Just to add a suggestion...
Any history of the ignition switch (electric side) ever being replaced? Could be pitted contacts in the start position.
__________________
Liam...
'96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav.
|