[bathboi]

Hello all, I've been dealing with Zero quantity faults on cyl 3 for about a month now. I have been deleted and tuned with JR 2.8 for about 4 months now. After I deleted my swirl flaps, changed my glow plugs and controller, and cleaned the intake manifold (professionally cleaned by the machine shop who did them under BMW warranty) I started to get fault code "004AF6 DDE: Zero-quantity adaptation, injector, cylinder 3" I performed the corresponding test plan in ISTA and found that there was a very large negative compensation, -120 or greater on cyl3. Despite this the engine ran fine so I was confident its not an actual injector issue and to confirm this I did a carbon cleaning and when I did that I swapped all my injectors (of course renewed all one time use seals) I then recoded them to their new cylinders and performed ALL the necessary adaption resets and man the car runs amazing. My fault came back though and the large negative compensation on cyl 3 persists, and at this point I'm convinced I'm looking at the issue described in SI B13 04 14 which is confusing because my integration level is E89X-18-07-520 which should be higher than described in that bulletin. If it is actually a software error in the DDE, has anyone with JR tuning had experience with this? I'm considering reaching out to them and seeing if they can do the software fixes to my DDE.

[335dlci]

Compression test.

[bathboi]

Originally Posted by 335dlci

Compression test.

I considered it, and probably will do one for shits and giggles when I pull the intake again to check the swirl flap blanking caps for leaks. But I've never seen any engine run perfectly on low compression. Do you really think that could be an issue? Also I assume it would atleast throw another code or two, but my experience with diesel is much lower than with gas.

[335dlci]

Compression test it.. then been replacing a lot of engines lately... did you say diesel is much lower than gas??