Secondary Air Pump

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OXO
Joined: Wed 31 Mar, 2010 09:32
Posts: 566

  Z3 roadster 2.2i
Location: France

Secondary Air Pump

Post by OXO » Sun 02 Jun, 2013 14:14

Hi, as many of you here know, I have JP spec 2.2i, 2001.

It's been in storage since last July. I just fired it up and it's got a check engine light, and CEL code P0414.

This is "Secondary Air Injection System Switching Valve A Circuit Shorted". I am guesing that the pump is jammed, and therefore shorting out the supply.

I think this will be fixed if I just unplug the pump.. but where to find it? Can anybody help?

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Brian H
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  Z3 roadster 3.0i

Re: Secondary Air Pump

Post by Brian H » Sun 02 Jun, 2013 16:43

My initial thoughs were this: -

Image Emission control-air pump - BMW parts catalog

Image

The description is emissions air pump though?

pedro20001
Joined: Sat 29 Jan, 2011 20:34
Posts: 357

  Z3 roadster 2.2i
Location: tamworth

Re: Secondary Air Pump

Post by pedro20001 » Sun 02 Jun, 2013 21:38

There was an old thread ( sorry, can't remember where!) on here where someone made a blanking plate so that the whole assembly can be binned, possibly gookah? if my poor memory is right !

gookah
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  Z3 roadster 2.8

Re: Secondary Air Pump

Post by gookah » Sun 02 Jun, 2013 23:26

pedro20001 wrote:There was an old thread ( sorry, can't remember where!) on here where someone made a blanking plate so that the whole assembly can be binned, possibly gookah? if my poor memory is right !

Wow, what a memory!!

The pump was noisy on my son's car so I disconnected it. However doing that alone will cause problems as it is meant to pump cold fresh air into the exhaust on startup via the diaphragm valve (Pictured)
Image

This valve opens when the pump runs to let the air in and reduce emissions on startup, (USA requirement).
If the pump is disconnected or seized, The diaphragm valve still opens but actually allows the hot exhaust gasses out, and melts the hoses. hence I made a blanking plate to go on the manifold under the diaphragm valve. This way no gasses out and no useless noisy pump.

Image

Image

Image

Image
Blank fitted and then diaphragm valve bolted back on to hold it in place..
By the way , it's been through several MOT's since then with no emission problems.
Image

Z3 2.8 Progress Journal (Mine)
Z3 1.9 Sport Progress Journal (Wifey's)

I have an element of 'M-styling' on my car, If that's a good enough reason for the manufacturers to adorn a 320 with the M badge, then its certainly a good enough reason for me..

paul.s
Joined: Wed 26 Dec, 2012 09:54
Posts: 42

  Z3 roadster 2.8

Re: Secondary Air Pump

Post by paul.s » Mon 03 Jun, 2013 06:16

oops we just unplugged ours as the pump was noisey :oops: but we did this when we first got it around 7 years ago don't think anything has melted id better check :?

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OXO
Joined: Wed 31 Mar, 2010 09:32
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  Z3 roadster 2.2i
Location: France

Re: Secondary Air Pump

Post by OXO » Mon 03 Jun, 2013 07:03

Thanks all, I'll try and disconnect it later and report back.

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OXO
Joined: Wed 31 Mar, 2010 09:32
Posts: 566

  Z3 roadster 2.2i
Location: France

Re: Secondary Air Pump

Post by OXO » Mon 03 Jun, 2013 10:18

I still can't find it. In the picture above I don't have that black pump looking thing on the left. I have a huge washer bottle.

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OXO
Joined: Wed 31 Mar, 2010 09:32
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  Z3 roadster 2.2i
Location: France

Re: Secondary Air Pump

Post by OXO » Mon 03 Jun, 2013 13:52

And here a pic..

