Hello
I'm suffering also from the dreaded ETM Problems.
I've posted on the V70 '96-'99 forum as mines a 1999 model with Denso Electrics and the dreaded Magneto Marelli ETM with no luck (I guess not many have these problems on there)
Without repeating myself posts can be read here :-
Post 1 - 1999 V70 ETM Wiring etc
Post2 - Advice Req'd - ECM & Forward Loom
Basically I suspect the connections in the loom between the ETM and the ECU as these were potentially damaged in flood water a few months ago. (Idle problems intermittent - go away after loom is flexed?? / car cooled down & restarted)
I need advice on removal and testing of loom / access to connections.
ETM has been repaired an codes read, to no avail