I just swapped the ecu so I could set lambda. With koeo I still get a 90% fault code, but with the car running I now get a fluctuating duty cycle around 22%; before the swap I got the same fixed fault code. Regardless of how far or in which direction I turned the screw I couldn't get this reading to change much. Now, after all this trying, the car cranks but will not start. I got it to run once by light pushing down on the air flow plate with my finger, but when the car was shut down it wouldn't start again. Did I mess up, or is this just coincidence? BTW, OVP, ignition coil & fuel pump relay have been swapped & seem ok, & the O2 sensor is new. Also, the neutral safety switch was replaced by an indie about one year ago when the car wouldn't start in P or N, and I just tried it in N & it doesn't even crank in N (maybe it never did). Could the NSS be involved? I am planning on checking it this weekend based on posts & the Haynes manual I just got. Thanks- I need to get this car running so my daughter has something to drive!

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87 300e (white/black; amg body kit)
88 300ce (red/cream; amg body kit)
93 300ce cabrio (white/blue/blue top)
93 300ce cabrio (black/grey/black top)
98 ml 320 (totaled @ 137,000 miles)
99 clk320 (black/grey/black top)