fault finding help

[herb]

i got my liquid gauge back today and i ran the diagnostics and it came up with 2 codes

17545 - Fuel Trim: Bank 1 (Add): System too Rich

Possible Symptoms

• Malfunction Indicator Light (MIL) active

Possible Causes

• Mass Air Flow (MAF) Sensor faulty
• Fuel Pressure Regulator faulty
• Fuel Injector(s) faulty
• Oxygen Sensor Control faulty
  • Oxygen Sensor(s) faulty
• Evaporative Emission (EVAP) System faulty

Possible Solutions

• Check Mass Air Flow (MAF) Sensor
• Check Fuel Pressure Regulator
• Check Fuel Injector(s)
• Check Oxygen Sensor Control
  • Check Oxygen Sensor(s)
• Check Evaporative Emission (EVAP) System

and

17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)

Possible Symptoms

• Power Loss

Possible Causes

• Leaking hoses and/or pipes between components
• Check Boost Pressure Control Valve (N249)

Possible Solutions

• Check hoses and/or pipes between components
• Check / Replace Boost Pressure Control Valve (N249)
• Check / clean Throttle Valve, do Throttle Body Alignment

with the fault code 17545 i know how to check if the maf is faulty but how do i test the other components?

and with the code 17705 this 1 really cabbages me cause only last week i tested the dv and checked all the boost pipes over and found no splits/holes or loose jubilee clips
i used to get this fault code regularly but this stopped when i changed to the forge tip but its back again
also any ideas how to test the n259 valve? i know there is a bypass that can be done but if i dont fancy doing that


any help and tips are really appreciated!!!:bigsmile:

 

[obi_waynne]

Were the codes all cleared and reset before you got this? Sometime you get old codes flagged up.

Do you have a partially venting DV or is it a closed diverter?

For the first fault I would be tempted to run some injector cleaner through the system and see if this clears it up. Also clean the air filter out to make sure it is getting enough air.

Some good info here on lambda sensor testing.

 

[pgarner]

would loo towards a split vac pipe causing it to run rich might also be the problem with the DV.

 

[pgarner]

think you can test the n249 in vagcom

 

[herb]

well i think i found the leak and i dont know how i missed it last week:embarrest:



so i have done a temporary bodge to see if there are any more leaks


cheers for the input lads!!
i wouldnt have even bothered checking the pipe work again if pgarner hadnt suggested it so a speacial thanks to you mate and i hope this is the end of my lack of power

 

[pgarner]

glad to help mate