[thormessiah]

Originally Posted by dpaul

There is almost no question you have something interfering with communication on the BSD bus. My point is why pick on "IBS missing"? It could be any of the other components. I'd disconnect components on the BSD bus one at a time and see if the communication codes for the other bus components are eliminated. That might tell me which component was flaky and was bringing down the bus. Then I'd replace that component. Of course it could be a wiring problem, not a component problem, which could be difficult to trace. This stuff is not easy.

But as I said, a bad BSD bus won't bring down the fuel pump, give you long cranks or light up your dash and cause the car to stop running.

The more pressing issue is why did your HPFP suddenly go away as it did in your log. Was that related to a more general electrical problem or was it simply an HPFP or rail pressure sensor problem (latter is built in the pump so pump replacement is required in both cases)? There aren't any other codes suggesting general electrical issues other than relating to the BSD and there aren't any codes relating to fueling.

You did report a problem with long cranks, which I assume means you press the start button and the engine cranks but doesn't start for a period of at least several seconds. If so, that is consistent with an HPFP problem. However, HPFPs don't usually fail stone dead the way yours did then act find the next minute. They usually degrade i.e. take longer and longer to get up to pressure and/or struggle to maintain normal pressures.

So I really don't know what's up with you car. It's going to require a lot of thinking.

I'd read the freeze frame associated with the 29E7 code and see what voltage was being measured when the code was set. You can even set the MHD to record it

What I believe happened is that the voltage cut off to the HPFP right after I got the battery warning on the dash. I did not get a reduced power light, but I wasn't pushing the car at that point. I'll be taking it to the shop tomorrow for sure, but besides the electrical issues is there something else you see with the logs I should be aware of? Plugs and coils are about 10K miles old, Bosch and Delphi. Injectors are index 8 though.

[dpaul]

Originally Posted by thormessiah

What I believe happened is that the voltage cut off to the HPFP right after I got the battery warning on the dash. I did not get a reduced power light, but I wasn't pushing the car at that point. I'll be taking it to the shop tomorrow for sure, but besides the electrical issues is there something else you see with the logs I should be aware of? Plugs and coils are about 10K miles old, Bosch and Delphi. Injectors are index 8 though.

Pretty peculiar - I don't know how you can get a rail pressure down to 500psi and not have a check engine light and a code. Have you got other codes you haven't told us about? Have you tried clearing and then doing some pulls to see what comes back?

There are so many things wrong in the log it is hard to predict what is primary and what is secondary to some other problem. The only way I can think to proceed is to start with the codes - there's a BSD bus issue, start with that. You'd get misfire codes if you had issues with plugs, coils or injectors.

[erzenble]

Hey has anyone seen boost do this before??? its going up down up down on every run. its like a roller coaster lol.

Have ruled out boost leaks, new boost solenoid, new vacuum lines

Checked if waste gate moves in and out. It doesn't move till 4 inhg then it maxes out at 8 inhg.
also checked vacuum at idle down at the waste gate and it stays at 8inhg. Thats with MHD reading 35 pcnt WGDC.

This is an N55 btw. not sure if vacuum is different on an N55.

https://datazap.me/u/erzenble/log-af....89&tmax=98.84

[Fallenangel123]

Hi guys,

Could someone please take a look at my log here:
MHD Stage 1+ V8

https://datazap.me/u/fallenangel123/...10-12-13-21-22

Thanks

[KrazyKiwi]

Is my stock 335i building boost alright?

https://datazap.me/u/krazykiwi/log-1...=0&data=3-4-21

[type-dRew]

Originally Posted by KrazyKiwi

Is my stock 335i building boost alright?

https://datazap.me/u/krazykiwi/log-1...=0&data=3-4-21

Looks good to me

[CarAbuser]

Originally Posted by Fallenangel123

Hi guys,

Could someone please take a look at my log here:
MHD Stage 1+ V8

https://datazap.me/u/fallenangel123/...10-12-13-21-22

Thanks

You're over boosting in the higher RPM range which is causing throttle closures. You are also getting a torque limit active during the shift which is messing with your timing.

Your IATs are too high, you should think about upgrading the intercooler.

Nothing to lose sleep over but maybe worth contacting MHD about since I suspect the over boost and shift limiter are caused by map issues. You could try using the older map revisions and see if it fixes your issues, personally from looking at peoples logs I think the V8 maps are a step backwards.

[type-dRew]

Originally Posted by CarAbuser

You're over boosting in the higher RPM range which is causing throttle closures. You are also getting a torque limit active during the shift which is messing with your timing.

Your IATs are too high, you should think about upgrading the intercooler.

