Secondary air intake pump question

[subaruchic84]

Hey 

Long post alert!!

I have a 06 Impreza with a problem with the secondary air intake pump. I owned the car for 3 months before the engine management light came on. I had a diagnostic done & it shows a problem with the pump. I Initially took my car to a Subaru dealer who ran a diagnostic & said that I needed the pump replacing. After further investigation they said that the pump was working so they replaced a relay which didn't solve the problem. 

It's important to say at this stage that I have a de-cat exhaust & the car has had a full stage 1 remap.

I then decided to take my car to a different local place which specializes in tuning & performance. They said that the pump wasn't working so they have removed everything to do with the pump & I had asked them if they could blank out the pump within the ecu. They are not Subaru specialists & said that I may need a remap to do this & they would investigate things further with another company. 

I thought I would ask on here to see if anybody had the same problem & how it was dealt with.

Thanks in advance 

[The Don]

If you've had everything below removed and the heads blanked off, you can map out the secondary air system completely, either by yourself or by a mapper.

The thread link below is a very useful  for the DIY option

http://www.subaruforester.org/vbulletin/f75/secondary-air-injection-ultimate-solution-94534/

 

[subaruchic84]

Thank you. I think I would prefer someone else do it lol

[MarkJHarris]

Hi,

 

I had the same problem. I now have a spare pump as mine was ok and the fault was a seized (open) solenoid valve. If you look at parts 1 and 6 in the abov e picture, these are the two valves, for sending the fresh compressed air into the exhaust ports. They get moisture in them, particularly the front one, 6. This was my fault. It had put the MIL light on and eventually had gone into limp mode restricting boost to 0.5 bar.

I got two newer, clean valves from Alan Jeffery at a quite reasonable price of £50 for both. The aft one is easy to change bu the front one is an utter pig. to get to the mounting bolt, it requires the alternator, air con pump, and the guide to the wiring under the manifold to be all unbolted/removed. The back one needs the intercooler to come off.

All done and working fine now. Spare pump available if anyone wants it.

I could block them off but I have limited access to a mapping agent here so it can wait until I go down to Alan later in the year for the Cam Belt change. The Turbo itself really blocks access to the pipe fitting in the right head, very tight indeed. Probably easier to block off and seal at the other end of the pipe and leave it there..

Only fitted to 2.5 cars and a pain in the arse. I keep my engine bay looking stock which is why I didn't remove them. If it's seized open it will cause lean running and a fault/detune so needs attention either way. Once they are working fine they can be switched off and left on. Now that is a nuisance... 

[TheDong]

You can also leave all the stuff in place and disable the system on the ecu, as long as the valves are all closed there will be no issue........

[MarkJHarris]

Which is what I'll do this Summer when I take it down for the cam belts at Alan's.