italiansta1978

i got a new 2001 allroad and in the morning when i first start the car it sounds like a jet engine while the rpm is running like 2000 anfter couple minutes the sound goes away and suggestions that this might be?
i think the sound is coming from middle of the engine by the windshield part of it and in the middle the thing looks like a bottle lol please help thanks brian.

happy allroader

Secondary air pump? If so, not a big deal.
http://www.ecstuning.com/Audi-All_Ro...sion/ES251956/

italiansta1978

thanks for getting bak to me it is the secondary air pump because when i put my hand on it it is buzzing and making the jet engine sound is it easy to replace? it looks like couple of bolts and disconneting the hoses right?

happy allroader

I haven't a clue so I did a "Google" search "audi allroad secondary air pump replacement" and it appears it is less than an hour job. I should have searched for "audi 2.7T secondary air pump replacement" but I'm learning.


https://www.audiworld.com/forums/sho....php?t=2763300

http://boardreader.com/thread/possib...mz56X2g7h.html

http://tech.bentleypublishers.com/th...9996&tstart=80

rebuild the pump post:

https://www.audiworld.com/forums/sho....php?t=1727056

Mr. Timewise

The problem is definitely the secondary air injection pump (SAIP).

The pump is most likely failing because water in the exhaust has gone backwards through one or both of the "combi valves". When the pump bearings rust enough, the pump will stop screaming at you and freeze completely. This will cause the 40 Amp fuse to open and/or the relay for the circuit to fail. These parts are next to the ECU in the black box under the cowling cover by the driver's side.

You will find that a scan of the car's electronics using a VAG-COM will be reporting problems with the SAIP. Eventually, the CEL warning in the instrument cluster will illuminate.

You might consider unplugging the two pin connector from the top of the SAIP. This will save the fuse and/or relay. Both are expensive.

The exhaust air MAY be entering the SAI system backwards because the combi valves are not closing completely when the SAIP is not operating. This is caused by soot from the exhaust coating the inside of the combi valve.

Unfortunately, the best solution is to replace the SAIP and the combi valves (if they don't close when no vacuum is applied to them). The "Y" hose between the SAIP and the combi valves can become brittle and need replacing, too.

See this:

https://www.audiworld.com/forums/sho....php?t=2773976

fjasper

the bearings are industry standard, about $8-10 each (there are two), and it should take a couple hours for a reasonably handy person to take it apart, replace the bearings and put it back together. There's a writeup on audiworld somewhere, search for SAI pump rebuild.