So I've been working on this replacement TPS for sometime now and I finally have a working model. I got this idea after @Greg in France france posted about his use of this TPS for the V12 engine. I recently had to replace my TPS unit as I threw a code and it was defective. Replacements seem either very expensive (500.00 on ebay) or a used one, which I did (but scarce). I contacted the company to see if they made a "D" slot version of this, which they did. However it was too small to fit the footprint of the original TPS. So I came up with an adaptor plate to make up the difference made from an aircraft grade aluminum. I also found the original connector for this as well. So this is how the unit is set up. Firstly it uses hall effect technology, ie no physical wiper to wear out. The unit is sealed, so no oil leaking into the body. So if you're not familiar with how this unit is set up, half of this TPS controls your ECU, the other half controls the transmission ECU. They work opposite, engine ecu goes from .5v to 4.5v, while the transmission ECU goes from 4.5 to .5v. I had to custom order this to fit our beloved AJ6, It does the following: 90 deg rotation, voltage range .5 to 4.5v. There were some other options, but these were the two most important. There is a more commercially available versions of this, but the low end voltage is .25v, which I thought would be below the lower threshold to throw a code which i understand is .2v, but .2 what? .23, .24 .25, get the picture, better to have it what Jag spected it out to be at .5. (this is actually at the low end threshold, but since it can't go below that, should be just fine). So it mounts simply to the adaptor plate with simple hardware, and then to the throttle body. Just line up the D slot. You adjust it as you would normally to .5v. The only issue I've run into is the connector pins, they're large for the small wires that come with it, but I managed. So you have two options here, splice into the original wires. I would solder them and use a shrink tubing if I went this route. I installed them into the pins I ordered and added a small dot of solder at the actual wire crimp. They seem secure enough. After doing this I thought I should have added a small piece of shrink tubing over each individual wire for some added vibration resistance, but there is one other reason. The back of the connector has these sealing plugs that slide over the wire (also give some vibration attenuation) but because the wire is so small it kind of floats in the center rather than a tight fit. A bit of shrink tubing over the pin should fill this gap just right. So here is what I'm looking for. Some people to test this out in their vehicles as mine is currently in pieces between a head job and a complete interior remodel. Cost is 210.00 (Includes shipping to USA) (these are still expensive) but a lot less than 500.00! That comes with everything you need. This is a kit that you assemble and take all responsibility for, I'm simply supplying the parts. Obviously if there is an issue I'll refund you. Here are some pics of this installed on a AJ6 throttle body I had (had to purchase the whole body to get the TPS sensor). The XJS has the same mount as this. I have to do a minimum order on these, they let me order just 5, but originally it was 10. I have 4 to sell to have tested out if you will. If there is interest I'll keep ordering the parts needed, but will probably get enough orders together first prior to ordering. Post any questions here gents and I'll get back to you asap.

 

I do not have an AJ6 engine, so I cannot participate in this exercise, but you will want to beef up the wire diameter since those rubber boots provide protection from weather and moisture.

Amazon sells a kit. Should be able to lock in and buy a bunch in the right size?

 

are you referring to the wire seals? I left them loose as I was waiting until I confirm the wiring, but yes that is was what I was referring to needs to be a little tighter fit..I think the shrink wrap should do the trick.

 

Monkfe
Are you sure that the Variohm sensor self sets when you switch on? I thought that they did, but in fact the ones I have do not. They have to be set to the closed voltage.

 

No they do not, I may have thought that from your posting, they are set up just like a normal TPS, but at .5v.