[Cytoplasm0671]

Originally Posted by Cytoplasm0671

Tune: BM3 OTS Stage 1 E30 map
Mix: E38 using 93-octane Shell gas (see log flexfuel sensor)
Equipment: Active Autowerke downpipe, TU HPFP, Pennzoil Plat Euro 5w40 oil, new NGK plugs (stock gapped)

Have had engine knock at low-RPM in the past. On advice of this forum am running E38 on the E30 tune to try and clear up the knock.

2 logs still have engine knock

Log 1: https://www.bootmod3.net/log?id=662f...7ee711b7e3d41b

Log 2 (knock): https://www.bootmod3.net/log?id=662f...7ee711b7e3d47a

Log 3 (knock): https://www.bootmod3.net/log?id=662f...a8bf21c558e861

Log 4: https://www.bootmod3.net/log?id=662f...a8bf21c558e869

Any ideas what to try next?

**EDIT**

I think it might be something on cylinder 5. For both knock logs, it seems cylinder 5 that is knocking. Also see this E30 Stage 1 Map w/E43 from September: https://www.bootmod3.net/log?id=6502...90c6120936bbcd this Stage 2 map: https://www.bootmod3.net/log?id=6502...0b435ca6e0a8cc and this Stage 2+ map: https://www.bootmod3.net/log?id=6502...729b152462c3f5

It is always cylinder 5 that is most affected. Already replaced plugs so it might be time for some new coils or injectors? Anyone have any thoughts?

Any thoughts? Does cylinder 5 also look like the leading problem to others? Should I replace the coils and see if that helps?

[Michalt]

Originally Posted by DieselDuck

Not looking the best, looks like low quality gas. Try some premium fuels like Total or Shell and see if it improves. If not you could flash the 95 ron map.

Now I changed to 95 ron map

https://datazap.me/u/black340i/log-1...?log=0&data=22

[DieselDuck]

Originally Posted by Michalt

Now I changed to 95 ron map

https://datazap.me/u/black340i/log-1...?log=0&data=22

Looking lovely! Your car is much, much happier now and you're probably not even making less power as at least your timing profile is better.

[Michalt]

Originally Posted by DieselDuck

Looking lovely! Your car is much, much happier now and you're probably not even making less power as at least your timing profile is better.

Thanks buddy!
I need to check other fuel ron98 for sure or ron100 to map ron98.

[SimonO]

Originally Posted by WrxToBeamerGuy

Timing does not look okay. I would try another gas station, adding ethanol, or flashing a lower map.

Did another run on the 95 map but with 99 fuel. Generally things look cleaner now with considerably less corrections. I'll try different fuel next time I fill up.

https://datazap.me/u/simonocr/020524...35-36-37-38-39


Thanks

[WrxToBeamerGuy]

Originally Posted by SimonO

Did another run on the 95 map but with 99 fuel. Generally things look cleaner now with considerably less corrections. I'll try different fuel next time I fill up.

https://datazap.me/u/simonocr/020524...35-36-37-38-39


Thanks

Yes this to me is perfect timing as the corrections are so minor.

[Polyhedr0n]

Did my first pull using 91 OTS MHD.. Bad Costco gas?

https://datazap.me/u/polyhedron/0503...23-24-25-26-27

[DieselDuck]

Originally Posted by Polyhedr0n

Did my first pull using 91 OTS MHD.. Bad Costco gas?

https://datazap.me/u/polyhedron/0503...23-24-25-26-27

my goodness that is bad what is wrong with your guys fuel haha

[Polyhedr0n]

Originally Posted by DieselDuck

my goodness that is bad what is wrong with your guys fuel haha

Guess I have to live with it. Cost of saying in California. Will try Chevron E25 mix next time.

[WrxToBeamerGuy]

Originally Posted by Polyhedr0n

Guess I have to live with it. Cost of saying in California. Will try Chevron E25 mix next time.

Youre in california though you should always use a gas station where you can mix in some E because why not

[BryanB58]

https://datazap.me/u/elb58/4th-%E2%9...35-36-37-39-66
anybody can take a look?
california 91 mixed with E85

[BryanB58]

Originally Posted by Skyhigh

Used to happen up to 4 out of 5 times with the black MHD adapter! It was absolutely terrible as most of my logs were unusable!
Tried with a second one - same/similar thing.
Since I moved to the MHD Universal one - the problem disappeared completely.

The mhd universal is the red one right. I will definitely order that one cause it used to be fine but recently has really been cutting out smh everytime i think i hit a perfect log i check and see cuts out between 4k and 6k rpm

[Skyhigh]

Yes, the red semi-transparent one

[WrxToBeamerGuy]

Originally Posted by BryanB58

https://datazap.me/u/elb58/4th-%E2%9...35-36-37-39-66
anybody can take a look?
california 91 mixed with E85

I dont love the timing corrections up top. When you shift into the next gear do they disappear or get worse?