air in diesel

Paul Zajac · 08-29-2009, 04:54 PM

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 · 08-31-2009, 07:33 AM

Quote:

Originally Posted by 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?

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 · 09-01-2009, 12:42 AM

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

to performance !

Paul Zajac · 09-01-2009, 04:43 PM

Quote:

Originally Posted by freesaxon

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 · 09-01-2009, 04:47 PM

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 · 09-09-2009, 07:08 PM

Could be problems with your injectors ?

oily rag · 10-11-2009, 02:57 PM

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.

08-29-2009, 04:54 PM	#1 (permalink)
Paul Zajac Junior Member Join Date: Aug 2009 Location: co durha Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts	air in diesel 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?

10-11-2009, 02:57 PM	#7 (permalink)
oily rag Junior Member Join Date: Oct 2009 Location: essex Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts	air in fuel line 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.

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09-01-2009, 12:42 AM	#3 (permalink)
freesaxon Junior Member Join Date: Aug 2009 Location: Great Britain Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts	Paul I have the same bubbles in the fuel line, it doesn't seem to make any diffrence to performance !

09-01-2009, 04:47 PM	#5 (permalink)
Paul Zajac Junior Member Join Date: Aug 2009 Location: co durha Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts	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?

09-09-2009, 07:08 PM	#6 (permalink)
freesaxon Junior Member Join Date: Aug 2009 Location: Great Britain Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts	Could be problems with your injectors ?