16th October 2017, 12:40 AM
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Senior Member
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Join Date: Jan 2014
Location: Belgrave, Australia
Posts: 803
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The ECU measures (or estimates) torque loading on the engine using the MAF and then uses this information along with the TCU to optimise shifts.
If your MAF is past it, you can get some very rough shifting on moderate to heavy throttle.
Mine threw a code right on max rpm on the highway one day.
It banged into 3rd gear and I thought I'd broken something.
Gave me ESP and ABS fault lights - I thought the ESP might have chucked a wobbly!
Only on running a scan did I spot the faulty MAF.
Replaced it and everything got better!
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Cheers
Marty
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Current:
2001 Audi S8 - Brilliant Black with Black interior, C5 RS6 rims (whenever I actually put them on...), Solar Sunroof, Tinted side and rear glass, RNS-D, Grom, Bose, clunky old phone in arm rest!
2002 Audi S8 - Project
Replacement head coming arrived  thanks to MJ
Silver with Black interior. All features as the '01, with the 'S' mode auto shifter. Dodgey rear tint (need to find a way to get rid of that).
Family:
2009 Volvo XC90 V8 R Design - has a louder more obnoxious exhaust than the S8, sounds great! Love this thing - Q7 was double the price, and certainly not double the car!
Sold:
1997 Audi A4 - Hamilton's Club Sport, Achat Grey (will miss the old girl)
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