Audi A4 B8 2.0TDI 120HP CAGC - Fuel Pressure Sensor Signal Too Low // Signal

Hello, I have an Audi A4 B8 2010. 2.0TDI 120KM CAGC

I have such a problem with the revolutions waved within 700-900 so the engine was not even working and it is at idle
while driving, the car performs normally and a little weaker or not it is hard to feel
After connecting the computer with MaxiEcu did not show any error

So I undertook the diagnosis of unplugging the sensors and after unplugging (Fuel Pressure Sensor) on the Common Rail

The engine started to run evenly but louder
And after connecting the computer an error occurred (Fuel pressure sensor on the injection rail signal too high)
So I bought e-katalog.intercars.com.pl/pdf/331920163518
And after replacing the sensor, the engine somehow worked strangely, but the speed was stable
and there was a specific smell like something burning on Poster
Fixed error after plugging in the computer (Fuel pressure sensor on the injection rail signal too low)
When I tried to reach 3,000 revolutions and letting go of gas, a clatter of power as in a diesel (two strokes +/-)
So I turned this sensor off and put on the old one.

I tried to describe it well, I think it worked out somehow
Best regards and waiting for feedback

Sooner the problem will be with the pressure regulator. Perform a controller adaptation reset.

The regulator on the strip, look at the fuel pressure at idle.
Plus a friend's tip above.

sensor only new and only original, check high pressure pump and regulator, search for filings

Could someone approximate me with resetting the pressure regulator adaptation?

I had the same thing in CAHA, the pressure regulating valve on the 057130764H strip was responsible for rocking on free time, replacement for a new one and nothing needs to be adopted.

And after replacing the fuel pressure sensor on the CR strip
no need to reset pressure regulator adaptations?
or if something needs to be done after replacing the Pressure Sensor

What are the procedures for replacing the fuel pressure sensor

Added after 50 [minutes]:

https://www.youtube.com/watch?v=RfNrhpul0Vo
this is how the engine behaves, it's not my recording

Added after 35 [minutes]:

https://forum.nissanklub.pl/topic/87958-t30-22-dci-reset-pompy-po-wymianie-zaworu-scv/

is there something like this in Audi reset adaptation?
or how to do it with VCDS

Added after 13 [minutes]:

I fucked the forum mass on this topic and many people write about this adaptation reset
but nowhere can I find the procedure for this adaptation

Resetting will not repair a damaged valve.

Rafik4 wrote:

Resetting will not repair a damaged valve.

And after replacing the fuel pressure sensor no adaptation is needed?

I do not know, I did not move the sensor, after replacing the valve, it waved for a while and stabilized.

Rafik4 wrote:

I do not know, I did not move the sensor, after replacing the valve, it waved for a while and stabilized.

Well, after the exchange, the revs did not wave, but immediately the error that the pressure was too low and the engine seemed to run on 3 cylinders and a strange specific smell was (if someone started something on the cake, the same smell)
And when gassing something metallic was heard
So I put on an old one and everything is cool, it's just the wave revolutions
Even the error is not old

Then change the valve and it will be fine.

Rafik4 wrote:

Then change the valve and it will be fine.

Changed to old but revolutions and I would like to remove it

You changed the sensor and the valve at the other end of the bar is to blame.

wave revolutions have disappeared only light shack is feasible
I took measurements and the fuel pressure jumps 170-270bar at idle

Up someone something?

Old, no fuel pressure can not jump like this, the acceptable deviation is approximately +/- 10%.

I propose that you carefully check the sensor supply itself fuel pressure (there you have 3 pins, signal in the range of 0.5 - 4.5, 5V power supply and mass) which is which I will not tell you now.

The elements involved in regulating the fuel pressure are the sensor and regulator, what the sensor measures on the strip, the transmission to the ECU, will also verify with what it is supposed to be and so will control the pressure regulator if any of these elements fails (e.g. the valve will seize or it will be dirty) then the pressure will change.

Similar effects can be given by overflow of any of the injections.

Check carefully how the fuel sensor supply looks like.

Oh, two more things:

- in these parameters what you stated above is an open throttle almost 40 percent .. did you keep the gas pressed or not?
- see what voltage supply you have in the system ... in the upper right corner of the tester you have 15.1 V ... quite a lot ... and what does the meter connected to the battery pack show?

M.

For some time he was calm with the wave revolutions but yesterday it came back and today calm again but still feel the vibrations and this dose of fuel jumps +/- 5,000
And yesterday I took something to check and started the car and it works perfectly, but I overcooked it a little up to 2/3 thousand I gave up and the shaking of the shack returned without wave revolutions.

I have no idea: /
In December I am coming back to Poland and I will exchange a fuel pressure regulator and see what will happen

If someone has an idea to give info

And what, did you fix the problem?

Hi, I have a similar problem with the leaping fuel pressure and gentle vibration at idle in CAHA. I replaced the common rail adjustment valve, but I didn't carry out any calibrations. I will look into the valve at the pump. Are there any adaptation procedures that I might have missed?

Did anything move about Damian?

Hello colleagues.
I also have a problem with the CAHA 2.0tdi engine.
I replaced the pressure sensor in Lithuania CR, but it did not help, so I replaced it, because when I unplugged it, the car started to work evenly, but it caused an error.
After cutting off the pressure control valve on the rail, the car immediately goes out, and after cutting the plug from the regulator on the pump, it has no effects, except that a regulator error on the high pressure pump is triggered.
Help, which valve is broken?
MCZ007 did you solve the problem at home?
What was the reason?

Maybe write what is your problem, revolve at low speed? How does the pressure on the slat work at idle?

Swing at idle revolutions, as if revolutions dropped and returned to normal revolutions. Vcds I checked it jumps pressure.

Valve on the rail.

Can you check it somehow?

Added after 2 [hours] 35 [minutes]:

Strange that there is no error ? and is it possible that the reason was bad fuel? And it is even more so to smell such a specific smell of exhaust fumes, but it seems to me that this is the norm for dpf

Over time, there will be a pressure regulation error, I did it.

Oki, thanks to whom I will look, and you don't know how much a valve can cost?

About 500 PLN.

Hello,
I have a similar problem. Although the revs do not go crazy as in the movie.
It is the pressure on the bar that jumps. An additional symptom are relatively high corrections in injections.
It can show even around 1.7, but when I add gas and let it go, corrections from the 1st cylinder go to 4 or vice versa.
I wonder if it could be just a pressure regulator on the bar or maybe a dose valve on the pump?
At elevated revolutions, correction on exemplary injections, no swarf pump.

levy_21 wrote:

Hello,
I have a similar problem. Although the revs do not go crazy as in the movie.
It is the pressure on the bar that jumps. An additional symptom are relatively high corrections in injections.
It can show even around 1.7, but when I add gas and let it go, corrections from the 1st cylinder go to 4 or vice versa.
I wonder if it could be just a pressure regulator on the bar or maybe a dose valve on the pump?
At elevated revolutions, correction on exemplary injections, no swarf pump.

The regulator on the strip.