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Author Topic: Omega 2.6 runs better without MAF  (Read 1550 times)

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olm

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Re: Omega 2.6 runs better without MAF
« Reply #30 on: 16 June 2019, 21:43:39 »

I'll ask one more time before ignoring this thread.

Post up the live data readings for LTFTs and MAF

The LTFT of bank 2 is 25%, bank 1 around 14%. Sorry but I do not remember the values ​​of the MAF. Anyway, I'll try to look at them tomorrow, could you tell me what values  have to give at different rpm or speed?
Also say that the injection times are irregular, typical air intake, but for more than looking I do not see it
« Last Edit: 16 June 2019, 21:46:20 by olm »
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TheBoy

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Re: Omega 2.6 runs better without MAF
« Reply #31 on: 17 June 2019, 17:40:17 »

could you tell me what values  have to give at different rpm or speed?
Report the figure at idle, AC off.
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olm

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Re: Omega 2.6 runs better without MAF
« Reply #32 on: 20 June 2019, 10:26:03 »

Well, these are the logs at 120 km/h






In order, LTFT bank 1-2 and STFT 1-2.
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Re: Omega 2.6 runs better without MAF
« Reply #33 on: 20 June 2019, 17:33:14 »

I wonder why I suggested idle ;). Nothing to do with the fact that we don't know engine load when moving ;)
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olm

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Re: Omega 2.6 runs better without MAF
« Reply #34 on: 20 June 2019, 19:05:09 »

I wonder why I suggested idle ;). Nothing to do with the fact that we don't know engine load when moving ;)

The load have it down on the riht
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Re: Omega 2.6 runs better without MAF
« Reply #35 on: 20 June 2019, 19:31:21 »

To save TBs bath water... The readings MUST BE TAKEN AT IDLE :y
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olm

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Re: Omega 2.6 runs better without MAF
« Reply #36 on: 20 June 2019, 20:51:26 »

To save TBs bath water... The readings MUST BE TAKEN AT IDLE :y

But at idle the maf can run ok while on hihgway wrong. Nevertheless tomorrow I do readings at idle
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olm

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Re: Omega 2.6 runs better without MAF
« Reply #37 on: 14 July 2019, 11:58:21 »

Well, after some good LTFT data after changing lambda sensors yesterday it came back on check engine light for p0170 and p0173. These are the values ​​that it gives me





The probes are new, spark plugs, revised air intakes, I've even tried a new MAF sensor, I do not know what else to look. Why does the LTFT go to 25% if the STFT works well?
« Last Edit: 14 July 2019, 12:00:03 by olm »
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Re: Omega 2.6 runs better without MAF
« Reply #38 on: 14 July 2019, 16:31:09 »

It helps if you stop changing shit randomly.

So, assuming I'm reading your graph right, LTFT for Bank1 is 4%, and Bank2 is 25%? Is that at idle, following a reset - might take 20mins to creep that far.


If so, thats suggesting lean running on Bank1, so its correcting by adding more fuel (but hard to tell with your diagnosis kit).  That lean running points to additional air getting in (airleak, some prat adjusting the throttle butterflies etc), or insufficient fuel (injector).
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Re: Omega 2.6 runs better without MAF
« Reply #39 on: 14 July 2019, 17:14:56 »

It helps if you stop changing shit randomly.

So, assuming I'm reading your graph right, LTFT for Bank1 is 4%, and Bank2 is 25%? Is that at idle, following a reset - might take 20mins to creep that far.


If so, thats suggesting lean running on Bank1, so its correcting by adding more fuel (but hard to tell with your diagnosis kit).  That lean running points to additional air getting in (airleak, some prat adjusting the throttle butterflies etc), or insufficient fuel (injector).

Yes, LTFT is 4% bank1 and 25%bank2. The values ​​are maintained from the reset at the most time. I have checked vacuum lines and even rings fron intake manifold. I will run longer on gasoline but the problem persists in both petrol and glp.
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Re: Omega 2.6 runs better without MAF
« Reply #40 on: 14 July 2019, 17:27:15 »

Injector loom wiring fault :-\
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Re: Omega 2.6 runs better without MAF
« Reply #41 on: 14 July 2019, 18:19:53 »

Injector loom wiring fault :-\

And would not something strange be noticed in the driving? The car runs perfectly fine
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Re: Omega 2.6 runs better without MAF
« Reply #42 on: 15 July 2019, 10:39:18 »

Injector loom wiring fault :-\

And would not something strange be noticed in the driving? The car runs perfectly fine
Assuming its running on 6 still, anything up to +/- 25% LTFT the ECU can compensate for. But its shows there is an issue. On a petrol car with no LPG, it LTFT for both banks isn't 0% you have an issue.

And exhaust leak can also cause drifts, so don't rule that out either.
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olm

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Re: Omega 2.6 runs better without MAF
« Reply #43 on: 21 July 2019, 12:12:47 »

Injector loom wiring fault :-\

And would not something strange be noticed in the driving? The car runs perfectly fine
Assuming its running on 6 still, anything up to +/- 25% LTFT the ECU can compensate for. But its shows there is an issue. On a petrol car with no LPG, it LTFT for both banks isn't 0% you have an issue.

And exhaust leak can also cause drifts, so don't rule that out either.

Thanks!
now I can not put photos, but I tell you results. With petrol LTFT bank 1 is 0%, bank 2 0,78%. STFT is around +-3%. In LPG is the problem, LTFT bank 1 is around 8% and bank 2 go to 25% and turn the check light, STFT is +-3% too

What I do not understand is that if the STFT value is correct, why the LTFT goes to +25%, what explanation does he have? Logically I will tell my LPG installer, but I would like to know what can be done
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Re: Omega 2.6 runs better without MAF
« Reply #44 on: 21 July 2019, 12:55:33 »

Ignore STFT values.

So, on petrol, LTFT remains at 0% on both banks? But drifts on LPG (or similar)?  That shows the fuelling on the lpg is out.  If its a piggybank ECU, it probably just needs the map adjusted *AFTER* you have checked the filters and injectors.  If its a mixer system, then you'll always be chasing your arse I'm afraid.
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I don't tolerate bickering, and I'm always grumpy.
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