire moves. New coils can be faulty. It the misfire doesn't move, swap the plug. Then you can pull the injector and examine it closely.
#4
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Get a "noid" light off amzaon for about $11 and test the pigtail/connector at injector #3. if it pulsates/flashes whenever you crank it up then you know you have a good connector/pigtail.
I second replacing the coil pack (or swapping with another cylinder) to see if that continues to misfire.
I second replacing the coil pack (or swapping with another cylinder) to see if that continues to misfire.
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