Got a code for both banks lean (tho engine seems to run fine). First thought was a vacuum leak somewhere. Suspected the brake booster line because I did just RTV it before. But no. Performed a smoke test and its blowing pretty seriously around the driver side cam position sensor, which also appears to be conspicuously oily compared to the dry one on the passenger side (U.S.). May be other leaks but I'll fix the obvious one first, then recheck. I'm going to have to shift the fuel rail to remove it so I wanted to order the parts to have on hand before I dismantled it. I assume there's just an o-ring around the CPS that's dried up and possibly split but I can't locate a part number for it by itself. Hate to buy the whole sensor just for an o-ring. Anybody know a part number or the specs for that o-ring?

Also having a hard time deciphering the parts catalog for injector seals. Which is which? JLM20291 appears to be the part number that refers to the injector to fuel rail o-rings (sold as a set of 8) while ncc3016aa appears to be the injector to manifold seals sold individually. Can anyone confirm which is which before I order the wrong quantities?

 

Phil, it seems that Jaguar's parts site has an issue I've just ran into the same error when you click on their injection diagram it takes you to the cam cover seal kit!
Injector seal kit...
https://www.britishparts.co.uk/class...ring-kit-p6261

The cam sensor seal, I've some in the spares' box I'll get back to you on measurements later today.

 

If you haven’t done it already, clean out your maf sensor as a contributing factor for the lean codes.

I hope this isn’t the scenario for you but, it has been my experience that I remove the valve cover and gently pry up from the underside of the cam sensor to remove it. I have tried removing the cam sensor from the top and given the age and heat cycles, the metal cup from the bottom of the cam sensor that slides in the head separates from the sensor and now you have to get another sensor. There’s copper windings that are exposed. Ask me how I know. 😁 Just a word of caution for you.

 

Oooh. Thanks for the tip.

 

Managed to locate one, in the middle of a house move!
Looks like an O ring kit will have a match.

 

Thanks for checking. That's good because the local Jaguar dealer has them for $18 each, EACH! Its not a kit of 8 as the parts catalog suggests, but EACH! And the lower seals are not just simple o-rings, but still shouldn't be $24 each. Seriously? $336 for a complete set of injector seals? I'll do the real Jaguar parts sometimes if they're not ridiculous, but that's ridiculous.