error code 00550 boost issue

[4udi]

hi to all i am geeting error code 00550 start of injection control timing problem is i want to know if this has anything to do with boost issues i.e struggling uphill wont go over 3000 revs last weekend i didn't drive the car from sat evening through to monday afternoon and for some strange reason i had all power back no juddering topped 100 mph (just for a test) until today its back to its old tricks again maf is ok as it was tested thanks

[ini]

The fault code has no relation to boost pressure.

On a TDI it means the car cannot adjust the fuel injection timing properly.

The main cause would be incorrect static fuel pump timing, followed by 'injector 3'/needle lift sensor or a problem with its connector, or a 'start of injection' N108 pump problem.

Dirt or air in the fuel lines could also cause this fault code.

[4udi]

thanks would that make the car go into limp mode and the injector nozzle 3 has been replaced also could i check the pump timing through vagcom thanks

[ini]

If injector 3 'G80' is not working correctly you will enter reduced fueling, no boost 'emergency running' / 'limp mode'.

The 'start of injection' is calculated by using the time difference between injector 3 'G80' and the engine speed sensor 'G28', and comparing this to an ECU map. Including measurements from the coolant temp sensor 'G62' allows the ECU to calculate the correct fuel mass, and regulate the start of injection valve N108 on the pump.

I would check the connector and wiring on injector 3 first.

Also ensure your fuel filter is not prehistoric.

You can check the pump timing with vagcom.