1998 galaxy/sharan 1.9tdi egr config

   #21  

Uwe

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the ECU is telling the MAF to open just 40%
A MAF doesn't open or close. It only measures. Fix whatever is causing your fault codes, especially this one:

00553 - Mass Air Flow Sensor (G70)
31-10 - Open or Short to Ground - Intermittent

Research the others. I expect you will find most of them in our Wiki. An EGR adaptation will not help you if your EGR already has a blanking plate.

-Uwe-
 
   #22  

KAISER GARAGE PT

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A MAF doesn't open or close. It only measures. Fix whatever is causing your fault codes, especially this one:

00553 - Mass Air Flow Sensor (G70)
31-10 - Open or Short to Ground - Intermittent

Research the others. I expect you will find most of them in our Wiki. An EGR adaptation will not help you if your EGR already has a blanking plate.

-Uwe-
It measures indeed.
A mass (air) flow sensor (MAF) is a sensor used to determine the mass flow rate of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine.

I do want to reprogram the ECU. is this possible via VCDS?
 
   #23  

Uwe

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The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine.
That's how a gasoline engine works, but that's not how a diesel engine works.

I do want to reprogram the ECU. is this possible via VCDS?
No. VCDS is a diagnostic tool, not a tuning tool. In fact, I do not think your ECU can be flashed. If I remember correctly, your ECU has one or two ROM chips that must be replaced in order to install a different program.

-Uwe-
 
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Dr Sheldon

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Easiest fix?. Just get a blanking plate :). That way the EGR gunk won't enter your engine and the engine thinks the EGR is working as it should.
@KAISER GARAGE PT

The pair of you have no clue so you are a danger to the car !! Lets guide you right !!


The ECU strategy is better than that !!

How do you think a EGR "insufficient flow" DTC is thrown ??

When the ECU commands the EGR to open - First the ECU decides how far it opens the EGR 0 - 100% and anything in between.

As it opens the EGR it will expect Air Mass to drop by the same amount that it thinks *unmetered air is entering the Engine. If there is an anomaly you get a EML and a fault code.

* Unmetered Air is Air entering the Engine that has not been measured by the MAF (Mass Air Flow Sensor)

If you block the EGR with a plate - The EGR will Open and MAF will not drop = Fault !!

The ECU will also look at the Oxygen Sensor, Of course it will have less Oxygen than Fresh Air !! o2 will sniff that within half a second !!

New New cars a configured differently but on the "Old Nails" such as yours the Oxygen Sensor on diesel cars was put there only there for one reason and that was to monitor EGR function - It had no other function !! ** that info is direct from a BOSCH Technical Training Course in the UK""

European cars will likely be the same - cannot speak for the American models !!

So you can block the EGR but you will have to alter the ECU software !!
 
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KAISER GARAGE PT

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@KAISER GARAGE PT

The pair of you have no clue so you are a danger to the car !! Lets guide you right !!


The ECU strategy is better than that !!

How do you think a EGR "insufficient flow" DTC is thrown ??

When the ECU commands the EGR to open - First the ECU decides how far it opens the EGR 0 - 100% and anything in between.

As it opens the EGR it will expect Air Mass to drop by the same amount that it thinks *unmetered air is entering the Engine. If there is an anomaly you get a EML and a fault code.

* Unmetered Air is Air entering the Engine that has not been measured by the MAF (Mass Air Flow Sensor)

If you block the EGR with a plate - The EGR will Open and MAF will not drop = Fault !!

The ECU will also look at the Oxygen Sensor, Of course it will have less Oxygen than Fresh Air !! o2 will sniff that within half a second !!

New New cars a configured differently but on the "Old Nails" such as yours the Oxygen Sensor on diesel cars was put there only there for one reason and that was to monitor EGR function - It had no other function !! ** that info is direct from a BOSCH Technical Training Course in the UK""

European cars will likely be the same - cannot speak for the American models !!

So you can block the EGR but you will have to alter the ECU software !!

That is some quality post of yours.



For now VCDS adaptation value for the EGR at 33768 will do the trick. I will test tomorrow and if it still limps it limps. Reconect the vaccum line to the actuator and the turbo does the rest.

Thanks
 
   #28  

Uwe

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-Uwe-
 
   #29  

Dr Sheldon

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Btw




thats why i've done a maf twist so that it can lower the air mass

That man in the Video is a 7uckin Idiot !!!
His technical career needs to die a slow painful death before there is any possibility of him reproducing and adding misery to this world !!!!

What a stupid Prick !!! And you are a fool for falling for that nonsense !!

Air mass MUST be Accurate to fuel the Engine Accurately - regardless of EGR !! Comprende ???

7uck my old boots !! Your name suggests you operate a Repair Garage ? God help us !!
 
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   #30  

DangerDane

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Dr Sheldon, exactly how is putting a backing plate on the EGR a danger to the car?.

You will spare it, not having to deal with extra soot particles in the intake, which then gets mixed with the oil vapours from the PCV, and in return produces a tar like substance that gunks your engine up. While it might not pass environmental inspection any sound person would get the EGR plated off and the PCV either vented to air, or at least a catch can to keep the engine "cleaner" for longer :)
 
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