Hi there!
I was wondering, I have a 97 jag xj6L
With about 77,000 miles on it, im the second owner of it. (Love my jag)
As far as i know the fuel pump has never been changed.
Now with that said, i have heard some people say you should not change
The fuel pump until it completely goes out. i have also heard that its best to replace it every 30,000 miles and some have said every year max every 2 years.

I wanna know your opinion or suggestion on this topic.
Thanks.

 

If you want jobs to do, your Jag should keep you busy! Even when all is going well, you'll find plenty of little "niggles" and minor bits and pieces to attend to.

So, if it ain't broke, don't fix it! I drive a 96 4.0litre Sovereign with 118,000 miles on the clock and in over 2 years of ownership I've had nothing catrostrophic happen. Just the usual high idle, dodgy ABS sensors/module, sagging headliner, rear shocks and telescopic steering motor drive cable. It has always started on the button and sometimes I think I've dodged a bullet when I read about non start issues, with CPS/CKPS, fuel pumps, ECU's etc. failing.

I'm sure my time will come, but apart from regular maintenance, washing and polishing and cosmetic improvements, I leave well enough alone.

I have a 3.2 donor car also, so if something does go pear shaped, there's a good chance that I can put my hand on a replacement pretty quickly, if only to keep me going while I get a new part.

Happy motoring!

 

As long as I don't make any long trips I am not going to change the pumps in my cars. But early next year I'll be driving one of them to Florida for a visit, and whichever one is going will have a new pump.

 

I would guess the average for X300/X308/X100 fuel pump replacement is about 100,000 miles.

Keeping the fuel filter changed will likely help extend the life. A clogged filter makes the pump work harder.

Just an observation.

bob gauff

 

Ditto on what Bob said. Change the fuel filter regularly. I just did mine along with a (misdiagnosed) fuel pump. My filter was long overdue - I just overlooked it when I bought the car 2 years ago and changed all the belts filters and fluids as a new / used car thing I do. It sits in the rain, and in Pennsylvania the salt, and causes a good bit of corrosion around the connectors. If it gets changed on a more frequent basis it will save you a lot of PB Blaster in my case or broken fuel lines worst case.
Replacing the filter is not a bad repair if you are a butcher like me and make an access panel in the back deck. There is a post about the proceedure somewhere on this site.

 

[QUOTE=
Replacing the filter is not a bad repair if you are a butcher like me and make an access panel in the back deck. There is a post about the proceedure somewhere on this site.[/QUOTE]

Did you mean changing the pump? If so, that's what I plan on doing.

 

I have never, ever, ever heard of such a thing??? In aircraft, high time pump changes are the norm but then again a broken pump means falling out of the sky in some cases. My 99 explorer went 189k on the same pump and still going. My sons POS Firebird made it 60k and the first replacement pump only 4k more. If it isn't broke don't fix it, change the fuel filter regularly, use " top tier" gas and don't run your tank down to fumes where the pump can become exposed and heat up. Ie if the fuel light comes on get gas don't push it to 4 miles left on the computer.

 

Replace the pump when it fails. Until then, replace filters regularly and use fuel system cleaners once in a while. Dump a spoon of ATF per tank or "Marvel mystery oil" into the tank after using the cleaner. You'll be presently surprised how long a fuel pump can last, if well taken care of.

Dirty and rusty tanks are common in old cars. Frequently running the car on reserve (i.e. pumping all the dirt from the bottom of the tank) will kill the fuel pump in a hurry. It will also clog injectors.

 

1995 4.0L VDP: I'm 3rd owner, acquired in 2010 with 63K mi. Has 157K now. 2nd owner is a forum member and provided complete maintenance history for his ownership. No record of either a pump change nor CKPS, both widely held as 100k parts, and I haven't changed them. So it either was replaced it was likely under warranty with 1st owner.


I average 16.9 gal per fill-up (yeah, there's an app for that) but have been to "0 miles" in the range display more than just a few times and have put in 20+ gal.
I'll probably regret this post as both components will likely crap out shortly after I brag on them.

 

When you fill up, how much range is left compared to the fuel gauge on the dash?
I average about 18 gallons when my range has about 20 miles left so I always assumed the tank capacity was 19 gallons instead of the 23 that I've read on other places.
There are also times were I've had about 6-8 miles left on the range computer and I filled up 18.5 gallons and the gauge was all the way at empty needle.
Is it safe to say our tanks are 23gallons and I can maybe push it a little further if I ever have the need?

 

I have been taking my car to a Jaguar guru here in So Cal. He's been working on them for about 40 years.

First thing he said to me was "Never run your tank lower than 1/4 tank. You will burn out your fuel pump sooner rather than later"

Trying to squeeze the tanks to empty in these cars is not a good idea.

 

Just like tires - why replace unless completely worn (or has failed and can't be patched).

 

Folks say the same thing about our ST1300's - the bike has two tanks, the one under the seat holds about 1.3 US gallons and houses the fuel filter and pump. In this configuration, the fuel serves a secondary purpose: to keep the pump cool.

 

Not too safe: I believe the capacity is 21.3 US gal./81 L
Bob (Motorcarman) posted a TSB that states how many gallons are left when the low-fuel-caution illuminates, I believe it was 1.5 or something, can't remember exactly. My sphincter doesn't start gathering up seat-cushion with a low-fuel-caution, nor even with the gauge on "E" - but if I have those conditions AND I'm approaching 400 mi on that tank - I start to pucker!


I WISH it was 23 gal!!! I actually thought it was 25 or so when shopping for my X300 but soon learned otherwise. Seems I read of a fairly large fuel tank on some model of XJ, maybe the X350 will hold 25?


Probably a sound practice, for pump-cooling, but I can't roll like that. My commute is 100 mi/day. I can't be bothered to top-up every other day. Even so looking at the average from my phone app, I've got 4.4 gal left on the avg fill-up which is not that far off at 1/5 vice 1/4 tank....still, from a seat-of-the-pants recollection, seems to me I've almost always got the low-fuel-caution on when I top-up. For instance, my last several fills were 18.167, 17.685, 10.74, 19.599, 19.686 gal's. In my case, it doesn't seem to have impacted pump life (though it may fail tomorrow)


I sure wish it had a 44 gal tank like my Excursion.....

 

For what it's worth, mine seems to be failing, at about 140,000 mi. I think it's the original, although I've only owned the car since 83,000.

 

Yeah, it's a little annoying to fill up with a 1/4 tank left but I trust this guess knowledge. I'm willing to deal with the minor inconvenience.

 

my XJR6 has 249,000 k,s and they are both going strong and quiet

 

Should not one just replace the fuel?
And often?