[Saif2018]

Originally Posted by Freemorfeem

Hi, y'all, still learning how to read my logs. I'd love some insight into my Timing corrections and LPFP psi.

I've been on this journey since mid summer '21. I'm now FBO. I ran MHD v8 st 1+ for 3K mi / 3mo. Just flashed to v10 stg 2+ and ran some logs.

v8 Stg 1+ (ran for 3 months / 3K mi.) - 3 LOGS HERE
https://datazap.me/u/mmattei2gmailco...-9-10-11-12-21

v10 Stg 2+ (just flashed and ran logs) - 3 LOGS HERE
https://datazap.me/u/mmattei2gmailco...7-8-9-10-11-21

Going from 1+ to 2+ my LPFP is hanging around 46psi in the upper RPM's, whereas before it was low 50's.

The timing corrections have always been present in this engine. At stage 0 I had them. I upgraded my coils and plugs (now NGK 1step colder) in November and that didn't seem change anything. But the smoothness improved drastically & the misfires went away.

The car seems to drive very smoothly! But the data logs show timing corrections, usually in the -2 to -3 degrees, consistent across most cylinders. Every now and then I'll see -4 to -6.

My concern derives from what I read in the MHD PDF, "Corrections that seem to be random, or never happen at the same load of up -3° are deemed to be
acceptable as long as it’s not across multiple cylinders at a time."

I'm not sure what to do, especially since decreased loads and boosts still see these timing corrections. I'm pretty much stuck with 93 OCT where I'm at, too, as far as I can tell (Austin, TX).

Thanks a million!!!

V8 stage 1+ looks significantly better,

On the V10 Stage 2+ log, your HPFP and LPFP taking a nosedive up top. This isn't good. Try a less aggressive map, V10 Stage 1+ or V7 maps to see if things improve.

Your fuel pumps could be on their way out. Those corrections mostly minor but way too many.

I would have said try adding E85 to see if it's the fuel causing it, but you're fuel pressures are getting too low already.

Flash v7.1 stage 2+ log and post

[E90lmao]

Hi all, trying to chase down shaking idle and a missfire on cylinder #4. Does anyone know how to interpret this log? I'm struggling to understand why the charge to injector 4 is lower than injector 1,2,3,5 and 6. Cylinder 1 is an index 12 and cylinders 2-6 are index 10. If there's anything else I need within the log let me know and I'll do more! Thanks

https://datazap.me/u/e90lmao/log-164...25-26-27-28-29

[Saif2018]

Originally Posted by E90lmao

Hi all, trying to chase down shaking idle and a missfire on cylinder #4. Does anyone know how to interpret this log? I'm struggling to understand why the charge to injector 4 is lower than injector 1,2,3,5 and 6. Cylinder 1 is an index 12 and cylinders 2-6 are index 10. If there's anything else I need within the log let me know and I'll do more! Thanks

https://datazap.me/u/e90lmao/log-164...25-26-27-28-29

Have you swapped coils and plugs from cylinder 4 to another cylinder and checked of misfire follows?

[ash6r]

I just did a new log with the voltage knock sensors logged as well. Can't tell if its better or not. I also put the log on a virtual dyno and it said it was making 241whp on the 135i N54 18s Manual profile. I thought it would be around 260whp stock? I guess over 10 years it would lose around 20hp. I also have NGK 97968 plugs but not sure to put them in cos they might be fake lol.

https://datazap.me/u/ashe82/n54-135i...?log=0&data=13

[Freemorfeem]

Originally Posted by Saif2018

V8 stage 1+ looks significantly better,

On the V10 Stage 2+ log, your HPFP and LPFP taking a nosedive up top. This isn't good. Try a less aggressive map, V10 Stage 1+ or V7 maps to see if things improve.

Your fuel pumps could be on their way out. Those corrections mostly minor but way too many.

I would have said try adding E85 to see if it's the fuel causing it, but you're fuel pressures are getting too low already.

Flash v7.1 stage 2+ log and post

Ok Saif2018, I've got some logs. v10 1+. Didn't try v7 yet, though.

LPFP is strained less than 2+ but still not great.

MHD v10 stg 1+ (LPFP down to 47psi)
https://datazap.me/u/mmattei2gmailco...ata=3-12-13-21

MHD v10 stg 1+ (LPFP down to 44psi)
https://datazap.me/u/mmattei2gmailco...ata=3-12-13-21

MHD v10 stg 1+ (LPFP doing some odd roller coaster moves)
https://datazap.me/u/mmattei2gmailco...ata=3-12-13-21

I'm getting leery of running tons of WOT logs to test this because I'd like to avoid a big malfunction and ride this out until the weather warms up and I can just get a stage2 LPFP.

