primary vs secondary tps question

[kcc11]

Hi Tripps I had a similar issue twice before, once was the tube to the MAP sensor was slightly backed off and the other was "tracking" (arcing from one of coil#2's HT leads to the cam cover) caused by oxidised spark plug threads in the head, which made it easier for the current to jump from HT lead to earth (cam cover) than across the spark plug gap.
Hard to spot it only in darkness or if you have a keen ear.


Re the Primary TPS vs the Secondary TPS, the sec TPS cable is about 2" longer than the primary TPS cable.
Otherwise, on the outside, they are identical (same plug & body shape etc). Well - pri has blue inside and secondary has black - but we don't see colour lol

They work differently inside though. The primary's internal spring rotates it anti-clockwise, the secondary's spring rotates it clockwise.
This is so as the primary and secondary throttles rotate in opposite directions.

Both range 0-5000 ohms resistance on a multimeter, going from 5000 when turned fully anticlockwise, to 0 ohms when turned fully clockwise.

I wonder if you could use the secondary TPS in place of the primary, but you'd have to pre-rotate the springed inside bit before locking it in it's final position (same procedure for installing it on the secondary thottle)

Now that you say that I do remember having to clock the sensor more then usual to get it to feel right. I did it with a flashlight in a friends driveway to get it home from Austin. Took it to the dealership a few weeks later to have it replaced. Was told that Triumph would pay for the sensor but I had to pay about 200.00 for labor to switch them back with a new one. Three years later same problem. Ordered a new sensor from Baxters and found the secondary sensor still in the primary spot. Not happy about that. Still like to know where my new sensor ended up at.

 

[R-III-R Turbo]

Just to illustrate the difference between the primary and secondary TPSs;