ZPOST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   ZPOST > BMW Z4 Technical Talk > Engine, Exhaust, Drivetrain Modifications
  TireRack

SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
Post Reply
 
Thread Tools Search this Thread
      12-03-2012, 09:58 PM   #1
ZStig
Major General
101
Rep
7,242
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Removing secondary air pump?

Is this the thing you need to be able to eliminate your secondary air pump?

http://store.vacmotorsports.com/vac-...ete-p1744.aspx


I'm curious, as the air pump is an emmisions piece that weights about 5lbs, that just pumps air into the primary cats (which I've eliminated with the euro headers). Apparently you'll throw a code without it, so I'll do it with my next upgrade/tune



EDIT: see page 3 for install of blocking plate. no codes thrown. 4.25 lbs saved
__________________

Last edited by ZStig; 08-10-2013 at 11:56 AM.
Appreciate 0
      12-03-2012, 10:08 PM   #2
inTgr8r
Major General
inTgr8r's Avatar
Canada
113
Rep
8,083
Posts

 
Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

It will probably throw a code.
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R COs + ARBs•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•
Appreciate 0
      12-03-2012, 11:45 PM   #3
ZStig
Major General
101
Rep
7,242
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Quote:
Originally Posted by inTgr8r View Post
It will probably throw a code.
From what I've read, it will. But I'm still very interested in simplifying my engine bay.

I'll get this removed and code removed when I do my 10psi pulley/injectors/custom tune this spring

IIRC some russian guy that ran a z4 turbo in the moscow unlimited had this part removed too..
__________________
Appreciate 0
      12-04-2012, 10:56 AM   #4
davesz4mc
Second Lieutenant
4
Rep
274
Posts

 
Drives: 2007 z4mc
Join Date: Feb 2012
Location: San Antonio, Tx

iTrader: (0)

Yes thats what you need.

Same thing as on a 2002 vw gti turbo that I removed the secondary pump as well.

If Evolve would delete the code for me I would remove as well.
__________________
2007 Z4MC, 1" drop H&R Springs, Evolve Tunning, Headers, K&N Filter, RPI scoop, Red top high energy coils, UUC Red Poly mounts (none bolt-through), UUC Lightweight Flywheel with Organic Clutch and a custom exhaust with just one AeroTurbine muffler.
Appreciate 0
      12-04-2012, 11:29 AM   #5
inTgr8r
Major General
inTgr8r's Avatar
Canada
113
Rep
8,083
Posts

 
Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

^ that would be good to know.

That VAC plate seem expensive for what it is.
Shouldn't be too hard to mfg as a DIY
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R COs + ARBs•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•
Appreciate 0
      12-04-2012, 11:37 AM   #6
Beedub
Brigadier General
United Kingdom
54
Rep
4,090
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

if this can be deleted and cause no issues.... may as well drop the weight, think its a great idea and something else removed that could cause issues down the line...

Great idea tom....
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      12-04-2012, 06:18 PM   #7
ZStig
Major General
101
Rep
7,242
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Plus, it would eliminate that annoying suction sound when the car is cold. This mod is definitely on my to-do list.
__________________
Appreciate 0
      12-25-2012, 10:53 PM   #8
rkstar9
Private First Class
1
Rep
128
Posts

 
Drives: z4 2.5i
Join Date: Sep 2010
Location: Chicago

iTrader: (2)

Mine failed so Instead of buying one I installed a secondary air pump simulator..The pump is still attached tho..too lazy to remove it.

I am certain there is a way to turn off the light trough DIS/GT1 have yet to find out how!

40 bucks is a lot of money for that cover!
Appreciate 0
      12-26-2012, 03:47 AM   #9
Beedub
Brigadier General
United Kingdom
54
Rep
4,090
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

Quote:
Originally Posted by rkstar9 View Post
Mine failed so Instead of buying one I installed a secondary air pump simulator..The pump is still attached tho..too lazy to remove it.

I am certain there is a way to turn off the light trough DIS/GT1 have yet to find out how!

40 bucks is a lot of money for that cover!
whats an air pump simulator??

well it seems their is a BMW block of piece :-)
also this only does something at cold start.... would still like to get rid however, it would make a great ready made holder for something else :-)

nice thread here

http://m3forum.net/m3forum/showthrea...=387116&page=3
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.

