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Title: Is this a MAF problem? Post by: rnagy86 on May 08, 2012, 02:47:19 AM Hi
I've been having really bad idles lately and I tried to unplug the MAF which made the car idle fine, but I have no MAF related CELs at all and it seems when I have the MAF plugged in, I get correct values. Can someone please have a look at these two VAG-COM logs and enlighten me? The Lambda Control values make me worry a bit (the o2 sensors are perfectly fine). MAF: https://docs.google.com/spreadsheet/ccc?key=0AhrG40GHpr-hdGZPMXVwYmhBSnA2ZkN5RzZlV3NJcVE#gid=0 NOMAF: https://docs.google.com/spreadsheet/ccc?key=0AhrG40GHpr-hdDh5cFZWSHVSbmZUWUJfdXNiZ2h4cVE#gid=0 Thank you! Title: Re: Is this a MAF problem? Post by: professor on May 08, 2012, 05:57:45 AM My 1.8T 20V has oil evaporative valve, fume oil returns from oil filter to turbo intake hose, which often brokes off and idle is going crazy.
Perhaps something similar happens to you? Title: Re: Is this a MAF problem? Post by: rnagy86 on May 08, 2012, 08:45:17 AM Is that the valve that's called N80 on the s4 b5?
Title: Re: Is this a MAF problem? Post by: rnagy86 on May 08, 2012, 08:50:48 AM Actually I am not even sure that the European models have an EVAP valve.
Title: Re: Is this a MAF problem? Post by: rnagy86 on May 08, 2012, 08:57:37 AM And of course just to say again I have no CELs at all, just the strange logs and symptoms.
Title: Re: Is this a MAF problem? Post by: rnagy86 on May 08, 2012, 09:05:52 AM Ok it turns out that I have it, so I plugged in a factory M box ECU and it popped me a P1473 EVAP Leak Detection Pump: Open Circuit.
But I do not have this DTC with my C and D ECU. Maybe they don't support it? Thanks Title: Re: Is this a MAF problem? Post by: rnagy86 on May 08, 2012, 01:44:51 PM Anyone? :)
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