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Secondary Air Pump Bmw

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Wed, 03 Jul 2024 01:58:43 +0000

Euro byte for Secondary Air pump = 0. I like to pretend I know stuff. I was purely going off what the guide for the software in our DME says.. basically is saying if it reads that the SAP is disabled by that binary bit it changes the startup method to inject less fuel during warmup routine only. Thanks for that Danny / Jim. To get my SAP code to not be thrown on the dash anymore I did the following: This yielded me no error for SAP activation (it is unplugged and block plated off now) and I get no error after cold start for SAP. The SAP helps burn the rich mixture that is used during a cold start. 0Code:bit 7 6 5 4 3 2 1 0 +---------------+ x| CWKONABG |x +---------------+ | | | | | | | +-- B katfz | | | | | | +---- B kath | | | | | +------ B slsfz <<< defining byte for is the SLS system installed in the car | | | | +-------- | | | | +---------- | | | +------------ | | +-------------- | +---------------- |. If it is enabled then it injects more fuel during startup routine to make cats reach operating temp faster.. the really long technical looking snippet right before my inquiry is a snippet from the software data guide. Did you change the A/F on cold start? Sounds like a win/win to me. I figure I throw it on here for someone who interests in this mod. They cannot handle that much extra fuel without air on short trips, maybe it will burn off on longer runs. I actually planned on going up to the mountains this weekend hopefully its chilly enough to get a real life result from this change test to see how it impacts fuel on start in a real world application. With the normal A/F about the only negative I can think of other than possible CAT issues would be the back sides of the exhaust valves may get more carbon deposits on them.

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Long explanation below: By the bit B slsfz from CWKONABG the catalyst heating concept without / with secondary air system becomes compatible: B slsfz = | 0: no secondary air system, lean catalyst heating operation of the engine | 1: with secondary air system, rich catalyst heating operation of the engine Further possible secondary air variations are described in%SLS. Glad my LS3 doesn't have CAT's or an air pump. If you don't it will ruin the cats. This topic and associated thread explains a lot about it (for the e46 M3): When the car is started and the DME thinks the cats are cold, it will enable the SAP, inject extra fuel and retard the timing (and change some VANOS settings if applicable). Your not that far from Pikes Peak, take it up there and let it sit for a few hours and see how it starts. Some emissions issues at all? Is this PURELY for emissions purposes? Maybe some on the tops of the pistons too. OBD2 scan shows no error for SAP either meaning I could pass emissions. 1, 2 x 10" Kove audio subs, Alpine ICS X7 Headunit, 19" BBS Hammer Sports RT245/RT246, Muffler delete, electric coolant fan. So zarboz must turn off the EXTRA richness for the SAP. 5s, Sound Magus VS3500. Must also help the bigger secondary CAT's too. I simply unplug the relay to the SAP air pump.

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Please be forgiving I am not really a mechanicly minded person I work with computers all day so I get what the datasheet is saying that it aids in the warming of the catalysts via exhaust at a more rapid rate. Give it a try and report back, of course it's now getting warm so it might work pretty OK. Glad I don't have one! "0:no secondary air system, lean catalyst heating operation of the engine | 1: with secondary air system, rich catalyst heating operation of the engine ". Richer dependent on load (rl) when starting from rest and adjustment to the lean performance limit (lalgm) from%ESWL, as described in%LAMKO. Last edited by zarboz; 04-26-2019 at 07:21 PM. This heats the CAT's up quicker along with the pre-CAT O2 sensors. So in my adventures of learning how to tune my car I wanted to track down DTC definitions (I have all of them I think) and that required some testing. The base point distribution of KFLMSKH, KFLASKH is to be chosen such that the "catalyst heating idle range" is sufficiently covered with regard to engine speed and load at idle and that a steady transition by interpolation to partial load can be performed. What am I doing to my motor. Golden Gate Chapter BMW CCA Nr 62319. Switching off: No catalyst heating with MLSUS = 0 in%BBKHZ No Lambda action during lean warm-up: KFLMSKH = 1 with secondary air: MSLUB = 0 in%SLS and KFLASKH = 1. Sent from my SM-G930F using Tapatalk.

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Default selection in%ESWL such that "lalgm" does not limit lalgf during catalyst heating. Well the SAP diagnostic routine function as well as its existence impacts a few other REALLY important motor functions. 1999 540 Auto with Eaton M112 supercharger. When starting a cold engine, especially in the winter, on a leaner A/F mixture it won't run that well until it warms up. I was speculating that this richness is purely during "warmup function" which i would imagine the SAP dumps air + Gas to the cats to get them up to operating temp as fast as possible in case of a cold start emissions test? I have sufficiently coded the SAP out of the DME portion via the 64kb mapping tables myself a I have talked with a few dudes online in Russia who are familiar with our DME and all 4 of them gave me different methodologies and reasonings why the other guy was missing X function or why Y function was important to 00 out as well it was pretty easy to figure out once i had some data sheets.

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Airlift 3H/P management, M5 steering box, M5 LSD, Eibach/Dinan front and rear anti roll bars, PM Modifich door boards, 4 Eton 6. You get to lose some weight, remove a few potential sources of vacuum leaks, simplify the engine bay, and you don't have to hear a pump whining on every cold start. Last edited by 16valex; 05-03-2019 at 01:44 PM. This the kind of kit that connects to the 02 sensors I bought this simulator from a vendor here at bimmer. I also deleted my SAP using a kit I bought from here. So realistically what are you losing out on here?

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1992 525i 5-speed - Thread. Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. If you ONLY disable the SAP in the ESKONF file and make no changes to the cat heater operations the car stalls out on first cold start of the day. I have been driving with the relay removed for 4-5 years. The SAP is pretty much there to please the emissions people, that's why plenty of countries don't have em.

I don't see any cold start problems but as my car has a jag charger now and has had some fuelling changes I don't know how that has changed things. Lean warm-up: Default selection KFLMSKH with 1, 05, transition to 1, 0 resp. Zarboz, have you done this to your 540 yet? The reports are in: If you disable all the routines that check the cat heater the car turns on and runs just fine on COLD start (like 28 degrees outside).