I need the wisdom of the List. I have a Eurospec kit
in my '85 GL. On hot days the engine will not start
back up after sitting for a few minutes. It needs to
cool down almost completely before it will start.
It tries to start but sounds like it is running
on 1 or 2 cyls. I use to have a hot start problem
before where the engine would just spin and I had
no ignition at all. It turned out to be a bad power supply
relay,( I thought) the one that supplies 12v to the ecu. The relay
would heat up and not work. I moved the box that housed
the relay to a cooler spot and that seemed to work for awhile.
When the engine wouldn't start or ran on 1 or 2 cyls. I would
swap out the warm relay for a cool relay and the engine would
run fine. Since the relay was still getting too warm it seemed,
I moved the relay box and ecu under the rear seat. I figured
this had to fix the problem since the relay was no longer
in a hot spot. Well, it didn't fix the problem. So now
I think the problem is in the wire that runs from the terminal
in the back of the van(in the black box that has the picture
of vacuum lines on the cover) to the dash/fuse block and back to the
relay.
This wire is about 18ga. and about 20 feet long. I think
this wire has too much voltage drop for the new ecu which
was designed for a jetta engine (shorter wires, since everything
is up front). Does anyone know why this wire needs to run to the fuse
block? Bentley doesn't show a fuse in this wire.

Any thoughts on this or what else might be causing the problem?
I never had a problem like this with the old 1.9l.

Grant Holst
Sunnyvale, CA.