Thread: S8 D3 truly random misfire
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Old 21st July 2019, 05:06 PM
Prefferle Prefferle is offline
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Join Date: Apr 2017
Location: Scarborough, North Yorkshire, England
Posts: 104
Default The sage continues lean codes and V10 rough idle
Quote:
Originally Posted by kele View Post
James at injectortune runs a D2 S8. Or at least did in the past. He did 10 injectors on mine. All good...
Hi all, so now all injectors serviced by Injectortune, and refitted with new installation kits, new Lambda sensors bank 2 and bank 4, new Oil separator fitted, and still having this intermittent rough idle. After spirited driving the CEL is on again with the following codes by VCDS:
Bank 1. System too lean at idle. P2187 - 004
Mixture regulation Bank 3 range 1. P1081 - 004 - lean limit exceeded - MIL on.
Mixture regulation Bank 4, range 1. P1085 - 004 - lean limit exceeded.

Looking at the above can anyone suggest additional checks... it looks to be a vacuum leak... possibly?

I can not remove the oil filler cap with the engine idling due to tremendous vacuum - is this normal? On other web threads this points at a faulty oil separator - please let me know what is normal.


I’m at my wits end on this car - so much work and No cigar...

Thanks guys,
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Daily driver: BMW e65 730d
Batmobile: 2006 S8, D3, 4E 5.2L V10 BSM with (loud) Miltek SS exhaust, Carbon Fibre trim, Alcantara headlining, soft close and keyless entry.
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