350i 1987 throttle postion sensor

[tcpc]

hi,

has anyone had to replace there throttle sensor, if so what sort off problom was your having,

i.e
did it happen only at certion rpm etc etc

regards

tony

[danny hoffman]

Do you mean the pot on the side of the plenum?

[wedg1e]

LandRover bit; about £90

I phoned Lucas direct and it was about £60 + VAT IIRC.

You can do a rough test on the pot with a multimeter, but a better way is to set up a test rig with a PSU and some resistors and hang a 'scope on it. Then you can see the effects of a dirty pot track. The pot is supposed to be hermetically sealed.
The problem I had was that the wires had hardened with age/ heat etc. and snapped off at the point where they enter the pot body. I used a mini-drill with a burr to get at the solder lugs inside the pot, attached new wires and it works a treat.
The pot has to be pretty badly trashed to be unsaveable. In my case, the ECU defaulted to its basic setup and ran so well it was several weeks before I realised there was a problem. The later 'hot-wire' injection relies on the pot more but I presume you have a 4CU ECU with the flap-type airflow meter so it won't significantly affect the running. If it's really rough, it's probably something else (water temp sensor?).


Ian

[danny hoffman]

As Ian says, just unplug it and see how it runs.

There are 2 sorts, the earlier ones are pretty crappy and are no longer available. I have a mail with the procudure to recondition them if you need it - not that difficult.

Danny

[tcpc]

i got it tested to day by Mr hopkins indepentent landrover specialists and it tests ok,


it looks like i am back to the cam again ive put it off for as long as i can

thanks for your reply


tony