Audi 2.0TDI CR - Leaping fuel pressure, uneven operation, error P2196

Hello, I have two problems with the 2.0 TDI CR CAGB engine, so I am wrong:
5120 - Oxygen (Lambda) Sensor B1 S1
P2196 00 [237] - Signal too High (Rich)
After erasing and doing about 300km the error returns, the second problem is uneven idling, shakes the engine and you can hear a two-mass wheel. I started to diagnose the fuel system, there are no filings on the CR pump in the strainer. Fuel pressure on the bar at idling very strange jumps, from 190 bars to 320, the engine shakes two-mass. The mechanic said that you need to replace the bimass because through it rages the parking dose and pressure because the computer tries to adjust the uneven rotation of the engine. It can be like that? I am afraid that I will replace the clutch and the symptoms will remain. On vcds it looks like this:

I have also made dynamic logs, fuel pressure in the entire rev range, probably good, turbo and the rest also look ok:

I also made an overflow test for injections:


You can see that the 2 injections are weak, maybe it crashes oxygen error with info about a rich dose. I am concerned about the idling fuel pressure, can it be the culprit two years or injection? or maybe a valve? Does the overflow test give 100% confidence that the injection is for replacement? What do you recommend to me, where to start? Injections correction are very floating, once on injection is a dose of even -2mg and in a moment can change to + 1mg, and so on almost all injections are changing

Give all the injections to a decent regeneration ....

I had the same symptoms, speed and idle fuel pressure, I changed the valve (there is also a pressure sensor on the rail) on the CR rail and everything went back to normal, only in me there was a fuel pressure error, I do not remember the code anymore. I paid 550 zlotys for a new valve, half an hour of work.

Rafik4 wrote:

I replaced the valve (there is also a pressure sensor on the strip) on the CR strip

Which valve did you replace on the slat? because there are probably two, at both ends of the slat, the closer to the timing or from the bulkhead? If I go to a friend who has the same engine, can I replace this valve from him? some disposable pads etc are on it?

The N276 valve is on the back of the CR bar, closer to the engine bulkhead. There is a washer on the valve that crushes, one off but people are trading used valves, so your risk. It's better to replace the entire bar. I read about the adaptation of this valve after the assembly but in the end I did not find how to do it, after the firing, it was momentarily rocked and calmed down.

CR pump for blockade set?

daras41 wrote:

CR pump for blockade set?

I adjusted the camshaft because I had on -3.5, the previous car owner changed the clock in December and set it up, I did not adjust the CR pump but I noticed that the beans are moved right to the max left, somewhere I read that cr pumps do not have to ideally set, maybe have meaning? You gave me some food for thought now, now that I have a roller shaft with a shaft under vcds set to almost zero, just put the lock on the camshaft then loosen the screw on the cr and set it on the lock?

The pump must be set to locks and this is important. The setting compensates for the pressure pulsing on the bar. It's best to dismantle the timing and make it lock, as God ordered

Tomorrow I have time and I will check the exact setting of the cr pump, I will also have a new valve, let me know if the fuel pressure has stabilized. I am also worried about whether the two-quarters have a slack and disrupts the engine's work on idle fuel pressure can jump so much? The mechanic assured me that it's the fault of twelve, the fuel pressure on the idle should probably be stable all the time

Subject gripped, the culprit was the pressure regulation valve on the cr bar, after replacing the pressure at idle speed calmed down, the engine does not shake, you can not hear the bumps twelve, and the mechanic wanted to stretch me on the clutch, massacre. After replacing the valve, the error for a rich dose of fuel continued to pop out once in a while. After checking the injections, I exchanged 2pcs for new ones, which were no longer there, the errors are gone, the car is perfect. Thank you for all the help and guidance, if not for this forum, I would probably begin by replacing the bimonthly as the mechanic recommended