mysterious electrical problem

[vwtrouble]

hi can anyone help me? I am the proud owner of a T25 1988, but recently it broke down! it has been in the VW garage a week or so now and they still cannot pinpoint the problem. I was told there was spark and fuel, now there is no fuel going to the fuel injectors. all components seem to be working fine so they think it may be faulty electrics, but there are so many! has anyone come across this before or know where to by new electrics..its not the e.c.u....the bill keeps rising and there seems no end in sight to the problem:(

[kevtherev]

from the wiki (top of the page)

Check that you have 12v on pin 30 in the distribution box left side front of engine as this supplies the fuel and ecu relays, then check the outputs from both the relays, if the ecu doesn't get it's ignition switched 12v it won't start.

Check spark at plugs

Check connections on temp2 sender and afm

Check connector to ECU (maybe the wind and damp got to it)

Check that air inlet not blocked somewhere (eg birds nest material in cyclone)

Check trigger signals to injectors

Check fuel pump running

Check connections hall sender and isv and idle control unit - try taking the idle out of the system too - a faulty control unit may affect the start up, the ecu is told it's starting by the ignition switch and throttle switch and adjusts accordingly