I'm slowly tackling issues with my XJS. When I purchased it the previous owner sent me a bag of parts in the trunk that I assume he intended to replace but never got the time...They include the U shaped fuel rail, complete with injectors, a fuel filter, and another rail I do not recognize...

This particular part, on the car, runs along the fuel rails (there are two of them). The one that needs replaced is on the passenger (US specifications) side of the car. Near the rear of the engine just before it connects to a 1" diameter hose that connects it to a T there is a large rust hole...along with pinholes down it. It has long hollow studs that go down into the intake manifold just next to the injectors...six on each side. But, I can't find any specifics as to what this part is, or if there are certain considerations that must be taken when replacing it. The T it connects to sits just under the manifold crossover pipe...and I have no idea what this system is.

Any guidance would be appreciated,
Matthew EavTech

 

Air injection manifolds.


Cheers
DD

 

Yep, air injection manifolds. Since you are in Indiana (as am I), you don't need to get an emission inspection (unless your planing on moving to Lake or Porter counties), you can safely junk them. They do virtually no good and it will be much cheaper to get rid of them than to replace them.

Have you looked at Kirby Palm's "book"? He discusses a method of blocking the holes, which I used on my '87, using lead nail anchors. Cheap and effective, and cleans up at least a big of the tubing in the engine compartment.

Regards,

John
1987 XJ-S V12, 63,000 miles

 

Thanks for the quick info!

I do have Mr. Palm's book, and look at it almost daily. I'll have to examine that section and make the modification. I had noticed that the engine seemed to run just fine, and plugging the rusted hole seemed to affect nothing...so I'm glad I can just nix those two parts!

Thanks again,
Matthew

 

I took my intakes off and drilled and tapped the bolts to use cap head bolts. have had no problems!