Multiple instrument fluctuations, any ideas?

[Englishman]

Took the Tuscan out tonight and a very odd problem seems to have developed.

On the detailed display the oil pressure, water temperature and fuel figures are varying massively - 30-50psi, 70-115C, 30-45L at a steady speed and rpm with no obvious reason. The other displays of speed, rpm etc. all seem normal so doubt it is a dash pod earthing issue. Anyone heard of this before?

[Englishman]

Discovered today that this only happens with the blower on!

Others reported this a while ago too, but no resolution noted:

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[Englishman]

I'm pleased to say I just fixed my issue.

Don't know how long it'd been like this, but the earth connector bolt near the top of the righthand side in the passenger footwell was about 1/2" out!! Yes really. I'm surprised anything worked!