PFC and cooling questions?

[d6277n]

Taking advantage of the nice weather before winter sets in and noticed two slightly disconcerting things:

1.) PFC screen went blank when I was warming up. After I moved the cable a bit it came on again with the start-up screen showing. Figured it was a loose connection, so got to the ECU and had a look at the PS2 type plug which seems ok - I\'m assuming it was a little loose and it looks to be behaving itself now. I\'m guessing that it was just the commander as the engine would stop if there was a power failure to the PFC itself? Anyone else seen this before?

2.) Just noticed I\'ve got a thin layer of oily black gunge floating in my expansion tank (can see it on the dip stick). Should I be worried? No signs of mayonnaise under the coolant filler cap, no loss of coolant and oil use seems roughly normal (not driven the car long enough to have a proper feel for it yet).

Anyone got any comments? :xconfused

Chris.

[Adie Moore]

yeah, had the apexi go blank. pooped myself as not had it long. but like you say it was the commander camle come loose. Phew.
dont know about black gunge, but a rad flush would make you feel better, and then filled up with filtered water, that way you know your doing the best for the old girl.