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Old 01-02-2019, 08:46 PM
Join Date: Nov 2016
Location: Australia
Posts: 64
AussieXer is on a distinguished road
Discoloured injector

Still trying to track down the cause of an annoying misfire. Falters under load at low (1500) revs. Generates 29CC (misfire on cylinder 1) and 29CD (misfire on other cylinders). Following up on some suggestions from StephenVA. Have removed injectors from cylinders 1 and 2 in preparation for swapping. Noticed that the 3cm metal cylinder between the o ring and the tip of cylinder 1 injector is quite discoloured (black and oily looking) compared to cylinder 2 (quite shiny). Any suggestions as to what could cause this? Not sure if I am looking at a cause or an effect.
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Old 01-03-2019, 02:41 AM
wpoll's Avatar
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 2,412
wpoll will become famous soon enough
Failed injector seal? I'm not familiar with the injectors in you car but it sounds like combustion products fouling the injector...
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
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Old 01-13-2019, 11:41 PM
ard ard is offline
Join Date: Mar 2006
Location: Sierra Foothills, California
Posts: 5,339
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what are your AFRs and fuel trim numbers?
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Old 01-24-2019, 12:56 AM
Join Date: Nov 2016
Location: Australia
Posts: 64
AussieXer is on a distinguished road
Think I may have solved the problem. Flushed out the vanos solenoids with carby cleaner and seems to have fixed it. No more errors generated no matter how hard I try.
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