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Monday, July 24, 2017

Power loss; Engine judder at idle speed; Fluctuati ... (Passat V (3C) 1.9 TDi DPF (BLS) 2006 - 2009) (post nr 17-002)


• Power loss
• Engine judder at idle speed
• Fluctuating idle speed
• Black exhaust smoke
• Engine control unit:
• No fault codes are displayed   


• Camshaft:
   • Excessive wear
   • Damaged hydraulic tappets


• Connect the diagnostic tool
• Check the EGR valve dwell readings
• Check the mass airfl ow meter parameters

 Expected value:  1200 mg/H
 If the displayed value is: 700 mg/H

• Check the turbocharger pressure
Expected value: 2300 mbar

If the displayed value is: 1950 mbar

• Check the fuel injection correction values
Expected value:  < 1 ml 

• Cylinder 3
If the displayed value is: > 1 ml

• Swap the injectors from cylinders 1 and 3
• Adjust the injector pressure
• Check the fuel injection correction values
• If one or more symptoms are still present
• Remove the camshaft cover
• Check the camshaft for wear
• Use a dial gauge

• Inlet: 
Expected value: ≥ 61.7 mm 

• Exhaust:
Expected value: ≥ 61.7 mm 

• Unit injector camshaft:
Expected value: ≥ 40.5 mm

• Check the hydraulic tappets

If damage or wear is found renew or repair any damaged components.

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1 comment:

  1. Wow, such a wonderful overview of our vehicle engine system, as a vehicle owner, we never before do some kind of experiment with our vehicle's engine. Whenever we are facing trouble, we must consider professional mechanics. But here this article describes some important facts about engine and power loss system. Thanks for such a wonderful presentation.
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