Greetings,

I guess the admins (MFWIC) disabled my account due to lack of use?
Anyway im back, originally joined May 2008.
Bought car with 2500 orig miles.

1983 VDP 4,500 original miles/ looks like new.
Problem to work on because everything under the hood looks new!

Last year changed water pump and all belts/ related hoses.
It was a PITA.

Checked distributor timing and advance curve, everything was clean and
not sticking.
Also checked the air-valve door for non-stick movement.
Did this at the time because I felt the power seemed lacking.

Latest problem seems fuel related.
Starts fine, stumbles if you try to accelerate other then a crawl until it is up to temp for a while.
If you attempt to full throttle you get a light pop in the exhaust.
This (lean pop) lessens as car gets hot but never goes away completely if you go to full throttle.

I don't remember having this problem during the cooler months but I obviously do not put many miles on this car.
It is very sluggish and faster with less throttle rather them more.
Seems like problem may be fuel related.
I took the car on the highway to attempt to blow out any cobwebs but it
did not seem to help.
If it was a carburetor- I would say the accelerator pump is faulty!
I just replaced the fuel filter in the trunk - it was not clogged.

Is a fuel pressure test the next step?
Is most informative/ easy access port at one of the injectors using a length of hose and a "T" fitting?
What fuel pressure (PSI) should I expect after the regulator at the fuel rail?
If I pull the vacuum hose to the fuel regulator what PSI should the pressure increase to?

In addition problem occurs regardless of which fuel tank is selected.
I topped off both tanks, but tanks may still contain a bit of Winter gas left over.
Exhaust at idle is like a newer car with almost no odor.
If you put you hand over the exhaust pipe it is clean warm with no residue.
This seems a bit too clean/ lean.

Thanks for any advise.
(Doug are you still out there?)

Sincerely,
Ben (OB1)

 

Welcome to the forum.

Good to have you with us.

Post your tech question in the XJ6 section.

Yes Doug is still with us.

Sounds like the car is a museum piece, either that, or you have been away somewhere for a looong time.

Any pics?

 

Welcome back to earth,

4500 miles on a 1983! Got to see pics of this.

Follow this link XJ6 & XJ12 Series I, II & III - Jaguar Forums - Jaguar Enthusiasts Forum to the XJ section to post about your fuel issue. Doug is still there.

Graham

 

nice..good to see you back

 

Welcome to the forum,

Good to have you back with us.

If you haven't done so already you should add your car details to your signature to help others to help you.

 

Greetings, I did a double post to the XJ6 forum, no reply's yet. I can't upload pix because my account is still limited (unless you fix it) Cheers, OB1

 

Hey there OB1 n Welcome aboard Jaguarforums, good to have you here with us
+1 on the useful advice already given.........

There's a really great mix of information, camraderrie and fun here.....

I've manually upgraded you to full forum access so you can better view the whole site and all its features
You now have the Force on your side....lol

PS - If you want to drop me a pm with your old details I may be able to resurrect and merge the two accounts for you, if you wish?

Jump on in and enjoy the site.................