Throttle pot... couple of queries

[pupp]

I've trawled through loads of threads after searching but not found the answers so sorry if it's old ground...

a) Is the potentiometer a TVR specific or is there a preferred proprietary part (manufacturer and part no. would be appreciated, if so)?

b) On mine, the wires are brown, green and lilac... anyone know acoss which two the voltage should be measured for checking/set-up? These colours differ from any write-ups I've seen and I'm just getting random results when I measure different commbinations (I'm assuming the thing is fritzed, hence a) above)

Cheers for any input

[chassis 33]

Take a look here www.rangie.com/files/167_387.jpg for pot testing.

As for part number I think is the ETC8495 correct part number, but let somone else confirm that before you got out and buy one!

Regards
Iain

[Ballistic Banana]

take a look on this thread aswell, it maybe of help [url]www.pistonheads.com/gassing/topic.asp?t=148902&f=9&h=0&hw=[/url]

Good link Iain

BB

[chassis 33]

The whole diagnostic procedure is here www.rangie.com/articles_topic.php?id=167&cat=7&subCat=51

There is a PDF version out there I stumbled on a while back, but didn't save the link.
Regards
Iain

[pupp]

Cheers fellas... that's great

[Cider Andy]

The ETC8495 part number that Iain gave you is correct (it's a Land Rover part number, Rimmer Bros list it as an ETC8495A). It's made by Lucas, their part number is 70408A. You may find the cheapest place to buy is from a TVR dealer, but don't expect much change from a £100

Removing the potentiometer and testing its resistance with a meter is easier than measuring voltages across it in situ. A decent meter will show that the track has the correct resistance and that the resistance between either end of the track and its wiper varies smoothly, but a proper test would require an oscilloscope, which would pick up any minor imperfections (which might also be seen by the ECU).