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Volkswagen Passat: 1998-2005 (B5) Passat 130 TDI PD injection problem at idle


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Last Post: Dec 14, 2013 8:01 AM Last Post By: tditunisia
Spakainz

Posts: 3
Registered: 06/07/09
Passat 130 TDI PD injection problem at idle
Posted: Jun 7, 2009 12:16 PM
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Hello. 2001 Passat 1.9 TDI 96kW (130 HP). The problem is very high injection quantity ad idle speed - 11mg/str, must be 3.0-9.0 mg/str. At higher speed injection quantity is normal, not reaching range. Engine's mechanical condition is good (compression test in all cylinders 27 bar(390 PSI)), max speed is about 200 km/h. No power loss appreciable.. Only one problem - high injection quantity at idle.. Any ideas....
BenTen

Posts: 1
Registered: 06/22/09
Re: Passat 130 TDI PD injection problem at idle
Posted: Jun 22, 2009 2:36 AM   in response to: Spakainz in response to: Spakainz
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Hi Spakainz

What is the values of air mass reading,EGR duty cycle and injection quantity when engine is cold and during the warm up phase? Can you post another screen shot of the diagnosis immediately after the cold start and then one during the warming up stage? Does the engine smoke white during the warm up phase?How does the engine behave during start up?
Spakainz

Posts: 3
Registered: 06/07/09
Re: Passat 130 TDI PD injection problem at idle
Posted: Jun 22, 2009 2:54 PM   in response to: Spakainz in response to: Spakainz
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Hi BenTen, when engine cold (at cold start), the values are almost the same...I think that i must to test tandem pump pressure at idle, maybe it to low....When engine starts rpm at moment oscillates, but only at the startup moment...I think it can be pressure of tandem pum.

Message was edited by: Spakainz

Burgermeester

Posts: 1
Registered: 06/23/09
Re: Passat 130 TDI PD injection problem at idle
Posted: Jun 23, 2009 3:34 PM   in response to: Spakainz in response to: Spakainz
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Hi Spakainz, I donít think that you have a problem with the tandem pump , but would rather agree with BEN TEN, observe your values after start the EGR should stay open for 2 minutes (value above 40%) 4% = EGR closed. Check if the values of the airmass, injection quantity and EGR stay within the specified values. It is normal after 2 min of idling for the EGR to close with the result of an increase in the airflow and injection value. By increasing the engine speed above 1500rpm for a brief moment the EGR will be activated for 2 min again, check if your values comes down to the specified values, note that these values have a short delay to the EGR operation. The EGR operation reduces the oxygen in the combustion chamber resulting in a lower Nox levels. After cold start do you have white smoke or black smoke when the vehicle is idling until it is warm without revving the engine?
Spakainz

Posts: 3
Registered: 06/07/09
Re: Passat 130 TDI PD injection problem at idle
Posted: Jun 23, 2009 11:53 PM   in response to: Burgermeester in response to: Burgermeester
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Hello, ok I will look at value at cold start, but I think EGR works well. After cold start I have a little white and blue smoke when engine is idling..When engine becomes warm (normal operation temp), there are no smoke...
tditunisia

Posts: 2
Registered: 08/25/13
Re: Passat 130 TDI PD injection problem at idle
Posted: Aug 25, 2013 5:18 PM   in response to: Spakainz in response to: Spakainz
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Hi,
is there any update about your issue.

I'm experiencing the same problem after AVF => AWX engine swap.

Cheers,
Med.
tditunisia

Posts: 2
Registered: 08/25/13
Re: Passat 130 TDI PD injection problem at idle
Posted: Dec 14, 2013 8:01 AM   in response to: Burgermeester in response to: Burgermeester
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Hi,

could any body help me diagnose my extremely poor fuel economy ?
I'am really out of ideas.

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