I'd love to see a log of a healthy LPFP. Do they pump with a rise and fall action like my third log here, or do they start strong and stay strong, or do they dip a little on the upper end as mine are showing in the first logs posted here.

so many questions... so much left to learn...

[Saif2018]

Originally Posted by Freemorfeem

Ok Saif2018, I've got some logs. v10 1+. Didn't try v7 yet, though.

LPFP is strained less than 2+ but still not great.

MHD v10 stg 1+ (LPFP down to 47psi)
https://datazap.me/u/mmattei2gmailco...ata=3-12-13-21

MHD v10 stg 1+ (LPFP down to 44psi)
https://datazap.me/u/mmattei2gmailco...ata=3-12-13-21

MHD v10 stg 1+ (LPFP doing some odd roller coaster moves)
https://datazap.me/u/mmattei2gmailco...ata=3-12-13-21

I'm getting leery of running tons of WOT logs to test this because I'd like to avoid a big malfunction and ride this out until the weather warms up and I can just get a stage2 LPFP.

I'd love to see a log of a healthy LPFP. Do they pump with a rise and fall action like my third log here, or do they start strong and stay strong, or do they dip a little on the upper end as mine are showing in the first logs posted here.

so many questions... so much left to learn...

LPFP pressures will vary, that's normal, 3rd log LPFP is fine, it drops to about 55psi

As long as it doesn't drop below 50psi should be fine.

Yeah you could upgrade your LPFP

[Freemorfeem]

Originally Posted by Saif2018

LPFP pressures will vary, that's normal, 3rd log LPFP is fine, it drops to about 55psi

As long as it doesn't drop below 50psi should be fine.

Yeah you could upgrade your LPFP

It is dropping below 50psi.

In the logs you've seen do the psi values start high and decrease through the pull or do you also see some of what I had on one of those pulls where the pump is rising and falling like 91 - 65, 85 - 55, 70 - 60, 80 - 60, etc.

Going back to my earliest logs when I bought the car in 07/21. The only time the LPFP remained above 55psi consistently is when it was stock. The v10 2+ added a couple psi of added strain, but otherwise even v8 st1 gave it these drops below 50psi.

[Saif2018]

Originally Posted by Freemorfeem

It is dropping below 50psi.

In the logs you've seen do the psi values start high and decrease through the pull or do you also see some of what I had on one of those pulls where the pump is rising and falling like 91 - 65, 85 - 55, 70 - 60, 80 - 60, etc.

Going back to my earliest logs when I bought the car in 07/21. The only time the LPFP remained above 55psi consistently is when it was stock. The v10 2+ added a couple psi of added strain, but otherwise even v8 st1 gave it these drops below 50psi.

Here's mine before Index 12 and VC install, on a custom tune

https://datazap.me/u/shelim2020/v51?log=0&data=3-4-11-23

[ash6r]

Originally Posted by Saif2018

Here's mine before Index 12 and VC install, on a custom tune

https://datazap.me/u/shelim2020/v51?...data=3-4-11-23

Does the HPFP increase with RPM because of your custom tune? Or is that meant to be normal for stock as well?

[Freemorfeem]

Originally Posted by Saif2018

Here's mine before Index 12 and VC install, on a custom tune

https://datazap.me/u/shelim2020/v51?...data=3-4-11-23

That's nice looking log. 20psi, hell yeah! Is it a custom Tune? Looks like it.

Seeing how that healthy LPFP is pumping is helpful to see.

Is that an automatic transmission? Those shifts are insane. I'm 6MT.

[Saif2018]

Originally Posted by Freemorfeem

That's nice looking log. 20psi, hell yeah! Is it a custom Tune? Looks like it.

Seeing how that healthy LPFP is pumping is helpful to see.

Is that an automatic transmission? Those shifts are insane. I'm 6MT.

Yes it's on a custom tune V6 map now, just haven't had the time to Datalog yet, turbos whining but still boosting fine at the moment.

ZF6 auto gearbox with XHP stage 3, I've since had my leaking Index 1's replaced with new Index 12 injectors, leaking / cracked Valve Cover replaced, Bilstein B12 pro kit plus control arms, bushes replaced.

[Saif2018]

Originally Posted by ash6r

Does the HPFP increase with RPM because of your custom tune? Or is that meant to be normal for stock as well?

