You did a very good job describing the original problem . . . so if it wouldn't stay running then, it won't now. An ETA does nothing to make a M119 run, just is a big throttle (fly-by-wire).

First, did you clean the MAF when it was out?? Some CRC MAF cleaner (or certain brands of brake cleaner) to make sure it's ok. The hot-wire MAF are somewhat durable and tend to work but can get contaminated as described in Menu#4a. Do what I did and see what happens.

But, as I said to open, your diagnosis was accurate, so after cleaning the MAF, it still needs an EA . . . most likely. Maybe you can swap with a known good EA to be sure??

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Regards . . . . JimF
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'94 S500 Cpe

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