Hi all.
Yesterday when driving to work I had a few stumbles, felt as though it wasn't making the 1-2 shift so I thought it might be a trans issue. On the way home in warmer temps it stumbled a few more times. If I eased into the gas it would do alright for a bit. It finally quit on me pulling away from a light and I got a tow home after it wouldn't start. When 8t died I quickly tried switching tanks but it was struggling to make it to a few hundred rpm ajd I shut it off
It looks like it has good spark and fuel pressure. It started and ran after it had cooled off.
When I checked fuel pressure the pump was quite noisy so ordered a fresh pump and filter.
I will also try throwing a fresh 5 gal of gas in it this afternoon because both tanks are low and the gauge may be unreliable.

Any further tips from the gurus?
Thanks!

 

Could you have simply run out of gas? Sometimes if you do it takes a while to get restarted with gas added or on the other tank.

 

Goop from the bottom of each tank. Lesson, refill at 1/2 tank !!

Sorry !!!

Carl

 

When you remove the old filter don't toss it right into the trash. Instead, empty the contents into a cleaner jar. What you see, or don't see, may dictate your next steps.

What year and model, specifically, are we discussing?

Cheers
DD

 

My son's 87 XJ6 did that last summer when it was hot and driving in town. He keeps his tanks topped off. We replaced the fuel pump and filter and problem fixed.

 

Got it sorted. Tank was close to empty, splashed 5 gallons in and all is better, makes about 35psi. I will replace the pump and filter soon when I sort out the sender issue on the right tank and leaky left tank.

Thanks

 

While you are at it. Remove the "soft" plugs in the valences behind the rear wheels. Few have been able to remove them w/o destroying them. I, not one of the few.

You will find drain plugs!! A small one within the larger. With a catch pan available l, open them. Crud to fall out. great. Now, the pickup tubes will have "socks". One option is to remove and replace them.

You ill need a fresh "o" ring to restore the seal, unless you are very lucky. I did not, My turn for the favor of Lady Luck!!

Keep the tanks at least at 1/4 !!!!

Just tanked up my Jeep to avoid "bottom feeding". Carbs don't like it and EFI doesn't either.

Carl

 

 

When the engine is cranked the contacts in the AFM are bypassed. When the key is released from "Start", this bypass is closed, and volts to the fuel pump relay go via the two contacts in the AFM that are a well-known failure item. See here from AJ6 Engineering:-
Fuel injection and the Jaguar XJ6 4.2 Series 3 / AJ6 Engineering
See first paragraph of "Airflow Meter Problems"

 

I have had a couple of Series 3 XJ6 cars and still have one. My son also had one so we became quite familiar with some of fuel tank and pump problems.
I endorse JagCad statements about removing the "soft" plugs, draining the tanks and cleaning the filters.
We also introduced an in line filter between the fuel tanks selector valve and the fuel pump. This stops the typical crud from getting into the fuel pump which we found to be a major problem.

I had to recently replace fuel pumps on an old Subaru Forester which is a tow vehicle for my ex military aeroplane and a Mitsubishi Colt which is our "shopping trolley".
Both submerged pumps had filters on the intake pipes which would obviate crud getting into the pumps.
So it makes sense to protect the XJ6 pump with a similar arrangement.
Bill Mac
Mk1
MK2
S3XJ6
X300
Ford Falcon utility
Mitsubishi Colt shopping trolley
Subaru tow car (lives in the hangar)
Past Jags, 14 ranging from MK7 to X308 over 58 years