For anyone trying to source a non-jaguar TPS the resistance readings are as follows
(looking at the pins sticking out of the TPS)
4 3 2 1
Pins 1-4 2.24 K
Pins 1-2 closed 1.03 K WOT 2.4 K - this is pad 2 in post #8
Pins 1-3 closed 120 ohm, WOT 2.4K

 

Just taken some measurements of the Denso 198500-3300 TPS, as used on the X400 2.5 & 3.0, X202 2.5, 3.0, 4.2 & S/C, and the the X350 3.0, 3.5, 4.2 & S/C

Pins 1-4 = 2.272KΩ
Pins 1-2 Closed = 1.448KΩ
Pins 1-2 WOT = 2.376KΩ
Pins 1-3 Closed = 0.736KΩ
Pins 1-3 WOT = 2.169KΩ

Compared to Steve's measurements on the Denso 198500-3250;

Pins 1-4 = 2.24KΩ (very close)
Pins 1-2 Closed = 1.03KΩ (close but a bit out)
Pins 1-2 WOT = 2.4KΩ (very close)
Pins 1-3 Closed = 0.12KΩ (quite a way off, but also offset as 1-2)
Pins 1-3 WOT = 2.4KΩ (reasonable close)

Bear in mind the following;

1. My multimeter is a cheap one

2.I have made the measurements with the TPS still attached to the TB, so the closed position is not 0°, more like 7.5°, and if you turn the butterfly to the stop it goes well past 90°, so the WOT was positioned by eye.

If an XK or X308 owner wants to try fitting this TPS to their car let me know and I will send it to you (so long as I get it back or cash/goodwill in return).

 

Yes it is always a good idea to have a "smoke net" at the ready when these things occur.

 

I saw this, thought it might be of interest, don't know if you guys have seen it already...

https://www.jaguarforums.com/forum/x...-3300-a-82398/

 

We're looking at compatibility.

 

Looking at it from a different angle, what is the unit used on the Lincoln LS 3.9L engine?

As it's a Ford part, there may be a common sensor available via Ford's parts?

Anyone got access to an LS TB?

Looking through the Tomco-inc TPS parts list, the Lincoln LS 3.9 TPS info is as follows,

*(2003-2000 3.9L (A) 242") OE#F4SF-9B989AA type=PFI part #=14039 - can someone in the USA call them about a price?*

The above info would be useful to early S Type and AJ27 engine owners?

Page 340
http://www.tomco-inc.com/Catalog/tps%20sensors.pdf

*See page 357 for their version of the Denso 198500-0330 is #14135 can someone in the USA call them about a price?*

Also, the Range Rover 4.2 lump is the same engine, I just wonder if the TPS could be bought and used?
I'm going to call Brock LR on monday....if they can supply a TPS for a RR Sport SC at right money, I'll buy and bolt it on for a test, although this option would benefit 4.2 owners I guess (Denso 3300) It might be better to test on an XK/XKR X350/358 and later S Types...personally feel the denso 3250 and 3300 are close enough to swap, just hope it works...

 

From pictures from eBay listings in the states, it appears that the 3.9L LS V8 has a completely different TB to the Jaguars. No luck...

I'd already seen the tomco catalog, it's another dead end.

The Range Rover might be the same since they are in essence the same engines. But i would be surprised if they actually sell the TPS separately...try it, see how you go.

 

If it fits physically, and the resistance ranges are the same ...

 

This is the programmable contactless TPS - the two outputs are factory programmable to map any twin pot TPS
Penny + Giles | Throttle Position Sensors for OEM's, teams and enthusiasts
The only thing I can't find is exact price - somewhere around £120

 

That's a very interesting alternative. Given that it is digital, it could even be mapped with a curve that tells little white lies to the ECU and throttle motor.

120 GBP isn't unreasonable if the alternative is a new throttle body. But a $50 knockoff would be good too

 

This is the TPS datasheet.
I'm in touch with the manufacturer to see what programming they can apply.

 

OK they can provide any output span we want.
I'm getting a quote for 10 off.

 

Tomco says they have no cross on the number.

On the subject of the stock pots, the only critical part is the deposited film resistance tracks.

Some things to consider:

-- manufacturers hate to make new tooling when old tooling will do the job.

-- rebuilders can somehow rebuild these things

-- the only thing needed is the potentiometer disc and the pins

-- many tps have the same pin/layout/connector

Could it be that the rebuilders have access to a catalog of generic discs?

Could it be that the rebuilders have figured out which cheap tps they can use as a donor for the disc?

The only thing that is needed to make this work is that the disc have the same electrical characteristics and fit into the old tps carrier.

The way to identify likely suspects is to look at the static tps resistance tests in the matching factory repair manuals of each likely suspect. Toyota would be a good start as they use both Denso TPS and Denso ECM of various generation on almost all of their vehicles.

Or if someone, like an experienced procurement specialist had access to the right catalogs then it becomes much easier

 

To summarise the quote from Penny and Giles with programming, delivery to UK and VAT we're looking at £180 ish each.

 

That sounds like a good deal when compared to a new T.B..

 

It isn't a 'done deal' yet - I need to get a mod to the mechanics to fit the Jaguar TB but they seem excellent people to deal with.

 

I'm a newbie to the forum, please excuse any protocol breach. On the TPS replacement I wonder if a unit from a 2004 Lincoln LS V8 might work. 4 conductor, picture looks the same, Rock Auto site, Alternate/OEM Part Number(s): 3L5Z9B989AA, 5S9676, 6L2Z9B989A, 6L2Z9B989B, 6L2Z9B989C, 6L2Z9B989D, 6L3Z9B989A, TPS4212, TPS4224.
More Information for AIRTEX / WELLS 5S7264

 

2004 Lincoln LS TPS looks different than a 2003 and earlier. The 2004 looks to be a 4 conductor unit vs. a 3 conductor. Design looks very similar/same as XK unit.

 

The Airtex Replacement Unit for the 2004 Lincoln has 4 pins but the contact arrangement seems to be Different:

 

The important thing to look for is the offset on one of the pots. If the two track together the ECM will throw a wobbler.