Idiotic question about MAF but...
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Audiworld Junior Member
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Idiotic question about MAF but...
I know this question has probably been asked millions of time...maybe a gazillion...
ok, how do I know my MAF failed or is failing...
2002 TT 1.8t, 65000 miles...I have not have many problems w/ the engine...but I'm asking b/c maybe I just haven't noticed it.
ok, how do I know my MAF failed or is failing...
2002 TT 1.8t, 65000 miles...I have not have many problems w/ the engine...but I'm asking b/c maybe I just haven't noticed it.
AudiWorld Super User
Joined: Mar 2000
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You are simply suffering from that painfull TT affliction known as "MAF Envy".
You want to be with the in-crowd, and perform all the self-dianosis known to man.
You want to impress your SUV-driving neighbors, and perform those important preventative measures, but you just don't know where to start.
It's easy then to assume "It's the MAF!, Yes, I can diagnose!"
Not meant to insult you here, but....
Seriously, get the VAG-COM S/W and monitor the appriopriate blocks, and you'll be fine.
The car will tell you if the MAF goes bad.
You want to impress your SUV-driving neighbors, and perform those important preventative measures, but you just don't know where to start.
It's easy then to assume "It's the MAF!, Yes, I can diagnose!"
Not meant to insult you here, but....
Seriously, get the VAG-COM S/W and monitor the appriopriate blocks, and you'll be fine.
The car will tell you if the MAF goes bad.
AudiWorld Senior Member
Joined: Feb 2006
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Re: You are simply suffering from that painfull TT affliction known as "MAF Envy".
LOL ...I keep hearing about the "appropiate blocks" but no one has ever posted a definative desciption of which blocks and what they should read.....
Failing a check engine light that is.
Failing a check engine light that is.
AudiWorld Super User
Joined: Mar 2000
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Well, Block 32 will tell you a lot. others are...
A few note worthy measurement blocks (there are many permutations, only a partial list):
002: fuel injection period & air mass flow
005: car speed
010: ignition timing
020: ignition timing corrections cyl #1-#4
026: knock sensor voltage cyl #1-#4
033: before cat O2 signal
034: before cat exhaust temp
037: after cat O2 signal; +dwell: shift lean; -dwell: shift rich
043: after cat O2 signal & exhaust temp
051: selected gear; 0=no power or neutral
062: raw throttle & pedal signals
102: coolant & intake temp
113: barometric pressure
115: manifold, command & turbo pressure
119: wastegate regulation
120: torque & hp
208: throttle opening
002: fuel injection period & air mass flow
005: car speed
010: ignition timing
020: ignition timing corrections cyl #1-#4
026: knock sensor voltage cyl #1-#4
033: before cat O2 signal
034: before cat exhaust temp
037: after cat O2 signal; +dwell: shift lean; -dwell: shift rich
043: after cat O2 signal & exhaust temp
051: selected gear; 0=no power or neutral
062: raw throttle & pedal signals
102: coolant & intake temp
113: barometric pressure
115: manifold, command & turbo pressure
119: wastegate regulation
120: torque & hp
208: throttle opening
AudiWorld Senior Member
Joined: Feb 2006
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Thanks Jeff.....
I learned some more today ... besides... knowing who to listen to and who not to this forum thing sure is WILD!!
At my age (67) it is easier than ever to smell the BS even from an electronic didtance...heheh
But guys like yourself and Schwing make wading thru the merde worthwile. Thanks again
At my age (67) it is easier than ever to smell the BS even from an electronic didtance...heheh
But guys like yourself and Schwing make wading thru the merde worthwile. Thanks again
AudiWorld Uber User
Joined: Dec 2000
Posts: 53,281
Likes: 2
The (3) I use the most...>>
That seem to provide a good diagnostic summary are:
002: Mass air G/sec
118: Intake temp/N75 Duty Cycle/IC pressure
204: Command, IC, and Manifold pressures
3rd gear run WOT 2K to redline.
002: Mass air G/sec
118: Intake temp/N75 Duty Cycle/IC pressure
204: Command, IC, and Manifold pressures
3rd gear run WOT 2K to redline.
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