Secondary Air pump - proper part number

[Aronis]

Scan from this morning:

5 Faults Found:

17831 - Secondary Air Injection System; Bank 1
P1423 - 002 - Insufficient Flow - MIL ON
17819 - Secondary Air Injection System; Bank 2
P1411 - 002 - Insufficient Flow - MIL ON
17887 - Brake Boost Vacuum System
P1479 - 008 - Mechanical Failure
17865 - Exhaust Gas Temp Sensor 2 (G236)
P1457 - 001 - Open or Short to Plus - Intermittent
16840 - EVAP System
P0456 - 002 - Very Small Leak Detected - Intermittent

So it's a both side problem. Solenoid is new, pump is new. Only thing would be bad Oxygen Sensor (my largest fear when replacing all four) but that would have to be TWO bad ones out of four, so very unlikely

The new pump is quite loud ? Running against closed CombiValve?

I also replace the vacuum relay on the vacuum line, that initially appeared to have cleared the problem as I did not get a CEL for about two weeks. That is when I bit the bullet and bought the new Secondary Air pump. I had read about them failing but could not confirm this. The new one is shinny and new, but I get the CEL again! Maybe a vacuum line came off? I'll take a look.

I have not taken the time to pull the air cleaner intake assembly, been waiting for better weather. Every time I go out to work on my car in the garage, my wife lets the FCUKGONDOING GODDOIHGOID FROIGLJDLD dog out through the garage every FOU$)(UOU DF)*(&)(*D five minutes and opens the garage and thus freezes me!

So I am going to check the vacuum lines again. My understanding is that the way to check the Combi Valves is to apply vacuum to the combi valve vacuum port and 'blow' by month through the hose and see if you feel resistance? Odd. I think taking the hose off the secondary air pump and starting the engine would show huge amounts of exhaust gas coming out that hose? NO? If the combi valves are open then the exhaust will follow the path of least resistance and blow out there. There is no check valve in the system as far as I can tell?

This other error confounds me.

17887 - Brake Boost Vacuum System
P1479 - 008 - Mechanical Failure

The brakes feel perfectly fine. My mechanic said if could be one of many sensors in the antilock brake system. I think the guys who write the code for the ECU should go hang themselves. Why not have more info dumped out than such a cryptic piece of information if indeed there are other 'sensors' which are giving input to the ECU, then there should be an accounting of such information?

17865 - Exhaust Gas Temp Sensor 2 (G236)
P1457 - 001 - Open or Short to Plus - Intermittent

This used to be on both sides, but after the 're-solder' thing it only shows on one side. I will 're-re-solder' once the weather improves? August? September? Not sure. God I hate living in NY. This does not trip a CEL.

16840 - EVAP System
P0456 - 002 - Very Small Leak Detected - Intermittent

Gas cap no doubt! LOL. Usually Trips a CEL if it happens a certain number of times.

Funny the insufficient flow thing trips a CEL right away, but if your torque converter is not Locking then Tough Shit because it will only trip a CEL if it persists for 1000 years or more and by that time your transmission is dead. Nice design. Nice programing. Maybe the TCU programers can join the ECU programs on the unemployment line. Bastards.

Mike

[nubcake]

17887 - Brake Boost Vacuum System
P1479 - 008 - Mechanical Failure

The brakes feel perfectly fine. My mechanic said if could be one of many sensors in the antilock brake system. I think the guys who write the code for the ECU should go hang themselves. Why not have more info dumped out than such a cryptic piece of information if indeed there are other 'sensors' which are giving input to the ECU, then there should be an accounting of such information?

http://wiki.ross-tech.com/wiki/index...7/P1479/005241
http://www.audizine.com/forum/showth...-Failure-P1479

A faulty vac pump, or a leak in the hose/tubing or a bad booster vac supply check valve, or a bad brake booster are all possible causes for the 17887 DTC stored.

This "bug" in vacuum system can also be related to your SAI troubles (if you're not getting the vacuum to SAI solenoid - it can't open combi valves).

[Aronis]

Yes, I had read through that before, when I took the tubing off the Solenoid there was still plenty of vacuum, it was sucking for about 20 to 30 seconds LOL. My finger was able to get stuck to the open end of the tubing....

Vac Pump is where? ( I have to check my notes, I think I found that before) Does that not draw from the intake directly?
Where is Booster Vac Supply Check Valve? If any of that stuff is under the GD intake manifold, I'm going to leave it as is! LOL.

Funny I reset the CEL yesterday. I let the car run in place until the Secondary pump stopped running and then drove. I am going to do this for the next week or so. It seems that when I drive off without waiting the CEL comes on a few minutes later. LOL. I did check the connections at the solenoid and they are still in place as are the tubes connecting to the CombiValve vacuum ports. I HATE intermittent problems LOL.

I have to figure out how to test the above items you mentioned.

Mike

(reading the links you included now....)

[Aronis]

A while ago I tried that Short Trip in Basic settings and it was ok.

I also checked the tubing going to and leaving the Vacuum Pump and that seamed ok.



I'll have to run through that process again.

My mechanic actually bought the Smoke tester for vacuum leaks to work up my problem when the Cam Tensioners failed and he said there were no vacuum leaks. LOL. I may bite the bullet and bring the car to an AUDI dealer.

Mike