Last edited by Beedub; 12-26-2012 at 04:01 AM.
Appreciate 0
      12-30-2012, 04:30 PM   #10
rkstar9
Private First Class
1
Rep
128
Posts

 
Drives: z4 2.5i
Join Date: Sep 2010
Location: Chicago

iTrader: (2)

The secondary air pump simulator...simulates increased o2 flow trough your o2 sensor (simulating a blowing pump) for the first 30 seconds after starting the car only in cold weather temperature. That is the only time the pump does anything.

then after that time it restores normal o2 sensor input.

so the ecu senses the pump doing it's job and goes on happily ever after


here is a thread I made about it

http://www.zpost.com/forums/showthre...&highlight=sap


You can buy one on ebay or make your own for 25 bucks...it involves connecting a wire to your sap and cutting your o2 sensor to insert dummy data.
Appreciate 0
      12-30-2012, 05:33 PM   #11
Gt4
Captain
Gt4's Avatar
Canada
7
Rep
625
Posts

 
Drives: E36/8 Z3MC / E90 M3
Join Date: Jan 2012
Location: Montreal

iTrader: (4)

I have removed the secondary air pump/EGR valve a little bit after I did the CSL headers install this summer and no CEL. Maybe because I already have a flash software with the ESS VT1-445

I think you should try Zstig, pretty sure you don't need a reflash with your ESS setup. Anyway, even if it throw a code, the car will still work fine.

And please don't pay for the VAC cover. DIY! It's super easy to do with a drill and a grinder with cutting disc. Just use a piece of 1/4'' SS flat bar and put some hi-temp silicone to do a gasket. Use the OEM nut that are already there to hold the flange the EGR valve and also use that flange to get the shape to cut. It will look like this in the end:

http://store.bimmerworld.com/s50-eur...ate-p1048.aspx


Look clean under the hood also!
Appreciate 0
      12-30-2012, 05:35 PM   #12
Gt4
Captain
Gt4's Avatar
Canada
7
Rep
625
Posts

 
Drives: E36/8 Z3MC / E90 M3
Join Date: Jan 2012
Location: Montreal

iTrader: (4)

If somebody needs a secondary air pump with EGR valve, I can sell mine!
Appreciate 0
      12-31-2012, 02:42 AM   #13
tikamak
Captain
Lebanon
13
Rep
791
Posts

 
Drives: 2006 Z4M Roadster TiAG/black
Join Date: Jun 2011
Location: Beirut

iTrader: (0)

How does the car behave on cold start? does it idle good ?
Appreciate 0
      12-31-2012, 05:15 AM   #14
Beedub
Brigadier General
United Kingdom
54
Rep
4,090
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

After reading all the threads on this, it seems this thing does.... Nothing basically after startup!!!!. This would be a great place to mount a meth/water pump, then use a SS tank to mount close by.
I'm just going to leave this SAP in place however, if it fails ever then ill just remove it.
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.

Last edited by Beedub; 12-31-2012 at 05:44 AM.
Appreciate 0
      12-31-2012, 05:29 AM   #15
tikamak
Captain
Lebanon
13
Rep
791
Posts

 
Drives: 2006 Z4M Roadster TiAG/black
Join Date: Jun 2011
Location: Beirut

iTrader: (0)

Why leave the SAP again ?
Appreciate 0
      12-31-2012, 08:19 AM   #16
Beedub
Brigadier General
United Kingdom
54
Rep
4,090
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

Quote:
Originally Posted by Gtfour View Post
I have removed the secondary air pump/EGR valve a little bit after I did the CSL headers install this summer and no CEL. Maybe because I already have a flash software with the ESS VT1-445

I think you should try Zstig, pretty sure you don't need a reflash with your ESS setup. Anyway, even if it throw a code, the car will still work fine.

And please don't pay for the VAC cover. DIY! It's super easy to do with a drill and a grinder with cutting disc. Just use a piece of 1/4'' SS flat bar and put some hi-temp silicone to do a gasket. Use the OEM nut that are already there to hold the flange the EGR valve and also use that flange to get the shape to cut. It will look like this in the end:

http://store.bimmerworld.com/s50-eur...ate-p1048.aspx


Look clean under the hood also!
interesting!!!!! tom, maybe drop an email to ESS and see if theis is unused in their tune :-) will you post back and confirm?? Seems you may be able to just throw this away :-)
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      12-31-2012, 10:16 AM   #17
Gt4
Captain
Gt4's Avatar
Canada
7
Rep
625
Posts

 
Drives: E36/8 Z3MC / E90 M3
Join Date: Jan 2012
Location: Montreal

iTrader: (4)

Yes no problem with idle at cold start.

