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Update: I proceeded with new injectors as well as a HPFP upgrade. PROBLEM RESOLVED! The car is out of limp mode and turbo spools good BUT there are a few other codes still in effect and I will get back tomorrow with the codes received.

It appeared while trying to diognose the fuel pressure not from the start. I was just wondering because when I looked up the probable causes it said it could be a faulty or leaky injector

Okay I will run those tests soon. Also I have a code "P0420 Catalyst System Efficiency Below Threshold Bank 1". Does that help pin pointing anything

I have not tested the rail pressure yet so I will do that. As for the tri-lobe, how do you determine if it is worn or not because when I took a look at mine it had some surface marks but it looked like nothing significant enough to cause a problem.

Also camshaft if good And new cam follower

So I have a 2006 GTI and just bought the car thinking it was going to be an easy fix. I have the code P2293 stored for fuel pressure and started guessing and replacing parts. I've replaced the low-pressure fuel pump, the fuel filter/regulator, fuel lines, and the high-pressure fuel pump, and no...