#21
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#22
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Could someone please explain to me how a faulty MAF can destroy a gearbox?
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Del |
#23
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By the way, for ECU it is very difficult to catch MAF not working precisely. Most MAF inaccuracies are not noticed by ECU.
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I'd rather drive on left |
#24
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He was saying that as the ECU and the TCU both communicate with each other, when there are even slight deviations in MAF signal it can cause the transmission to shift at the wrong times. This in turn can pass too much torque through the box whilst in the wrong gear and cause excessive wear.
I would guess each gear has a designed operating RPM range and if operated outside those tolerances damage can occur. |
#25
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I suppose thats possible, but surely the ecu would communicate rpm etc too.
gearboxes are all about rpm and ratio so rpm would be a more logical signal to be sending to gearbox, but i guess load could be something to do with maf/ tps etc. Just seems weird imo that the maf would screw a gearbox, if you said it killed an engine I could understand that quicker. So how does one keep an eye on ones Maf? any links to what a good ones like and test procedures?
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Del |
#26
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That being said lot of failures are caused by faulty seal which fails due to age and thermal cycling. Oil contain conditioners for rubber parts but with age additives in oil wear out and stop conditioning them. Regular oil changes help to keep seals in good condition and last longer.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure |
#27
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The only way you can monitor in that depth is with diagnostic software.
This guy used to work at Audi. He was saying that RS6's had a massive problem with the MAF signals and people were replacing the MAF's periodically as preventative maintenance to help avoid gearbox failure. He knew of somebody who's RS6 box failed, had a new one fitted and within a couple of thousand miles it failed again due to the MAF's as they were overlooked. |
#28
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So any further info how to check a MAF?
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Del |
#29
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#30
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Gents,
If you replace the MAF is it also worth pulling the ECU fuse to reset everything so it can learn again? |
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