80 TDi Couple of probs/questions

[Marc97]

Just been out to see if I can stop my alternator belt squeaking but couldn't work the tensioner out buts that another post.

LOL.

Ta mate.

[Ally80]

Hi there, been experiencing the same probs as yourself.I bought a brand new Accelerator Pedal Switch from ebay(£30),fitted it and this has solved my accelerating problems.The motor is now going like a rocket, chuffed to bits!!
Also informed member pcar964 of this fix.

Cheers

Ally 80

During a 3 hour drive today, I realised that it might not be the throttle position sensor.
When I change gear and the throttle revs itself, it then drops down slowly. Does this not mean that it has sensed the release of the pedal?
If so, the sensor is working, I am thinking that the problem might be pump/injector related, either the pump is not reacting to the release of the pedal due to some sticky mechanical part or one or more of the injectors are dumping more fuel than needed (leaking) into the bores which is then being burned resulting in the higher revs.
Whichever one of the 3 options it is, due to the cost of each part, trial and error isn't an option, the faulty item MUST be diagnosed.

[HF1600ie]

I dont believe the 1Z engine of the Audi 80 has a VNT type of turbine, which means "variable nozzle turbine". The Geometry of the turbo does not vary (it does in the AFN engine of the 1996-99 110bhp Audi A4, for example).
So, the vanes of the turbine only get damaged with carbon deposits due to low traffic and slow driving in other TDi (recent) engines.

However, i do experience an excessive "Decreasing load" when shifting gear, feeling that the ECU injects extra-fuel to sweeten the gear changed. I have to lift the right foot a bit before the clutch, otherwise i will experience an increase in revs while shifting gear.
My Seat Ibiza with AFN engine 110bhp, doesnt have this , and honestly goes sweeter. Something in bettween could be more useful. Thinking of an ECU remap to fix this and and a bit of extra power.

Cheers

Henrique

Portugal

Thick mode again. Whats a VNT?

Thanks for the reply, I'll try and clean out the 'VNT' asap and report back.

PS, I have owned TD cars for quite a few years now and I am used to plenty of lag at low revs although this is my first TDi and my first electronic throttle car. The feel of the throttle is eerie in comparison to my other cars.

[motchy87]

Hi Marc,

That describes it really well. Pressing pedal results in nothing, then a sudden surge as turbo kicks in. Also experience it in other gears if I come of the throttle or coast, then apply throttle again - no power.

Lack of power when pulling away in first sometimes means steering is very heavy as if the power steering belt had snapped.

I hope we can find the cause and the solution.

Peter

Hi pcar964 and marc97, I currently have the exact same problem on my 1993 Audi 80 TDi Avant. Did you solve the problem in the end? Thanks

[pcar964]

Hi pcar964 and marc97, I currently have the exact same problem on my 1993 Audi 80 TDi Avant. Did you solve the problem in the end? Thanks

Yes, like ally80's post; new throttle position sensor solution solved it.

[Ranana_Mine]

you can see all the pages a visitor looks at when browsing the visitors and clicking the look for the last page and thats the last page they browsed, is that what you mean?