I removed the secondary air pump on my E46 M3 back in 2008 without any software reflash and it does throw a code but that's it, didn't feel any difference when starting the car.

The SAP is there only to shoot some air so the cats warm up faster and are more efficient.

When I installed CSL headers last summer on my car, I didn't got a CEL either.
Appreciate 0
      01-03-2013, 03:31 PM   #18
ZStig
Major General
101
Rep
7,242
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Now that I moved to my new place, WITH a garage, I'm gonna try this out on my free time. Very good to know that it won't likely throw a code!
__________________
Appreciate 0
      01-03-2013, 03:59 PM   #19
Rated M Roadster
Captain
Rated M Roadster's Avatar
11
Rep
706
Posts

 
Drives: 2011 X5M
Join Date: Jun 2011
Location: ABQ

iTrader: (7)

Definition of what it does: http://www.unofficialbmw.com/images/...lectronic3.pdf

"Secondary Air Injection is required to reduce HC and CO emissions while the engine is warming up. Immediately following a cold engine start (-10 to 40°C) fresh air/oxygen is injected directly into the exhaust stream. The temperature signal is provided to the ECM by the Air Temperature Sensor in the HFM. The ECM provides a ground circuit to activate the Secondary Air Injection Pump Relay. The relay supplies voltage to the Secondary Air Injection Pump. The single speed pump runs for approximately 90 seconds after engine start up. * Below -10º C the pump is activated briefly to “blow out” any accumulated moisture. Secondary Air Injection Monitoring is performed by the ECM via the use of the pre-catalyst oxygen sensors. Once the air pump is active and is air injected into the exhaust system the oxygen sensor signals will indict a lean condition. If the oxygen sensor signals do not change within a predefined time a fault will be set and identify the faulty bank(s). After completing the next cold start and a fault is again present the “Malfunction Indicator Light” will be illuminated."

I'd also be interested in removing this assuming my tune doesn't give a CEL. I'll check on it...
__________________

SOLD Z4MR ll VF570 470whp 344wtq ll AA headers
RE X-pipe ll Stromung ll APEX ARC-8 on PSS
Stoptech 6pot Fr ll H&R coilovers ll APEX stud kit
Aero skirts ll Passport SRX

Last edited by Rated M Roadster; 01-03-2013 at 04:04 PM.
Appreciate 0
      01-04-2013, 12:44 AM   #20
22022
Private First Class
22022's Avatar
Canada
1
Rep
112
Posts

 
Drives: VT2-500 ZM4 roadster
Join Date: Dec 2009
Location: Vancouver

iTrader: (0)

Quote:
Originally Posted by ZStig View Post
Now that I moved to my new place, WITH a garage, I'm gonna try this out on my free time. Very good to know that it won't likely throw a code!
Keep us posted Zstig,I would think if it works on your car it would work on mine
assuming that we go the same tune from ESS.
__________________
Appreciate 0
      08-02-2013, 07:27 PM   #21
seank
enthusiast
seank's Avatar
18
Rep
1,531
Posts

 
Drives: e30 m3,e90 wagon,sprinter,z4m
Join Date: Dec 2011
Location: sacramento, ca

iTrader: (3)

Quote:
Originally Posted by AndrewLang View Post
We've been doing a lot of swaps lately so we made our own:

http://store.langracing.com/s54-s50b...or-egr-delete/
Andrew, what are you doing on here? This is Temple from s14.net. Not on there much, until I get the car ready for next track season.


This is confirmed to throw a code???
Appreciate 0
      08-02-2013, 08:59 PM   #22
dorifto88
Major
11
Rep
1,046
Posts

 
Drives: 88 Nissan Pathfinder
Join Date: May 2010
Location: cowtown

iTrader: (3)

i dont think anyone besides gtfour have done this, though i could be mistaken.

i also have a desire to do this as well, but i really dont want to risk throwing a code lol, though i have read about e46s NOT throwing a code with it removed
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 03:22 PM.




zpost
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST