Rs6 Refurb Maf Readings

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
skinflintcustoms
Neutral
Posts: 23
Joined: Thu Oct 10, 2024 6:10 pm

Rs6 Refurb Maf Readings

Post by skinflintcustoms » Thu Oct 10, 2024 6:22 pm

Hi all first post..

I am refurbishing an RS6, and hit a problem with the MAF readings Bank 1 shows 7.53 g/s whereas Bank 2 shows 10.75 g/s also have a code for SAI insufficient flow on both Banks, I am assuming the pump has failed but I am struggling to sort the MAF problem, is this a common problem?

Thanks
Its not rocket science do it yourself.

User avatar
Shoppinit
Cruising
Posts: 20298
Joined: Wed Dec 31, 2008 6:24 pm

Re: Rs6 Refurb Maf Readings

Post by Shoppinit » Thu Oct 10, 2024 7:24 pm

Those are your MaF readings at idle?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

skinflintcustoms
Neutral
Posts: 23
Joined: Thu Oct 10, 2024 6:10 pm

Re: Rs6 Refurb Maf Readings

Post by skinflintcustoms » Thu Oct 10, 2024 7:54 pm

That was taken at 2300rpm the idle readings are Bank 1 2.39 g/s Bank 2 3.81 g/s
Its not rocket science do it yourself.

User avatar
Shoppinit
Cruising
Posts: 20298
Joined: Wed Dec 31, 2008 6:24 pm

Re: Rs6 Refurb Maf Readings

Post by Shoppinit » Thu Oct 10, 2024 8:42 pm

Bit low but not excessively so.

If you’re getting SAI errors you might have a vac leak.

Check that the SAI pump is working first. Then check the vac pipes for leaks or perished rubber.

MAFs might not be seated properly. That’s extremely common.

SAI combiner valves can fail, too, allowing unmetered air in.

Log the MAFs at WOT. See what readings you get.

Also what are your trim values (group 032)?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

skinflintcustoms
Neutral
Posts: 23
Joined: Thu Oct 10, 2024 6:10 pm

Re: Rs6 Refurb Maf Readings

Post by skinflintcustoms » Fri Oct 11, 2024 4:04 pm

So i pulled the airbox today and found this...

Top Bodging!
Looks like the MAF seal has gone aswell.
Attachments
rs 1.jpg
rs 3.jpg
rs 2.jpg
Its not rocket science do it yourself.

User avatar
Shoppinit
Cruising
Posts: 20298
Joined: Wed Dec 31, 2008 6:24 pm

Re: Rs6 Refurb Maf Readings

Post by Shoppinit » Fri Oct 11, 2024 4:27 pm

:shock: :shock: :shock:

:drink:
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

User avatar
Shoppinit
Cruising
Posts: 20298
Joined: Wed Dec 31, 2008 6:24 pm

Re: Rs6 Refurb Maf Readings

Post by Shoppinit » Fri Oct 11, 2024 4:29 pm

Hey, at least they didn't cut the original connector off!
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

skinflintcustoms
Neutral
Posts: 23
Joined: Thu Oct 10, 2024 6:10 pm

Re: Rs6 Refurb Maf Readings

Post by skinflintcustoms » Fri Oct 11, 2024 4:49 pm

The plug was also loose, all part of the journey, we have ticked off most of the major faults intercoolers leaking,DRC removed,belts are sorted, turbos are good, Vac pipes are all clear of leaks as far as i can see, smoke testing next week and the parts are ordered. lets see what the result is, The SAI pump is dead so that explains the fault code.
Its not rocket science do it yourself.

User avatar
Shoppinit
Cruising
Posts: 20298
Joined: Wed Dec 31, 2008 6:24 pm

Re: Rs6 Refurb Maf Readings

Post by Shoppinit » Fri Oct 11, 2024 4:51 pm

Cool. Doesn't sound like you're a million miles away from getting it running sweetly.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

skinflintcustoms
Neutral
Posts: 23
Joined: Thu Oct 10, 2024 6:10 pm

Re: Rs6 Refurb Maf Readings

Post by skinflintcustoms » Fri Oct 11, 2024 4:55 pm

With regards to the paint here it is polished up, ive never seen sprint blue in the flesh maybe someone can confirm, i just assumed Nogaro.
Attachments
rs6 10.jpg
rs6 11.jpg
Its not rocket science do it yourself.

User avatar
Shoppinit
Cruising
Posts: 20298
Joined: Wed Dec 31, 2008 6:24 pm

Re: Rs6 Refurb Maf Readings

Post by Shoppinit » Fri Oct 11, 2024 5:03 pm

Hard to tell from a photo. Only way to know for sure is the paint code on the options Sticker (or a dealer could get it from the VIN lookup, obvs).
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

skinflintcustoms
Neutral
Posts: 23
Joined: Thu Oct 10, 2024 6:10 pm

Re: Rs6 Refurb Maf Readings

Post by skinflintcustoms » Fri Oct 11, 2024 5:06 pm

The Code is blank on the Sticker I am going to contact the dealer, either way it is a stunning colour, I just like the prestige/heritage of Nogaro blue.
Its not rocket science do it yourself.

steve2003rs6
Cruising
Posts: 2948
Joined: Mon Aug 19, 2019 7:43 pm

Re: Rs6 Refurb Maf Readings

Post by steve2003rs6 » Fri Oct 11, 2024 5:40 pm

Yeah I must agree paintwork looks amazing.

I must get mine in for paint correction and ceramic.

skinflintcustoms
Neutral
Posts: 23
Joined: Thu Oct 10, 2024 6:10 pm

Re: Rs6 Refurb Maf Readings

Post by skinflintcustoms » Fri Oct 11, 2024 6:19 pm

Paint correction is worth learning yourself very satisfying, get some old car doors from the scrapper, and get a cheap DA from Amazon, look up Ammo on YouTube some great tutorials, Menzerna products are good. Ceramic, leave that to the pros!
Its not rocket science do it yourself.

steve2003rs6
Cruising
Posts: 2948
Joined: Mon Aug 19, 2019 7:43 pm

Re: Rs6 Refurb Maf Readings

Post by steve2003rs6 » Fri Oct 11, 2024 6:51 pm

I was quoted not so long ago by a top award winning detailer. His price was so reasonable that it’s not worth my time and effort to buy all the gear and get proficient at it.

However I do get the point of self satisfaction of doing it yourself.

Post Reply

Return to “RS6 / RS6 plus (C5 Typ 4B) 2002-2004”

Who is online

Users browsing this forum: No registered users and 97 guests