air in diesel

[Paul Zajac]

2002 Octavia 1.9tdi Lauren and Klement. Noticed air bubbles flowing thru fuel pipe toward the engine. Is this a problem as I've noticed the idling RPM varies between 850 and 1100 rpm. Think this idling variation may also be responsible for the car 'surging' ie when going round a round-about with foot off throttle, the car seems to pick up speed. Anyone got an idea what I should do?

[Jazz]

2002 Octavia 1.9tdi Lauren and Klement. Noticed air bubbles flowing thru fuel pipe toward the engine. Is this a problem as I've noticed the idling RPM varies between 850 and 1100 rpm. Think this idling variation may also be responsible for the car 'surging' ie when going round a round-about with foot off throttle, the car seems to pick up speed. Anyone got an idea what I should do?

Surge on going round a roundabout may be caused by not switching off the cruise control or traveling in too higher gear with the revs dropping below 900.

I have a similar problem in fuel supply but the fuel get through OK adn doesnt cause a problem.

[freesaxon]

Paul
I have the same bubbles in the fuel line, it doesn't seem to make any diffrence to performance !

[Paul Zajac]

Paul
I have the same bubbles in the fuel line, it doesn't seem to make any diffrence to performance !

Thanks for that - any idea why the RPM is fluctuating?

[Paul Zajac]

Seldom use cruise control and usually in 2nd or 3rd on roundabouts so don't think it's that. Any idea why the RPM should fluctuate?

[freesaxon]

Could be problems with your injectors ?

[oily rag]

I have same problem. But my engine stops. And clear fuel line is then empty. I then have to remome return fuel line and top up filter before it will start again. So far i have changed all fuel lines. Any one got any idea.