I'd say it is the TRS chip that is giving you the miss, I must be lucky as I've never had this miss, when all is good (ie)no oil in the harrness and so on.
If I was near you I would lend you my spare MSB ECU (has a B Davis chip) to see if it was the software in your ECU that is giving this miss.
At the moment I have a flashed NNN ECU with a TD5Alive upgrade in my D2, seems to be working really really well power wise at the moment and no miss, although mine is a manual D2.
We put my MSB ECU in Phils car and straight way you could tell, no miss at all at idle.
Also I have since been informed that there are 2 MSB ECUs, late 98(Aug/Sep to early (June/July)2000 and late Aug/Sep2000 to early June/July)2002, after this Aug/Sep comes the D2a update with the flashable NNN ECU

COMPLICATED HEY
These dates are all build dates, not release dates

(eg) a 2001 model D2 was built between Aug 2000 to July 2001.
Baz.
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