Fuel pressure problem.
https://wiki.ross-tech.com/wiki/index.php/18725/P2293/008851Do you have VCDS or anything that can monitor the fuel pressures?
Checking Fuel Pressure
Prerequisites:
Ignition ON
Engine ON (Idle)
System voltage at least 11.0 V.
Coolant Temperature at least 80 °C
[Select]
[01 - Engine]
[Meas. Blocks - 08]
Group 103
[Go!]
Field 1: Fuel Pressure (Low), Specification: 2800...7200 mbar
Field 2: Fuel Pump Adaptation, Specification: -1000...+1000 %
Note:
Timing chain driven engines such as the CCTA, CBFA and CCTA were phased in during model year 2008. Those engines do not use a G410 (Low) Fuel Pressure Sensor so Measuring Blocks group 103 is not applicable.
Group 106
[Go!]
Field 2: Fuel Rail,Pressure (actual): (A value ≈ 35 to 55% is considered normal at idle)
A value ≈ 55% to 60% could be considered as an indication of a low fuel pressure concern
A value above ≈ 60% to 70% usually indicates there is a failure or restriction
A value fluctuating ≈ 35% to 95% may indicate an intake fuel pump failing
Causes of low pressure can include:
Damaged/restricted fuel lines
Fuel filter issues including restricted/clogged or incorrect part number (wrong pressure relief value)
Faulty in-tank fuel pump and/or in-tank fuel pump controller. (With critical parts, we encourage customers to use Genuine Factory parts from the dealer's parts department.).
Group 140
[Go!]
Field 3: Fuel Rail Pressure (High), Specification: 25.0...110.0 bar
Increase the Engine Speed while checking this value, the Pressure has to rise with the Engine Speed.
Group 230
[Go!]
Field 1: Specified Fuel Rail Pressure (High)
Field 2: Actual Fuel Rail Pressure (High), Specification: 25.0...110.0 bar
Field 3: Deviation between specified and actual fuel pressure, Specification: max. 5.0 bar
This video may be helpful:
[Done, Go Back]
[Close Controller, Go Back - 06]
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