Opel Astra H 1.4 - Problems with a bad mixture (Lambda probe ??)

Hello all. For a few days I have been struggling with LPG in my Astra H 1.4 90km (not serial LPG) with the problem of jerking, pitting and other such strange behaviors of my engine (hole about 3000 rpm). After connecting to OBD II, the following errors occur:
First configuration:
P0170 Fuel Trim,
Second:
P0130 O2 Sensor Circuit
Third:
P0304 Cylinder 4 Misfire Detected,
Fourth:
P0303 Cylinder 3 Misfire Detected,
Fifth:
P0304 Cylinder 4 Misfire Detected,
P0170 Fuel Trim,
Sixth:
P0303 Cylinder 3 Misfire Detected,
P0130 O2 Sensor Circuit
P0170 Fuel Trim,

The most common occurrences are P0170, then P0130, and the rest in total one time.


Lambda:

Lambda probe voltage indications are no less strange than "error configurations"
Lambda 1:










Probe 2 behind the angle:





The above measurements are made at idle speed, after adding the gas suddenly, little changes in total, in 90% the indications from Probe 1 oscillate between 0.00-0.45 max.

So I don't understand anything about it anymore, as if it worked well and sometimes bad, most measurements of probe 1 (before the angle) show the lower range of the probe (0.00-0.35) so I checked the tightness of the intake system using the "Plak" method. Well, it turned out that the intake is ok.
Of course, I measured the probe with a meter (heater resistance, voltage applied to the heater, voltage on the signal wires from the controller side is about 0.45V, if I remember correctly, the voltage on the wires from the sensor side also shows and waves in a range similar to the ELM indications.

Honestly, I am slowly trying to replace this probe (which is not a difficult activity because it is trouble-free, you only know "many mana". I hope that I have described everything I did, if I forgot something, I will add in the posts. Maybe you have any ideas what maybe be the cause of this crash?

And try to drive to someone who has a better interface than those ELEMs for Bluetooth that refresh data about once a second and a terribly poor database of errors. You can check the EGR on your own.

I will just add that the fuel consumption has increased and it is a lot because by about 3l / 100 km, As for EGR, I checked it by removing the plug from it and the valve moves, i.e. when the plug is pulled out, it moves, after inserting it returns to its place (engine on) I do not know how else I can check the electronic EGR? because it probably is there.

I was more concerned with checking whether it is littered with muck or is not closing properly. Fuel corrections he shows you?

I don't know if I missed something, but ... what fuel do you have problems with on gas or petrol?

Yes, stupid me.
Problems with LPG and gasoline as well, although gasoline is better than LPG.

That is, errors pop up less frequently on gasoline.

Well, drive for two weeks only on gas until everything calms down (it is also worth disconnecting the battery for a while), then without switching to gas, go to mapping to gas sellers ...
I don't even write about putting it for repair ...

bubu1769 wrote:

I was more concerned with checking whether it is littered with muck or is not closing properly. Fuel corrections he shows you?

As for the fuel adjustments, I hope you meant:

1. STFT - idle:

This chart starts after firing from 0% and for a moment remains at 0, then it systematically increases to the level of 25% and remains so until the gas is gassed, after gassing it drops to zero (with a decrease in turnover) and then it systematically increases again to the level of 25%.

2. STFT - while driving:


3. LTFT - when stationary and driving:



Honestly, I have never dealt with this before, I will not interpret these charts in any way, so I am asking for opinions and help. I sooner had a straight golf with an AFT engine. I have had Astre for 3 months and I did 21000km with it during this time and only replaced the coil and of course the oils, etc. (I drive so much and I'm not surprised that something is falling)


Ps. Measurements made on gasoline

Added after 8 [hours] 32 [minutes]:

I disconnected the battery for about 30 minutes, after connecting it, I entered OBD II and in STFT and LTFT the indications showed:
STFT 25%,
LTFT 0%
I drove a little (about 15km) and while driving STFT still at 25% and LTFT at 0% (while driving), then I went around 180km and noticed a change, namely:
STFT still at 25%,
while
LTFT began to show some variable parameters while driving, i.e .:
from 0.00 to even 18 more or less from what I remember.

