XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

My x300 needed a playmate...

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Old Nov 16, 2021 | 11:42 AM
  #1  
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Default My x300 needed a playmate...

... So I bought an XJS! Say hello to Jasmine!



As my son is using Ruby the X300 as a daily, my wife said we needed to get something fun while we were young enough to enjoy it (we're grand parents now). This particular XJS has been taunting me all summer. I thought it sold, but it came back up right after the "young enough" comment, so I reached out to the seller, and it's now the second Jaguar in the fleet. Its a 1996 4.0 wearing her original paint, top and interior. It's a nice 20 footer and the flaws are just enough that I won't mind driving her.

Issues to address first are the alternator and a high idle that I hope to tackle this weekend. Could use some new trunk struts and I'm sure will will be due for some other maintenance before I plan a spring outing. I'm sure I'll make a list that reaches the floor before the week is out.
 

Last edited by SparkyGage; Nov 16, 2021 at 11:50 AM.
Old Nov 16, 2021 | 01:11 PM
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SparkyGage,

Great purchase! I really like that late Turquoise colour on the XJS!

I'm sure you have your own views as to whether you love them or hate them, but I'd remove the somewhat ungainly add-on rubbing strips and definitely remove those rust-promoting chrome arch covers!

Enjoy the car!

Paul
 
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Old Nov 16, 2021 | 01:53 PM
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Fantastic color on an XJS convertible.
 
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Old Nov 16, 2021 | 02:18 PM
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Great lookin' car! Enjoy, enjoy.
High idle is an easy fix. There's a small allen screw on the top of the fuel pressure regulator in a little well. You have to lean over to see it. It turns clockwise to increase, counter to decrease. Adjust it when motor is warm, trans in "park". I find a small turn and checking the tach until it reaches about 750 works on my 93 4.0. Have the alternator output checked at your local mech/garage. Don't trust the alt gauge...analog reading is always "iffy".

Good luck!
 
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Old Nov 16, 2021 | 10:04 PM
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Originally Posted by 92/93 XJS
Great lookin' car! Enjoy, enjoy.
High idle is an easy fix. There's a small allen screw on the top of the fuel pressure regulator in a little well. You have to lean over to see it. It turns clockwise to increase, counter to decrease. Adjust it when motor is warm, trans in "park". I find a small turn and checking the tach until it reaches about 750 works on my 93 4.0. Have the alternator output checked at your local mech/garage. Don't trust the alt gauge...analog reading is always "iffy".

Good luck!
That won't exist in an AJ16 engine.

Clean out the throttle body. It's best done by removing it from the intake.

If that doesn't do it, you will need to get it reset by a PDU, WDS, Mongoose, VCM1 (not 2), or some dealer still equipped to reset the TPS. There is a manual way to do it. While you have that throttle body off, enlargen the two holes on the TPS and then tighten the two screws holding it in place just tight enough that you can still move it by hand with some force.

With the throttle body back on the car, you should be able to adjust the position of the throttle body so that its idling at about 700 cold, 580 hot. Once there, tighten those two TPS screws all the way! You'll be doing it by feel.
 
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Old Nov 16, 2021 | 11:02 PM
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Hellooooooo Jasmine! She's pretty.
 
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Old Nov 17, 2021 | 09:55 AM
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Originally Posted by Keesh
Fantastic color on an XJS convertible.
I can see from your signature that we are "Brothers from different Mothers" as we say around here.
 
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Old Nov 17, 2021 | 10:16 AM
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Originally Posted by SparkyGage
I can see from your signature that we are "Brothers from different Mothers" as we say around here.



 
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Old Nov 18, 2021 | 08:55 AM
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Originally Posted by Vee
That won't exist in an AJ16 engine.

Clean out the throttle body. It's best done by removing it from the intake.

If that doesn't do it, you will need to get it reset by a PDU, WDS, Mongoose, VCM1 (not 2), or some dealer still equipped to reset the TPS. There is a manual way to do it. While you have that throttle body off, enlargen the two holes on the TPS and then tighten the two screws holding it in place just tight enough that you can still move it by hand with some force.

With the throttle body back on the car, you should be able to adjust the position of the throttle body so that its idling at about 700 cold, 580 hot. Once there, tighten those two TPS screws all the way! You'll be doing it by feel.
Thanks, I'll check into this. My initial inspection indicates all the mechanical parts are in their correct or "lowest" settings. The PO had replaced the upper O2 sensors in an attempt and said that it did improve it from 2k down to the 1500 it is now.

At the moment I'm still looking things over and taking inventory of what's been done (and needs to be re-done).
 
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Old Nov 18, 2021 | 09:03 AM
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Originally Posted by ptjs1
SparkyGage,

Great purchase! I really like that late Turquoise colour on the XJS!

I'm sure you have your own views as to whether you love them or hate them, but I'd remove the somewhat ungainly add-on rubbing strips and definitely remove those rust-promoting chrome arch covers!

Enjoy the car!

Paul
Thankfully the car has been in the drier climes of the US and I can't find any sign of rust anywhere. The rubber strips will probably be dependent on whether or not I do a respray. It could stand to be re-cleared, but the color coat is intact. I am noticing the chrome strip just above the rubber is starting to separate from the plastic, so I'll need to consider that as well. A lot of the appearance aspects will be up to my wife as this is very much her car as well.
 
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