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. Euro byte for Secondary Air pump = 0. Long explanation below the TLDR is here: MSLUB and MSLBAS are expected return values for the SAP pump CWKONABG tells the car that the SAP is not installed and to treat the kats differently the CLA* items silence the check engine light because the pump is unplugged. Your not that far from Pikes Peak, take it up there and let it sit for a few hours and see how it starts. Well I did the SAP delete on my 97-528 using a kit from someone here. Is this PURELY for emissions purposes? Cold startup fuel enrichment is separate from Cat-preheating enrichment. It has been working flawlessly for 4 years now. Some emissions issues at all? 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. Secondary air pump delete e44.com. CWKONABG Altering from 5>1 is required (Explanation below). Well the SAP diagnostic routine function as well as its existence impacts a few other REALLY important motor functions.
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Takes a little extra key turn to get her on. 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. Default selection in%ESWL such that "lalgm" does not limit lalgf during catalyst heating. Secondary air pump delete e46 air. Or Lambda engine default selection by code word CWSLS in%SLS analogues to lean warm-up.
Did you change the A/F on cold start? Airlift 3H/P management, M5 steering box, M5 LSD, Eibach/Dinan front and rear anti roll bars, PM Modifich door boards, 4 Eton 6. 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). Codeword for secondary air system. OK so you're probably wondering whats going on right? Secondary air pump delete e46 kit. I also deleted my SAP using a kit I bought from here. 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. I simply unplug the relay to the SAP air pump. What am I doing to my motor.
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Must also help the bigger secondary CAT's too. Sounds like a win/win to me. Rich warm-up: Default selection KFLASKH with 1, 1 to 1, 2, transition to > 1, 3 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. 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.
Sent from my SM-G930F using Tapatalk. 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. The goal is to get the cats to work ASAP. I was more just curious what negatives I am looking at other than emissions and slower catlyst warming on cold start due to leaner fuel conditions. 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. SO I had to 00 out other items in order to get the SAP system to truly be "deleted" from the cars ecu functions.
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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. 1992 525i 5-speed - Thread. Richer dependent on load (rl) when starting from rest and adjustment to the lean performance limit (lalgm) from%ESWL, as described in%LAMKO. There's no real harm in deleting it if you block it off properly and code it out correctly (which plenty of reputable tuners like DUDMD will do as part of a tune). 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. This heats the CAT's up quicker along with the pre-CAT O2 sensors. Yes, it's an emission thing. 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 | | | | +-------- | | | | +---------- | | | +------------ | | +-------------- | +---------------- |. Glad my LS3 doesn't have CAT's or an air pump. Some catalyst warming function during cold start. Glad I don't have one! 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.
The SAP helps burn the rich mixture that is used during a cold start. 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. Maybe some on the tops of the pistons too. I figure I throw it on here for someone who interests in this mod. I like to pretend I know stuff. The SAP interacts with lambda tables and timers as well as interacting with catalyst heaters and heating function. 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. Merely unplugging the SAP and blocking it off is an option and would yield a check engine light amongst a few other problems that are not as aparrent until the functions of the DME are described. NO cel no nothing, quiet as a mouse. So realistically what are you losing out on here?
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