While doing a car test last year, my Octavia 1.6 petrol failed as the tester could not get the revs to remain at 2000rpm to test the emissions. The problem is while in neutral and you press the accelerator lightly, the revs go up. Slightly lowering the pressure on the pedal has no effect so revs keep going up and eventually the foot leaves the pedal and the revs go to idle (800rpm or whatever). No matter how often you try, its impossible to get the revs to remain at a constant value other than when idling.

The tester suggested it was a dirty throttle body so I cleaned it out and retried the revs. Still no joy.

Brought it to the mechanic and he cleaned it out more thoroughly. Still same problem. I got a 2nd hand throttle body from a breakers yard and the mechanic replaced it. Still the same problem. So it could be that both suffer with the same fault but likely not.

Can anyone think of anything else to try?

Engine details are

Octavia 1.6 AVU

Throttle Body Part Number 06A 133 062 AB

Thanks

Worn potentiometer in the pedal?

Worn potentiometer in the pedal?

I'll say it to the mechanic to check. Thanks

I'd assume the mechanic has checked for things like air leaks on the manifold, split hoses etc.

Any lights or fault codes showing?

I'd assume the mechanic has checked for things like air leaks on the manifold, split hoses etc.

Any lights or fault codes showing?

He says he checked everything he could think of. He suggested maybe its a ECM fault and try get a Skoda dealer to reflash with updates. I don't know if a dealer will do this as I have not been near one since 2002.

Its due the NCT again in March and it passed the 2nd time round last time even though this problem still existed so maybe it'll pass again with a bit of luck.

You need to get VCDS diagnostic done. It could be a simple as a failing coolant temp sensor causing the ecu to fuel incorrectly.

You need to get VCDS diagnostic done. It could be a simple as a failing coolant temp sensor causing the ecu to fuel incorrectly.

I know he used a diagnostic tool with the car but have no idea if its a VCDS type or some basic generic tests. Would it be worth bringing it for its next service to a Skoda dealer? Might cost a bit extra but at least it might get the problem sorted. Its really annoying though as you would not notice when driving the car and I doubt its causing any long term damage.

Hi,

Did you ever get the problem sorted with the Octavia throttle control?

I am having the same problem with a 2002 Octavia (1.6 petrol), and I cannot find the reason.

Any help or suggestions as to the possible cause would be much appreciated.

Thanks.