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Originally Posted by Will_460cs
NOX Problems:
So injectors are fixed/ok, now on to NOX problems:
Firstly check if you car runs stratified, if it does and does so reliably then all is good.
Checking to see if your car runs stratified: https://bimmerprofs.com/n43n53-operation-modes-check/
This is also the reason why you may have a sooty exhaust, because you maybe are stuck in Homogen mode which is essentially a LIMP mode with over-fuelling.
If you car doesn't run stratified its probably down to faulty NOX sensor or NOX cat (an ageing Cat is the common on >80k), Check for NOX errors in INPA.
If you see NOX CAT Ageing then you NOX Cat is at the end of useful life circa 80K.
Your OPTIONS:
So you have a car with Less than 80K miles:
1. New BMW Nox sensor about £400
2. Replacement NOX probe 8 wire from the NOX shop £160 https://www.nox-sensor.shop/shop/nox...uct-6697701859
More than 80k miles, I don't want to worry about my NOX cat Ageing issues now or in the future:
3. Bimmerproffs NOXEM emulated about £320, great if you car has 80K miles+ and/or you want to work regardless of the ageing of NOX CAT
I'd like my 325i to be more powerful and I'd rather not worry about NOX system like Bimmerproffs solution:
4. Remap of 325i or 330I with NOX coded out £250, Maptech and ProMap, if you have a 325I this will make a big performance gain i.e. 265BHP and 45NM increase http://www.map-tech.co.uk/your-car.htm?car=674
Personally I'd recommend option 4, I used Maptech.. |
I have just fixed my rough idle/running issues by replacing all 6 injectors.
I have reset all adaptations, followed bimmerprofs tutorials to redo them.
I still get the 30E9 nox cat ageing error, and the engine does not perform in Stratified charge mode.
I have gotten in touch with one of the Map Tech guys, explained them what I am getting and they said, I quote
Quote:
The NOx sensor Delete is an extra step on top of the stage 1 remap, but can be done, but you would also need to remove the 2ndary NOx cats from the exhaust system (leaving the primary cats if you prefer).
If you think your NOx cats are problematic I would say you should also remove the NOx cats themselves? deleting the NOx sensors won’t do anything to fix the physical cats themselves.
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I am curious, did option 4 that you mentioned completely resolve this issue just by remapping and coding out the nox sensor? Or did you have something extra done to yours as the guys suggested?