so yesterday i top'd the oil in the kent (needed about 1.5l or oil) and gave the oil pressure send a few more turns in - because it had a slight leak

this morning i take the car out when it comes up to temp, on idle the pressure drops to nothing. pressure comes down a little bit as the engine revs down and at about .5bar when the car gets to below 1500rpm the needle just drops to the 'off' position.

any one have an idea of what the hell could be the cause of this?

Hi sound as though you have a large amount air in the feed pipe to the gauge. Worth checking that first if only to eliminate it from the list of possible causes.

Cheers Matt

hokay, i think i found the problem,

the pressure sender has 2 terminals on it

it causes problems if the connector on the gauge terminal is touching the warning light terminal

Hi AHH It's not a capillary type . I should have asked before typing

Cheers Matt