SEAT IBIZA IV 1.6 TDI - It goes out while driving and does not light

Hello,

please help because my ibiza (1.6tdi 105km 2010) drives me crazy. There are many similar topics but none
does not describe my case. Well, it starts without any problems, the engine runs smoothly without any strange phenomena.
The problem appears after a few kilometers (sometimes 5 and sometimes 15 km) - it starts going sluggish as if it is not getting fuel until it goes out.
Then it does not go off for about 10 minutes - the starter is spinning (the spiral heats up and goes out) but does not light. Sometimes it will catch a moment and go out right away
only after 10 minutes it lights up as if nothing had happened and I can go on ... It doesn't always happen. There is no rule for this.
Has anyone had a similar problem?

PS. fuel filter replaced (nothing), the fuel pump is heard after turning the key (relay 53 turns it on and disconnects from what I observed)

PS2. when I changed the fuel filter and wanted to fill it by turning the key and turning it off quickly, it was not possible because the fuel flies there in a droplet ..
Shouldn't there be more pressure from the pump hose, more fuel?

And diagnostics?

On Monday I will get a mini vaga and give me the mistakes. I understand that it's hard without it, that's why I write with the hope that someone had a similar case.
We are waiting until Monday then.

I've had a lot of such cases. Everyone was different

Ok, I have errors:
1. P228C00 - Fuel regulator 1 is outside the control limit: Pressure too low-short circuit to positive
2. P00C600 - Fuel rail pressure is too low-Engine crankshaft-short circuit to ground
3. P008700 - Fuel rail / system pressure-Too low-No communication signal

I would like to add that sometimes the revolutions are waving at higher revolutions than idle, i.e. it gas to e.g. 1500rpm and I keep the gas in this position and the revs drop down about 200 rpm for a while and go back to 1500
over and over again.

I hope that something concrete can be read from it Thanks in advance for your help!

In googles they say that it can be a pressure control valve on the pump, just how to check it to be sure.
PS. I have a VAG Mini, I can probably do some more measurements, just guide me so that I do not break anything; d

When it goes off, check when turning what pressure the pump creates on the "rail".

What to check?
Is it possible to VAG somehow in measuring blocks? Do you need to connect a pressure gauge?

This is how you can check it with a Vag.

Do you know what channel in measurements? Need to block something at the pump?

I heard that to check the pump quickly, I can unscrew the regulator from it and see if there are filings? This is true?


Ps. I noticed that when it is hot, it is uneven at idle.

If you have VCDS then you have everything described in extended measurements there.

I have a pressure measurement on the rail when the engine is running. Relaxed.
- There is a pressure of 24,000 kPa at idle speed around 800-100rpm
- 1500rpm revolutions -> pressure 34000 kPa
- revolutions 2000rpm -> pressure 42000 kPa
-rotation 2500rpm -> pressure 57000 kPa.

For now, I do not have a measurement of what the pressure is like when it goes out, but I will. Are the pressures I gave normal?

I have accurate data in EXCEL from the time it went out while driving and trying to start it.
file in attachment ibizaCisni..ie.xlsx Download (35.25 kB)

It seems that when I fire after self-extinguishing, the pressure is close to zero. What does it mean?

CR pressure regulating valve.

I suspected so too. I will replace the valve and let you know if it helped.
Thanks for the quick reply, I can order a part today.

In 1.6, the high pressure pump was able to run 60,000 km.
Check that there are no filings on the regulator in the rail.

Where is this regulator? I checked the strip, there are only 2 sensors at the beginning and at the end and the regulator is on the CR pump.
Does anyone know if it can be unscrewed without removing the entire pump? because there is little space. picture: ibizaRegu..or.jpg Download (1.63 MB)


When it comes to the accident, some small cullet, I suspect it was and where did you conclude it or what about it?
The problem appeared after about 2 weeks when I bought it, also at the beginning it was ok.

Of course you can. Two hex keys (5 or 6) and that's it.

I checked the fuel pump basket and all. Voltage gives 12V for a moment when ignition is also ok.

I have a question about this valve that I should replace. The one on the rail or the pump? How are they different?
Does the 1.6 tdi 77kw 2010 wgl have a regulator on the strip or are they some sensors? Someone knows. I bought this valve on the CR pump and will replace it on Monday.



Edit.
Replacing the fuel control valve on the CR pump did not help. Follow the same symptoms. Possibly, this regulator remains on the strip.
In the meantime, I asked the mechanic and he says that my symptoms are similar to a damaged shaft position sensor. But I don't agree with errors ..