xjs 3.6 liter 1985.
oil pressure at 5 with ignitin on,engine off.
pressure 7 engine idle.
changed the pressure swith,no help.
what could be the problem ?

 

Welcome to the forum gerben,

I've moved your question from General Tech Help to XJS forum. Members here with the same model will be able to help.

Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some information about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

A bad connection on the oil pressure sender or instrument cluster plug.

If you disconnect the oil pressure sender the gauge will go full scale.

 

Had the engine been running recently? A good one won't leak down oil pressure right away.

 

engine is running regulary.
does not leak down oil presure.
the gauge reads 5 before engine runs. thenn climbes to 7 on idle..

 

Does the oil pressure warning light come on at any time?

 

This is an electrical gremlin. Nothing to do with the actual engine.

 

no light coming on.
oil pressure is fine.. it is the electrics that causes problems.

 

checking the instrument cluster is a p@&#+ in the b@#$.
the engineer who invented the system with the printed circuit under a layer of plastic,realy did NOT do us a favor.