• Yeah, everyone's gutted. There's usually complications but really rare to get completely stumped. And weird to manage to get it to crank but not start.

    Anyone got any ideas? Pulled the ignition and the EWS unit off another e39, along with the main EWS unit from under the glovebox and the ECU, with all that plugged in it gets to crank. Weirdly it doesn't show the revs on the rev counter, so we swapped the crank sensor but it made no difference.

    It seems that there's a key reader around the ignition - made up of 2 parts, the key reader round the keyhole and the small ews unit beside it, and then a main EWS under the glovebox. We've robbed all that off a donor car and just plugged it in hanging below the existing one.
    Annoyingly the donor ECU is a bit suspect (after a reverse polarity incident) so we're not sure if it would be an appropriate fix if all the bits were definitely working. We're also not getting fuel pressure any more (which I think we did even with it immobilised), but I think that's an inherited problem from donor.

    Need to establish, are the EWS, key and ECU definitely coded together? Also, whats really annoying is that on facelift e39s with EWS 2, theres a much more straightforward immobiliser bypass (single wire job).

    There's companies that offer EWS bypass but you need to send all the bits and keys off to get coded out.

    Not the most cohesive of posts, tired and still stumped. Gonna go and rag some cars around anyway. Fuck it. We go again.

  • Don’t think so. Pretty sure we got fuel pressure with the original gear even with the immobiliser kicking in. And I think the donor car wasn’t getting fuel pressure either.

    At 10pm in the rain, it was a case of trying anything we could.

  • Spoke to mechanic, reckon we’re gonna try and get someone down to try and flash it out, no point sending it off as we need to check it works.

    Fuck me tho. Had a lot of fun today.

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