I have a 2002 jaguar x type 2.5. Car drives fine but occasionally it acts as if it's fuel staved. Starts idles but no power. Car sets overnight starts and drives fine may not happen again for weeks. Fuel pressure at rail is 50lbs at startup under load between 40-50. I am suspecting an electrical connection. Have visually examined connection under back seat. Nothing note worthy. Any ideas wife is getting very uncomfortable taking car out.

 

start with the easy first.
when was the last time you changed to fuel filter?
for $10 and 10 mins worth changing it out.

 

Sorry neglected to add that.. I changed the filter it ran fine for 5 miles then problem returned. Car sat overnight started drove fine for a week..I checked codes and have a 0191 and a p1236.

 

Also fuel pressure rises to 90 psi after it idles for a minute. Drove with the gauge on and it drops back to 70#

 

I have a new fuel pump but would like to be sure I've checked everything prior to dropping the tank.

 

do you have a copy of the workshop manual?

if not here is the link to my Dropbox where i have it uploaded.

https://www.dropbox.com/s/7000p09kfk...anual.pdf?dl=0

Page 1019 and 1039

 

Thanks Paulc I don't have the manual. Will take a look.