Guys... his exup valve is stuck/sticking. The tacho needle movement is a diagnostic.
@ Mt23, service the exup valve (taking care not to sheer the 3x little M6 bolts) and the tacho diag will stop.
See my post below.
@ Mt23, service the exup valve (taking care not to sheer the 3x little M6 bolts) and the tacho diag will stop.
See my post below.