I think it's probably to due with the custom tune as the timing is pretty low on my custom map but boost is high, but as long as your HPFP is above 1500psi I wouldn't worry about it.

Previous OTS maps had HPFP dropping to about 1800psi lowest,

[Lalo_D23]

Can anyone take a look at my log? The car is FBO with an e30 tune from MHD. Thank you.

https://datazap.me/u/lalod23/log-164...2?log=0&data=3

[Saif2018]

Originally Posted by Lalo_D23

Can anyone take a look at my log? The car is FBO with an e30 tune from MHD. Thank you.

https://datazap.me/u/lalod23/log-164...2?log=0&data=3

Looks like you have a pretty bad boost leak, your boost Psi is way off target and WGDC never drops below 76% rises to 80%+

[Lalo_D23]

Originally Posted by Saif2018

Looks like you have a pretty bad boost leak, your boost Psi is way off target and WGDC never drops below 76% rises to 80%+

I figured, I've also been having issues recently when running on the e30 tune. I think my HPFP is on its way out. I will look around for the leak, thank you. Would you or anyone else look at my log without e85? This was on a stage 2+ tune.

https://datazap.me/u/lalod23/log-164...og=0&data=3-11

[Saif2018]

Originally Posted by Lalo_D23

I figured, I've also been having issues recently when running on the e30 tune. I think my HPFP is on its way out. I will look around for the leak, thank you. Would you or anyone else look at my log without e85? This was on a stage 2+ tune.

https://datazap.me/u/lalod23/log-164...og=0&data=3-11

Your Rail pressure aka High Pressure Fuel Pump looks healthy as it's well over 2000+psi in the log above and in the E30 log. Don't forget to log Low pressure fuel pump though,

It's the LPFP that begins to struggle with E85, typically E30+ but depends on how healthy the condition is,

Have a read through this, you need to eliminate causes of boost leak, (even if you don't have 30FF code)

https://bmwtuning.co/bmw-n54-30ff-en...-repair-guide/

[Lalo_D23]

Originally Posted by Saif2018

Your Rail pressure aka High Pressure Fuel Pump looks healthy as it's well over 2000+psi in the log above and in the E30 log. Don't forget to log Low pressure fuel pump though,

It's the LPFP that begins to struggle with E85, typically E30+ but depends on how healthy the condition is,

Have a read through this, you need to eliminate causes of boost leak, (even if you don't have 30FF code)

https://bmwtuning.co/bmw-n54-30ff-en...-repair-guide/

Okay that's helpful. For some reason MHD doesn't give me the option to log the LPFP, what is it under? The pump is OEM I assume since I haven't changed it, car has 87k miles. I appreciate the help seriously.

[Saif2018]

Originally Posted by Lalo_D23

Okay that's helpful. For some reason MHD doesn't give me the option to log the LPFP, what is it under? The pump is OEM I assume since I haven't changed it, car has 87k miles. I appreciate the help seriously.

If you have N55 engine, it doesn't have LPFP sensor, so won't be able to read low pressure fuel pump level

[mattypp]

Would anyone mind taking a look at my log? I recently picked the car up and I wanted to do a health check on it. The one odd thing is the throtte. It had dips in it even though I was WOT. I'd love to get any input! thank you

08 335xi bone stock

https://datazap.me/u/matthew-pinola/...0&data=3-22-23

[Saif2018]

Originally Posted by mattypp

Would anyone mind taking a look at my log? I recently picked the car up and I wanted to do a health check on it. The one odd thing is the throtte. It had dips in it even though I was WOT. I'd love to get any input! thank you

08 335xi bone stock

https://datazap.me/u/matthew-pinola/...0&data=3-22-23

Throttle dips are normal, DME pulls throttle when overboosting occurs. If you look at the instances where the throttle dips you had some overboosting. (Boost Psi was slightly above Boost target)

Log looks fine, can't see anything wrong. Make sure to log WGDC bank 1 next time you log.

[Lalo_D23]

Originally Posted by Saif2018

If you have N55 engine, it doesn't have LPFP sensor, so won't be able to read low pressure fuel pump level

Yes it's N55. Okay that's good to know thank you. Would you recommend to upgrade the LPFP just in case? I plan on running more ethanol in the future.

[Saif2018]

Originally Posted by Lalo_D23

Yes it's N55. Okay that's good to know thank you. Would you recommend to upgrade the LPFP just in case? I plan on running more ethanol in the future.

Definitely.