PlugAndPlayMotronic/BmwEngines (2007-05-20 17:07:00)

BMW engine running with VEMS PNP (motronic55 connector)

Beware that a PNP install can only save you from making a harness, the installer MUST still verify the harness, and also some small modifications needed to have a reasonable setup (with stuff that can be done better than originally, or which was missing completely: eg. WBO2, analog TPS, DIS, boostcontrol, launchcontrol input, shiftlight output, etc...)

It's an M20B25 engine (from BMW 325 IX E30 ~1988), but it seems BMW was pretty consistent with the pinout, not many variations

TODO: more notes


Idle air controller

Anyone knows

Gergely Lezsak made a few engines, he wrote some docs too, thanx :


Tacho output for RPM gauge

seems to require inductive pullup (eg. 100 Ohm * 220uH). Does anyone BMW dash RPM-gauge working from "logiclevel" 0/5V or 0/12V output ?