Symptoms
• Power loss• Engine Judder at idle speed
• Fluctuating idle speed
• Black exhaust smoke
• Engine control unit:
• No fault codes are Displayed
Cause
• Camshaft:• Excessive wear
• Damaged hydraulic tappets
Solutions
• 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:
• 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
This post first appeared on Blog Of Car Workshop- United Kingdom, please read the originial post: here
