I have one (1) major question for this forum:

Has anyone ever searched for an alternative to the extremely expensive TPS for the Jaguar XJS.

I have been trying to figure out if anything exists. My problem is that I am not an Electrical Engineer.

What other than physical size equivalents is key? I have seen a couple that physically look extremely similar and sell for pennies vs the $500 price tag for one that says Jaguar XJS.

Appreciate all responses

Thanks

Softball60/Paul

 

I started that research , the rumors were that some mustang had a compatible one. Basically any 90 degree 6kOhm potentiometer should do, just need to connect it mechanically.
At the time SNG Barat had TPS sensors for $120 or so and I bought it as I didn't have too much time. (EAC2670, if you have the same they are now $152.83).

update: it shows 'out of stock' but available for ordering.

 

What's the problem with the one you have?
Just curious.

 

I've used the Mustang TPS on two V12s. The first time, years ago, it worked out fine. More recently I used one on my present V12 and it failed after a few months so I splurged for a not-so-inexpensive replacement for the old "Bournes" type TPS.

But, being that Paul is asking about a TPS for a 1996 XJS I'm betting we're talking about a 6-cylinder car. I'm no help on that.

Cheers
DD

 

You are correct, it is the 6 cyl.

Nothing is wrong with mine but it is a used unit off of another xjs. I believe it will eventually fail and I will have to purchase another used unit or spend big money on a new unit.

I have seen other units that look identical and sold for other ford vehicles at very reasonable costs.

Just trying to find out if anybody has been able to come up with a low cost solution!!!!

Thanks

Softball,60/Paul

 

There is no known low cost solution, the ford ones spin in the opposite direction. Brand new TPS is 225 bucks from JLR and will last you another 25 years.

I have one in unknown condition but might keep it. I had a dozen of them that I sold on ebay for 50 bucks each.

 

If you're going to buy one, just buy it new.

These things are notoriously problematic with age. They won't give you a code, and the problems they create seem random. I had an issue with my long term fuel trims, it was pegged at 10%. Threw every part I could at the problem, but eventually it ended up being a dying TPS. It bench tested perfectly, using an analog multimeter. In reality, it was doing something that was throwing the fueling off. Once replaced, I've had a 0 LTFT since!

Actually, I'm lying. my LTFT crept back up to the 7% area. Once I replaced the wire and harness, pin to pin, from the ECU all the way to the sensor, it has stayed at 0.

Could the TPS have been good and the wiring bad? Yes, it would appear a possibility that I did not test/check. I only recently replaced the wires (upgrading it to a 16g GXL wire and replacing the heat wrap AND adding the rubber boot). It wasn't terribly difficult, except that two of the wires splice into the EGR. I couldn't figure out how to remove the pins from the EGR harness, so I butt spliced them for now, but I intend to try again or solder and heat shrink it later.