I use the car nearly every day for a 40 mile trip to work and it has been fine for quite a few months now. Anyway come to use it on Monday and the revs are way to high and the gear shifts are all over the place (it's an auto).

 

So last night I put the Datascan on it and TPS is reading 0.9v at idle and I cannot adjust it any lower, reset the ECU and it's idling much better but the only adjustments to the TPS I can seem to get are from 0.9v up to about 1.3v at idle.

 

So has my TPS died or is there a chance it's something else.

 

Cheers for any help,

 

Gaz

dont know about your problem bud, but if you need a replacement give me a shout

Have you tried to reset the TPS? disconnect the TPS and switch the ignition on for a bit and it will reset the self learn data for the TPS and you should get the proper voltage readings back, the symptoms definately sound like TPS related and I also have a spare one if you need it.

Thanks for the replies both of you and for the offers of a TPS

 

 

Hi Richard,

 

I did disconnect the TPS and used the datascan to reset the self learn which helped bring my revs down, but the minimum voltage I can acheive is still 0.9v, so I suspected the TPS.

 

Thanks for the offer of a spare TPS and if it's OK with you I'll take you up on that especially as you're so close by and can meet up with you and pick it up.

 

I'll PM you some contact details.

 

Gary

Oh poo! :(

 

Got a new TPS today and it's made no difference. Still reading 0.92V with the datascan and no amount of adjusting changes this voltage. Car is running pants, so I'm not driving it now :(

 

Anyone have any ideas why the voltage will not adjust, why is it so high?, can't be the TPS itself.

 

Checked the fuses (just in case) and now wondering if there's a wire broken somewhere, but it all looks fine.

 

May well do another check tomorrow with a multimeter and possibly take the TPS right off and see if it will adjust down, but I think I already know the answer to that.

 

Still not all bad news, I believe I found and fixed a boost leak today that's been causing a loss of power under load, but I won't really know until I've sorted this TPS issue.

 

Gaz

Cable fault, the loom has many shielded cables intertwined and often pressure points result in faults across single or even multiple sensors, best bet is to remove the ecu and do a test between the tps and the ecu see for shorted cables, note the tps switch cable also serves the temp sensor in the loom so other areas need checking too, you will need the wiring diagram to do this correctly.

 

Daveman

Well well, had another go at sorting this today .... er well yesterday I suppose and it's all fixed now.

 

Removed the new TPS and could get 0.42V, so put it all back together and reset it all again and it's fine. I'm not convinced it was anything I'd done, so I'll have to watch things for a while, but I'm just glad the car is running nicely again, well nearly nicely, just need to get the back end sorted out as it's very twitchey, so I suspect either an alignment issue or a HICAS problem.

 

Anyway :) :dance:

 

 

 

Gaz