I am curious because before disconnecting the STFT it changed the values while driving and the LTFT kept one value, now after the "reset" by disconnecting the battery, the STFT stands rigidly while driving at 25%, while the LTFT started to "float" I don't know if I understand it correctly, and if I'm wrong then please correct me:

1 If lambda gives a signal that the fuel mixture is too lean, as in my case, the STFT "tends" to 25% to stabilize the mixture by "increasing" the dose of fuel (and thus more fuel), while LTFT extracts some constants from STFT to machine set the mixture ???? understand it well? did I mess up too much?

And now my question is, after disconnecting the battery, the LTFT settings have deleted me and now it must sort of collect a new map or something like that?

Normally, the manufacturer did not foresee such a situation as disconnecting the battery to delete adaptation, it is normally done with a computer, but I also do not remember how your controller reacts ... in some of them there is deletion of probe maps, knock map or BLM block ... well, you would have to connect for interface ...

Because now I think so ...

I think on Sunday, 02/04/2017 I had a battery (UNLESS it was then that my adventure with these errors began), i.e. I did not even turn off the starter or some relay was doing a "snap snap" - simply put.

So theoretically, the voltage dropped below 12v. So if all the maps you are talking about were deleted in my controller, then maybe nothing broke, only the controller is "stupid" because it has been driving on gas all the time since Sunday, without having petrol maps?

And as for all these "maps", and in particular to the LFTF, the same thing will happen when driving on gas for some time, do you have to upload it via the interface?

So let's go further with this topic, of course it cannot be colorful, so today is another adventure with probes. Namely, I did as he wrote: autoas about disconnecting the battery and driving on gasoline, I did about 350 km, then I turn on the program and it pops up:

P0136 - I enter the voltage of probe 2, the values jump from about 0.2 to exactly 1.08, i.e. they go beyond the range of the probe for an angle. Clears the error, about 10 km is ok and somehow I turn on the program and it pops up:

P0141 - I'm entering the program, the voltage values are reasonable (interestingly, probe No.1 started to work in MIARE in the normal way, namely from 0.05V (which is not normal, I think) to about 0.6V but it is satisfactory because the parameters that it showed were repeatable which soon did not happen.Of course, I deleted the error, but after some time P0136 appeared again, I deleted it and again P0141 and so over and over again (not always once this time, sometimes the same error twice in a row).

Yes, I know, it is best to put the car to a mechanic, etc., etc. But the thing is that it is for me ............ and I am such that I like to deal with such things alone (greater satisfaction that I did something myself) . So the questions:

Assuming that probe No. 2 is operational according to the measure (yes, I haven't traversed it yet, most likely I'll do it tomorrow, but I'm curious what other options may be)

1) Can the catalyst be clogged with this assumption? 165000 km traveled and probably years since the news, (I think that when it comes to P0136, yes, but when it comes to P0141, it probably has nothing to do because it is a heater, so either resistance (no connection on the heater) or the wiring sometimes shorted to ground or also sometimes interrupted because if it was interrupted / shorted all the time, the error would be triggered immediately, not after about 5-10 km)

2) Could the leakage in the exhaust before probe 2 be the cause of these errors?

3) Could the leak in the exhaust after probe 2 be the cause of these errors? (it probably has nothing to do?)

3) What else could be causing these errors?

Well, these two errors concern the second probe ... it is damaged .... probably the catalyst too

Buddy, did you deal with this problem? because I have a practically identical one, I have been fighting with him for a long time and I cannot cope with it ..

The kata was as clean as a tear, I replaced two probes and it worked well (probes maxg ....) so I did not expect much, but I paid 180 PLN for one and not 400 (I was not sure if it was a probe, so I bought a replacement), I replaced two prophylactically There are no errors, from time to time P170 (on LPG) will appear, but it does not affect the economy or dynamics of the engine. Of course, I first checked the entire exhaust, intake, MAF sensor (gives me an average of about 3 something / s), of course, I traveled the probes, replaced the candles and finally replaced the probes and flies