RomRaider

hi, i have a knock retard problem and havent found a topic that can help me, hoping someone can put me in the right direction, i have an e36 328i m50 intake ms41.1, since the first time datalogging the stock map i found on the adaptation tables some knock between 4.000 to 5.000rpm, from 2 to 4 grades around the engine load table, i put 95 octane and it decreasses but not by much, i put timing in the other ranges and i see a huge difference in NM without any knock, coil packs and sparks are in good condition, maybe the rubber on the coils is a little cracked but nothing big. i also tuned vanos watching pazi and KNeuer, tuned it to turn off at 4.300, it takes 200 rpms to fully enter, same knock, only code i have is 68 because i deleted the pcv valve and put an oil catcher can, i would really appreciate if someone can tell me how can i addres that knock retard problem, or maybe give me a old topic with, im learning a lot here but havent found the answer for that, thanks

basically same answer if gave in my previous post

there is many things that can cause false knock signals. single mass flywheel is one of them, also worn out engine trans mounts, exhaust touching body or anything loose.. if all those check out ok, then maybe try to relax the knock tables (at ur own risk). also, verify that afr is not too lean. also carbon deposits in combustion chamber can cause knock, do a anticarbon treatment. if everything is mechanically sound, only then try to increase ign timing. here also i would run 98 octan minimum.

Hello

I also have M52B28 (528i) with only M50 Manifold Mod and wanna tune my Setup, but ecounter Knock an Stock fuel map.
Vanos setpoint is already tuned and Ignition is Stock.
i tried adding fuel according to STFT but still have Knock on Stock timing.
tried adjusting Fuel and got suspicious of faulty Lambdaprobes - Got frustrated and just flashed a Fuel Map with +50% on stock Table just so the Engine would stock Knocking.

Didn't Stop Knocking.

Saw your Thread and i checked for anything touching the Engine or Exhaust or anything that could fake Knock - found nothing.

inspected the my last longer Log with 150% Fuelmap and it doesn't seem to me like it's a fake Knock but admitted i don't know what would indicate that.


The Question is:
Can you tell by the Log if its false Knocking?
And if so, what does it look like? How can i tell?


i added my Log to this post if someone wants to take a look at it

Nevermind, found my first Full and Partial Read i ever did on this DME and flashed it on it as is.
I had a different one flashed and referred to it as Stock because i did a Engine swap and instead of Changing the DME physically i just did full and partial reads and flashed them onto my DME as the Swap finished

Knocks went away almost completely with real Stock Maps, couldn't find any differences between the two thou, so maybe its because of ID Numbers differences or something like that???

i guess the leftover fake Knocks come from either the M50 manifold and too lean fuel condition due to the DME not having adapted to it yet, or that my Flywheel is going bad.

Bad 2-Mass-Flywheel can but don't have to be diagnosed via RPM depending sound from Clutch area that stops as soon as you press the Clutch Pedal. My Throw out Bearing was changed while doing the Swap (November 2023)

These are just assumptions and may be wrong, please correct me if so, we all are here to learn

Maybe this can help someone with similar Problems BUT definitely shows us to keep untouched Backups of the first Reads we ever did on our Machines.