Image

bowei001
Joined: Mon 13 Apr, 2009 17:38
Posts: 201

  Z3 roadster 2.0
Location: Sudbury

Re: Secondary Air Pump

Post by bowei001 » Mon 03 Jun, 2013 14:20

A search on RealOEM suggests that a 2.2i LHD vehicle has a secondary air pump (which should be located at the front of the car where your washer bottle is) but that the RHD version doesn't have the air pump. That's curious!

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BladeRunner919
Joined: Fri 17 Feb, 2012 20:18
Posts: 2221

  Z3 roadster 1.9

Re: Secondary Air Pump

Post by BladeRunner919 » Mon 03 Jun, 2013 14:57

bowei001 wrote:A search on RealOEM suggests that a 2.2i LHD vehicle has a secondary air pump (which should be located at the front of the car where your washer bottle is) but that the RHD version doesn't have the air pump. That's curious!
Aren't they only used in the USA to give the impression that emissions are lower than they are by diluting the exhaust with air (thereby not actually reducing the emissions at all), and all US cars are, of course, LHD. Or are they used in other territories?

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OXO
Joined: Wed 31 Mar, 2010 09:32
Posts: 566

  Z3 roadster 2.2i
Location: France

Re: Secondary Air Pump

Post by OXO » Mon 03 Jun, 2013 17:40

It's weird that it looks like there is no pump, but the ECU has a pump driver error.

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Robert T
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  Z3 roadster 1.9
Location: Cheshire

Re: Secondary Air Pump

Post by Robert T » Mon 03 Jun, 2013 18:08

Just a thought, but the zeds are pre-wired for just about all options, so I would expect the wiring harness for the solenoid that operates the vacuum valve for the secondary air pump to be present on your car even if you have neither the valve or the pump. Have a look for damage to the wiring loom in that area, in particular look for any loose connectors - a short either between the pins of the connector or damage to the sheathing of the wires could both be culprits.

Cheers R.
Arctic Silver '99 Z3 1.9 & Black '59 Frogeye 1275cc
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OXO
Joined: Wed 31 Mar, 2010 09:32
Posts: 566

  Z3 roadster 2.2i
Location: France

Re: Secondary Air Pump

Post by OXO » Mon 03 Jun, 2013 18:26

I left the car out in the sun all day with the boot and bonnet open, to get some air in and dry out any condensation.

On with the scan tool, and reset the DTC.

Quick run round the lanes, and it's fixed. No lights, and it's running lovely..

So there... :roll:

pedro20001
Joined: Sat 29 Jan, 2011 20:34
Posts: 357

  Z3 roadster 2.2i
Location: tamworth

Re: Secondary Air Pump

Post by pedro20001 » Mon 03 Jun, 2013 20:42

glad to hear its better; my moms 1999 2.0 had one, my 2001 2.2 doesn't !!!

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g8jka
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Joined: Sun 18 Apr, 2010 22:16
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  Z3 roadster 2.8
Location: Telford

Re: Secondary Air Pump

Post by g8jka » Wed 22 Feb, 2017 17:20

gookah wrote:
pedro20001 wrote:There was an old thread ( sorry, can't remember where!) on here where someone made a blanking plate so that the whole assembly can be binned, possibly gookah? if my poor memory is right !

Wow, what a memory!!

The pump was noisy on my son's car so I disconnected it. However doing that alone will cause problems as it is meant to pump cold fresh air into the exhaust on startup via the diaphragm valve (Pictured)
Image

This valve opens when the pump runs to let the air in and reduce emissions on startup, (USA requirement).
If the pump is disconnected or seized, The diaphragm valve still opens but actually allows the hot exhaust gasses out, and melts the hoses. hence I made a blanking plate to go on the manifold under the diaphragm valve. This way no gasses out and no useless noisy pump.

Image

Image

Image

Image
Blank fitted and then diaphragm valve bolted back on to hold it in place..
By the way , it's been through several MOT's since then with no emission problems.
I might need you to make me up another one of these please, ASAP :roll:
2000 BMW Z3 2.8 Titanium Silver Roadster with too many mods to list :-D :drive
Image
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