Rachelkgr
Active Member
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Jumping in here! If I have now removed my EGR, can I remove my MAF? Been thinking of adding a K&N!
Consequences of disabling MAF on 2.5 Diesel
- Thread starter Jovial John
- Start date
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Jovial John
Member
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Just unplug it and run it for a month or so, checking mpg and paying attention to how it runs in various road conditions as I am, I will also have the emissions checked at an MOT centre to compare with the last reading. I will report back with results later.
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It supplies airflow info to the ECU to control EGR. The change in airflow through the MAF tells the ECU how much exhaust gas is being ingested at any particular time when EGR is working. The ECU then modulates the EGR control solenoid to increase or decrease to suit requirements.
Last edited:
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Leave the MAF connected. K&N will do nothing for you.
Jovial John
Member
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wammers if you prefer to be offensive, be my guest, but do two things as well, learn to read and learn to understand, then read the official workshop manual.
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Don't try to teach your granny to suck eggs. I have forgotten more about diesel engines than you will ever learn. I have read it it is not correct.
Jovial John
Member
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If you're my Granny, congratulations on receiving your card from the Queen and enjoy your remaining years with us. Obviously this must be some of what you've forgotten, don't presume you know more than others when you know nothing about them, your arrogance says it all, I've met and dealt with "experts" in all fields during my lifetime, medical, legal, criminal, builders, plumbers, electricians, electronics, IT and motor mechanics and my own profession. They all have indicated that those that are truly expert, are in the minority, the majority doing the minimum to draw their wages. End of communication, signing off, returning to the adult forum.
Datatek
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A K&N will simply bugger the MAF and no you cannot remove the MAF.
Datatek
Well-Known Member
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Since the MAF is some one metre or more upstream of the EGR and the other side of a compresor driven by the exhaust which is fuel dependent, it would be interesting the hear how it detects a 20 second burst (your figure) of exhaust gas being injected into the exhaust manifold.
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The EGR modulation works in 20 second cycles. When EGR is working modulation is adjusted as required every 20 seconds. Please know what you are talking about. Admittedly it does not help when RAVE confuses the situation by talking about both systems at the same time and giving contrary information by mixing component descriptions. Take the pipe off the EGR valve and run the engine at a steady speed above idle, put a finger over in end of the pipe, you should feel the vacuum being applied to the end of your finger.
Datatek
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I'm sure you can, but can you detect any mesurable difference in airflow through the MAF with the EGR connected in the same situation.
Bosch agree with the final version of RAVE.
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On this subject i know a lot more than you. The confusion comes from the Land rover technical writer getting his knickers in a twist and confusing two different systems. If you know so much why bother asking questions then. Just sort it yourself from your vast knowledge. Bloody idiot.
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The MAF sensor is there to give feedback to the ECU reference airflow to control the rate of EGR as opposed to an earlier version of EGR without feedback control. It complies with EC level 2 emission standards. As i have said before you believe what you want to to believe.
"1. Sensors: Inaccurate information from the charge pressure sensor, temperature sensor or mass air flow sensor, although it has no direct influence on the air supply, can cause the DDE control unit to misinterpret air conditions."
BMWs words not mine.
blue beasty
Leaks an prone to bits dropping off
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Where is the offensive comments.....before this one that is?
Some folk don't try very hard to live up to their forum names do they
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- 58,170
- Location
- Preston Lancs.
Where is the offensive comments.....before this one that is?
Some folk don't try very hard to live up to their forum names do they
Pity really with his vast knowledge of everything he could have been a positive asset in other sections of the forum. But may have been a slight let down in the diesel engine sections.
