Hello!
My father and I have been working on his jaguar throughout the beginning of the day today. When he was working on it, i went out there to see if i can give a hand. He told me to keep an eye on this part(Fuel injection pressure regulator), and as he started turning on the car. Fuel started leaking out badly. You see, we have been trying to gather as much information on this as much as possible. We came up pretty much empty-handed and are now doing this on a trial-and-error basis. So before installing the new part, it wasn't leaking fuel. Now it is, with the new part. We're thinking it's not the new part, because we tried installing the old back in to verify if it still occurs.And it did. So we're assuming we must've messed up this installation process somewhere. Maybe he bent the area where the clip latches onto underneath it all. Maybe we didn't lubricate the O-rings enough. We don't know. Does the bracket affect the interior alignment of the part? Is there any way we can edit the housing to allow leverage to tighten it further? Is there a certain type of sealant we can use that does not dissolve the o-rings? Or is there any other ideas about how to stop the leak?

 

Some vehicle details would help.

 

Sorry, not really a mechanic myself, but yeah, it's an 1999 XJ8 sedan 4.2L. Apparently, the leak is the only thing stopping the car from starting at all, from what my dad says anyway.

 

Make sure the bracket isn't distorted as the installation procedure is very straightforward.

What other work has been done to the engine that included removing the fuel rail?

 

There are several 'O'rings involved in the fuel rail.
Look at all the seals for distortions or damage.
I had a leaking seal on that part when I swapped intake manifolds complete and installed the original part/seals and the leak stopped.

 

He said he didn't have nothing else done, that he didn't remove the fuel rail.

 

He's saying he didn't mess with the fuel rail too much though, also I'll try to talk him into checking the o-rings per seal.

 

Problem solved. So it turns out on the fuel rail side, where the fuel pressure regulator is placed into the socket, it is actually softer than the bracket. Which means, it tweaks out and bends easily. Therefore, making an improper seal due to misalignment thus causing a leak. Fix: straighten-out the socket from the fuel rail, what the fuel pressure regulator connects to. Make sure the o-rings are lubricated, we used motor-oil. And then make sure all parts are flush and flattened together in the right order. Carefully clip it underneath the bottom and carefully tighten the bolt at the top.