What is the best path forward to replacing the oil pressure sending unit on a 1994 XJS 4.0? I can see the sender under the intake manifold
just need to know what I need to remove to get at the sender Buried under
the Plumbing ect.

 

Just did this job awhile back on wife's XJ40,to remove the sender I used a 19 mm crow's foot,an extension bar,and ratchet.

Her car was easy!no smog stuff.

On a mate's '94,it took two of us,car jacked up,me under to hold and place the tool,while Larry applied the torque!

Smog stuff!

I wrote up a post in XJ40 with pics,"oil pressure sender",same engine,same issue.

Hope this helps,cheers,JIM.

 

I have a 19mm crow foot wrench will remove some tubing and give it a try.
the new sender has straight threads with a washer does the Factory one have tapered or straight threads ? I can see the sender but not sure of threads

 

Yup,straight thread with washer.

cheers,Jim