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mnetwork mnetwork is offline
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Default Slight misfire under boost and rich plugs in cyl 2,4,6 - 10-15-2016, 07:53 AM

I have been having a slight misfire under boost (not enough to trigger a CEL) and a slight stumble at very low throttle while cruising for the past few weeks. Finally got to look at it and pulled he plugs to see what they look like...

Cyl 1,3,5 look fine
Cyl 2,4,6 are black and smell like fuel

What could cause a pattern like this? I'm find with replacing injectors, but I don't see how injectors could cause a pattern like this.

Picture of plugs attached and this order... 6-5-4-3-2-1.
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Impac Impac is offline
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Default 10-15-2016, 08:23 AM

If plugs are wet and smell like fuel its the Injectors


JB4 G5, DCI, Er CP with HKS Bov, VRSF DP's, BB Race flash
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mnetwork mnetwork is offline
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Default 10-15-2016, 08:45 AM

Quote:
Originally Posted by Impac
If plugs are wet and smell like fuel its the Injectors
Yes, of course... but what could cause a pattern like this?
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mnetwork mnetwork is offline
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Default 11-08-2016, 08:08 PM

FYI, this was resolved with refurbished eBay injectors for the affected cylinders. All info in this thread: http://www.e90post.com/forums/showthread.php?p=20826061
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Default 11-13-2016, 03:34 PM

I have the same issue with #1 and #6. Got six new revision #12 injectors on order now. I looked at the refurbished injectors but based on the pictures given you would have to by the seal injection tool which compresses the O-rings before you put them in. I would get that clarified before I ordered refurbs.
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mnetwork mnetwork is offline
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Default 11-14-2016, 04:30 AM

Quote:
Originally Posted by Boland01
I have the same issue with #1 and #6. Got six new revision #12 injectors on order now. I looked at the refurbished injectors but based on the pictures given you would have to by the seal injection tool which compresses the O-rings before you put them in. I would get that clarified before I ordered refurbs.
I did not need the compression tool. Just installed them with the tiniest amount of lithium grease on the seal. They went in fine with a perfect seal. I've seen others do it this way with no issues was well.
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Default 11-14-2016, 07:28 AM

Good to know. Better than buying a $200 BMW tool.
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