[mwebb]

any VW TDi has an ECM and has some electronic controls to regulate glow plugs - injection pump timing - EGR - Boost at the very least
and
the mark3 and 4 versions have problems in the fuse block that sits on top of the battery

you really need a wiring diagram to continue
a scan tool such as VCDS may point you in the right direction
or not
depending on what circuit stops working

Originally Posted by 320touring

Hi, currently looking at getting a mk3 TDi beater for a daily

got one nearby that is cranking over ok, but blows Fuse 15 (engine electronics, according to the fusebox) as soon as the engine fires.

Has anyone experienced this?if so, what was causing it, and is it an easy fix?

thanks