Help with timing corrections

ThatKidDavid · 07-15-2017, 09:15 PM

Hey guys I have a 135i and I've been having the worst time trying to get rid of my timing corrections. Daily driving I'll have times where I get -8 in cylinder 6 while the others are around -5. I've researched from here and heard in general any more correction then -3 is something that should be looked into. Car not throwing any codes btw

Car has 85k miles
Maintenance done:
Coil packs 83k
Transmission fluid 79k
Diff fluid 79k
Oil change 79k
HPFP 76k
Spark plugs 74k

Mods include
MHD (stage 0 to daily drive)
Dp
3" axle back
Chargepipe
Occ

I know the next thing on the list is injectors but that being an expensive purchase I wanted to elimate all other variables, is there anything I should try to replace before I go that route? And also if I replace the injectors and the corrections are still what should I do?

ssgtcarroll · 07-16-2017, 08:46 PM

What index injectors are you using? If you look around enough there's someone who sells new 12s for 650.

ThatKidDavid · 07-27-2017, 12:39 AM

Recently fixed an exhaust leak, if anyone can check out my logs and provide me any insight that would be greatly appreciated

http://datazap.me/u/imdavidbitch/exhaust-leak-fixed?log=0&data=3-12

Quote:

Originally Posted by ssgtcarroll

What index injectors are you using? If you look around enough there's someone who sells new 12s for 650.

I don't know what index I currently have, most likely stock. If I do end up changing them I'll def change all 6
-ps I would be be very interested in hearing more about that mysterious person of yours

ThatKidDavid · 07-29-2017, 01:15 PM

Anyone? The above link has 2 datalogs, is it safe to go to stage 2 OTS?

The Wind Breezes · 07-29-2017, 03:02 PM

Wait, why would you put the flash in stage 0 for daily driving? It won't be any harder on the car until you demand a heavy acceleration. Even then, the power is very safe for any car in good running condition. Which yours is not quite in.

So don't run more power until you get this sorted out. You're still pulling too much timing for a stock map. Yes the ECU will save the motor from detonation by pulling timing instantly but this has the side effect of raising EGT for the affected cylinders, which is actually bad for your engine, unlike running MHD's fuel-appropriate flash.

I don't know what could cause this. It's interesting that your middle cylinders don't pull timing but everything else tends to. Maybe you have a knock sensor issue. Or it's remotely possible the injectors are involved, but since it's so many cylinders and you're N55 that would seem unlikely.

07-15-2017, 09:15 PM	#1
ThatKidDavid Member 23 Rep 98 Posts Drives: 2011 135i Join Date: Sep 2015 Location: Chino Hills, CA iTrader: (0)	Help with timing corrections Hey guys I have a 135i and I've been having the worst time trying to get rid of my timing corrections. Daily driving I'll have times where I get -8 in cylinder 6 while the others are around -5. I've researched from here and heard in general any more correction then -3 is something that should be looked into. Car not throwing any codes btw Car has 85k miles Maintenance done: Coil packs 83k Transmission fluid 79k Diff fluid 79k Oil change 79k HPFP 76k Spark plugs 74k Mods include MHD (stage 0 to daily drive) Dp 3" axle back Chargepipe Occ I know the next thing on the list is injectors but that being an expensive purchase I wanted to elimate all other variables, is there anything I should try to replace before I go that route? And also if I replace the injectors and the corrections are still what should I do? __________________ Current: 2018 M3 RIP: 2013 M6 Individual 1 of 2 750whp RIP: Bagged & Boosted 135i FBO PS2 RIP: Stanced RSX-S https://www.clubrsx.com/threads/slam...entftl.851394/
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07-16-2017, 08:46 PM	#2
ssgtcarroll Enlisted Member 8 Rep 49 Posts Drives: 08 135I Join Date: Jul 2015 Location: York, PA iTrader: (0)	What index injectors are you using? If you look around enough there's someone who sells new 12s for 650.
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07-29-2017, 01:15 PM	#4
ThatKidDavid Member 23 Rep 98 Posts Drives: 2011 135i Join Date: Sep 2015 Location: Chino Hills, CA iTrader: (0)	Anyone? The above link has 2 datalogs, is it safe to go to stage 2 OTS? __________________ Current: 2018 M3 RIP: 2013 M6 Individual 1 of 2 750whp RIP: Bagged & Boosted 135i FBO PS2 RIP: Stanced RSX-S https://www.clubrsx.com/threads/slam...entftl.851394/
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07-29-2017, 03:02 PM	#5
The Wind Breezes Lieutenant Colonel 912 Rep 1,850 Posts Drives: 135i N55 DCT Join Date: Apr 2015 Location: USA iTrader: (0)	Wait, why would you put the flash in stage 0 for daily driving? It won't be any harder on the car until you demand a heavy acceleration. Even then, the power is very safe for any car in good running condition. Which yours is not quite in. So don't run more power until you get this sorted out. You're still pulling too much timing for a stock map. Yes the ECU will save the motor from detonation by pulling timing instantly but this has the side effect of raising EGT for the affected cylinders, which is actually bad for your engine, unlike running MHD's fuel-appropriate flash. I don't know what could cause this. It's interesting that your middle cylinders don't pull timing but everything else tends to. Maybe you have a knock sensor issue. Or it's remotely possible the injectors are involved, but since it's so many cylinders and you're N55 that would seem unlikely.
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