WOT Issue & Fault Codes - Page 2

Isimmo · 04-08-21, 08:32 PM

Simple test for N75 ‘triggering’ for an AAN/ABY is disconnect it electronically. If it makes no difference then that doesn’t (necessarily) mean to say the N75 (in itself) is broken, it means the ECU isn’t seeing the right signals (conditions) to trigger N75 and that might be boost leakage or, more likely, the MFTS (Multi function temperature switch) etc.

BackintheFold · 05-08-21, 09:16 AM

Quote:

Originally Posted by Isimmo

Finally, I just went mad one weekend and stripped out all the tiny vacuum lines out the back of the head and replaced with new. Most were like something out of an Indiana Jones movie and turned to dust.

Can I please ask what size the vacuum hose is? I want to replace all of mine with new, but am away from the car...
I see "3mm" and "5mm" cited, as well as 5/32 inch.
Is that internal or external diameter? And what is the right size for the B2? I'm guessing 12 feet/4 meters would be enough.

I'll take a look at mine next week if no-one knows off the top of their head!
This is what I'm thinking is correct-4m at 3.2mm inside and 10mm outside diameter.
https://www.ebay.co.uk/itm/113923748...oAAOSw85Jexp3q

Cheers

04-08-21, 08:32 PM	#11
Isimmo Super Moderator Classic Audi Club Member Join Date: Jul 2007 Location: Sissix-by-the-sea Posts: 15,218	Simple test for N75 ‘triggering’ for an AAN/ABY is disconnect it electronically. If it makes no difference then that doesn’t (necessarily) mean to say the N75 (in itself) is broken, it means the ECU isn’t seeing the right signals (conditions) to trigger N75 and that might be boost leakage or, more likely, the MFTS (Multi function temperature switch) etc. __________________ 1985 WR quattro, 1985 20vT RallyRep, 1993 MTM ABY S2 Avant. 2010 S3 Sportback. Last edited by Isimmo; 04-08-21 at 08:40 PM.