16th October 2017, 04:01 PM
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Senior Member
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Join Date: Jun 2013
Location: Londonderry, Northern Ireland
Posts: 2,955
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Quote:
Originally Posted by MikkiJayne
There is a very useful diagnostic mode in the ECU whereby if you read a particular measuring block it turns the O2 sensors off and runs open-loop on the MAF only. If it runs like crap at this point, or indeed anything other than perfect, the MAF is failing and needs replacement.
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MJ, is this within VCDS? Would be interesting to know where. I've run the other tests on the MAF in VCDS, and everything was within tolerances, but always handy knowing about other tests available.
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts
My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts
Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights
My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds
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