[s-cars] Momentary cut out under full boost

[A Tay]

Hi Gang

My 95.5 avant has begun a bad habit.  Occasionally under full boost the car
will shut off entirely.  It is not a misfire or a stumble.  It is a 100% cut
out as if you turned off the key.  The speedo also goes to zero at the same
time.

Im running the 034 high output coil kit (no pos) which solved my previous
coil related misfire.  Car is running mtm 1+ software with the awesome vmap
but otherwise stock.

Any ideas of where to start looking?

Thanks in advance

Aaron