bi77yboy

Morning all went to start my a8 2.8 quatro sport this morning started then stopped. Now it will not start and the accelorator pedal feels weird like no tension or anything. Any ideas people please

silverd2

One idea jumps right out at me: Have you looked under the hood?

jfrahm

Right. I doubt a 2.8 is Drive By Wire so there is every chance the throttle body is stuck open or the return spring is broken or the throttle cable is broken.

It's a bit unorthodox I know, but it might indeed be time to check under the hood.

twentysevenlitres

The 2.8 in the A8 is the 30V engine and is most definitely Electronic Throttle.

The accelerator pedal has an accelerator pedal sender and shaft spring arrangement not dissimilar to that found on manual throttle bodies.
As your throttle "feels weird" I'd be looking there:

jfrahm

I think DBW turned up partway through 1999 so if it is an earlier car it might have a traditional throttle cable? We did not get a V6 option in the USA so I've not looked one over. To be fair we did not get the W12 either.

twentysevenlitres

I stand corrected.
Just checked out parts-catalogue.info and it lists the AAH 12V engine for the 1994-1996 model years.
They will have a cable throttle.

The 30V V6's turned up in the first half of 1997 displacing 2.4L and 2.8L and supplanted the original 12V V6's which displaced 2.6L and 2.8L.
(The 2.7 twin turbo engine (B5 S4 and C5 Allroad) was effectively created by mating a 2.4 engine with a 2.8 crank.)

All 30V engines are DBW.
All 12V engines are cable throttle.