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Old 03-11-2016   #16
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Re: Slow mod ?

Hey

I'll try this weekend, I don't have laptop, but gf does

So basically you want

%EGR Opening
Desired EGR Position
Actual EGR Position
Intake Air Quantity
Desired Intake Air Quantity

Can't easily do videos but I'll record the graph, I think I read somewhere there is something happening with EGR after 70sec, tho can't remember what exactly

So first thing, start the car, record for 2-3m without any gear on ?
Then the same once engine is hot but still idling ?
Or should I also accelerate and see if it changed anything with EGR while no gear on ? (and in that case add rpm to the recording to see if it affects)
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Old 03-11-2016   #17
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Re: Slow mod ?

Ok, that's what i want. Everythings on idle from cold start and then with hot engine withput gear on. Additionaly accelerate from 1500rpm to 3500rpm with these parameters. I will do this too and compare the results.
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Old 04-11-2016   #18
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Re: Slow mod ?

Hi,
One more thing. Sometimes i have maybe 70% of power in cold or hot engine. Yout results maybe can resolve my problem. After 30 sec on idle egr desired is -40mm and actual near 0 or -0.1mm. I dont know if this is ok or not.
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Old 04-11-2016   #19
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Re: Slow mod ?

Hmm, looking back at my recording and what you say, I'm wondering, can it really achieve a negative position ?

1
2


And if it can't, do I really have any problem with my EGR ?
If we look, we can see it only close to 0mm, and seems to open more or less correctly when wanted, just it never goes below 0, but that doesn't sound abnormal thinking about it

I'll try do to your recording and clean my EGR this weekend if I get the time and weather allow it...
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Old 04-11-2016   #20
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Re: Slow mod ?

I can see that yout egr is opening to minus values when driving.
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Old 04-11-2016   #21
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Re: Slow mod ?

Don't you think it's a missreading ?


It never stays at that -0.4, does yours do ?
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Old 04-11-2016   #22
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Re: Slow mod ?

Quote Originally Posted by Evo63 View Post
Don't you think it's a missreading ?


It never stays at that -0.4, does yours do ?
Note that the values you are looking at are only the COMMANDED opening values. There is no feedback of the EGR valve position so it may not be opening or closing to the commanded position. The value only tells you what the ECU want's the valve to do, not what the valve is actually doing so don't put too much trust in it when diagnosing a possible faulty or stuck valve.


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Old 04-11-2016   #23
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Re: Slow mod ?

Then, why is there an actual and desired position ?

Desired = what the ECU wants
Actual = where does the number come from ?

Anyway thanks for input, I just removed the part I removed last and now trying to access egr
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Old 04-11-2016   #24
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Re: Slow mod ?

Quote Originally Posted by Evo63 View Post
Then, why is there an actual and desired position ?

Desired = what the ECU wants
Actual = where does the number come from ?

Anyway thanks for input, I just removed the part I removed last and now trying to access egr
Good question, it may be a calculated value from MAF and other sensors. When I get a minute I'll simulate your car in MES and try to get to the bottom of it. I do know that there is no direct feedback of position.


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Old 04-11-2016   #25
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Re: Slow mod ?

Egr has sensor which is calculate his open position. So desired that what ecu want and actual that what is in real excactly the same like with MAF with air quantity.
Evo63 pls my friend tell that if your actual egr position is changing fast in idle? Like from 0,85 to 0,50 and back. You know what i mean?
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Old 04-11-2016   #26
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Re: Slow mod ?

Can you please tell me if the EGR is that part ?




I'm afraid I made a mistake, I unscrewed a little but something leaked. Oil I suppose

Wasn't prepared for this and now public pavement will stay dirty :x
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Last edited by Evo63; 04-11-2016 at 13:04.
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Old 04-11-2016   #27
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Re: Slow mod ?

Yeap it is with orange plug. If you unscrew this not only oil goes out but coolant too
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Old 04-11-2016   #28
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Re: Slow mod ?

So I have to refill both after before running the car ?

Or is it some already lost stuff that went with air going out ?

Sorry i'm really new to all this..

Anyway I'll remove it and clean
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Old 04-11-2016   #29
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Re: Slow mod ?

When mechanic changing egr in my punto 2y ago he said that all coolant will fall off. So u need to be careful. Take pics
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Old 04-11-2016   #30
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Slow mod ?

Could you save boost control too in mes?
One more important thing - DPF. Can u give us data about it? Average 5 last regen km, temps. How much you are driving in town?
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Last edited by puntoevodiesel; 04-11-2016 at 13:55.
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