Nothing to lose sleep over but maybe worth contacting MHD about since I suspect the over boost and shift limiter are caused by map issues. You could try using the older map revisions and see if it fixes your issues, personally from looking at peoples logs I think the V8 maps are a step backwards.

All v8 maps overshoot target and cause throttle closures. v7 normally has trouble meeting target and v8 overshoots them. Its my understanding they did this to help people hit targets with aging vehicles and hardware.

I also prefer the v7 maps. Maybe if they ever come out of beta they will improve.

[CarAbuser]

Originally Posted by type-dRew

All v8 maps overshoot target and cause throttle closures. v7 normally has trouble meeting target and v8 overshoots them. Its my understanding they did this to help people hit targets with aging vehicles and hardware.

I also prefer the v7 maps. Maybe if they ever come out of beta they will improve.

I'm not sure what Wedge was trying to do with V8. It doesn't even look like the PID is doing anything, just controlling everything using base values.

I think the best way forward for most people might be to use the RFT maps. The RFP maps aren't perfect at all but with proper values in the boost limit multiplier table (rather than just setting everything to 3.0) they start to make more sense than these OTS maps from MHD.

[type-dRew]

Originally Posted by CarAbuser

I'm not sure what Wedge was trying to do with V8. It doesn't even look like the PID is doing anything, just controlling everything using base values.

I think the best way forward for most people might be to use the RFT maps. The RFP maps aren't perfect at all but with proper values in the boost limit multiplier table (rather than just setting everything to 3.0) they start to make more sense than these OTS maps from MHD.

I've ran rfp maps and found them to drive great. Not much performance over mhd, but there is a difference. On top of that you can modify them if you like since they are unlocked which is nice.

[Fallenangel123]

Originally Posted by type-dRew

I've ran rfp maps and found them to drive great. Not much performance over mhd, but there is a difference. On top of that you can modify them if you like since they are unlocked which is nice.

Are RFP maps OTS or custom? Where can they be obtained from

[type-dRew]

Originally Posted by Fallenangel123

Are RFP maps OTS or custom? Where can they be obtained from

https://rfptuning.com/

They are OTS but he offers custom tuning just like everyone else.

[mblf]

Hey guys, please take a look at my first public log:
https://datazap.me/u/crisper/log-156...og=0&data=3-20

335is with about 90k miles, just installed DPs and DVs, otherwise stock. (fmic going in soon). Running 2+ right now but will very likely go back to 1+.

Thanks!

[strmix]

New car and first log ever.
N54 335IA

Mods

• CP
  FMIC
  RFP Stage 1.5

Is that peak normal after gearshift from 3 to 4?

https://datazap.me/u/strmix/rfp-stag....10&tmax=57.45

[dpaul]

The 3-4 bump is not a problem.

I admit I haven't had much experience with RFP maps so maybe @type-dRew could comment.

However, you're not meeting boost targets and you really need a better intercooler

[nicky dj]

Car has been running a little weak. My IAT's are rising above 140 so I'm going to upgrade to the VRSF intercooler from the Mishimoto eventually. I'm just not understanding why I'm getting so many timing corrections when I JUST replaced my plugs with NGK 2-step colder gapped at .22

Anywho here's my log. any input is appreciated:

https://datazap.me/u/nick-mehlert/lo...-5-7-8-9-10-22

[F32Spawn]

08 335i 115k miles

First MHD log stage 1+ 93oct v7 map

https://datazap.me/u/kam335i/1st-pul...og=0&data=2-16

Any input welcomed

[dpaul]

Originally Posted by nicky dj

Car has been running a little weak. My IAT's are rising above 140 so I'm going to upgrade to the VRSF intercooler from the Mishimoto eventually. I'm just not understanding why I'm getting so many timing corrections when I JUST replaced my plugs with NGK 2-step colder gapped at .22

Anywho here's my log. any input is appreciated:

https://datazap.me/u/nick-mehlert/lo...-5-7-8-9-10-22

This log only goes to 3500rpm. Your IAT, unsurprisingly, is steady at 115 from start to finish. You'll have to make a better log. Start with this: get to 2500 rpm in 3rd, go to full throttle until above 6200, release throttle completely.

[nicky dj]

Originally Posted by dpaul

This log only goes to 3500rpm. Your IAT, unsurprisingly, is steady at 115 from start to finish. You'll have to make a better log. Start with this: get to 2500 rpm in 3rd, go to full throttle until above 6200, release throttle completely.

Sorry mate. Posted the wrong link/log:

https://datazap.me/u/nick-mehlert/lo...=6&mark=76

[type-dRew]

Yeah thats a lot of corrections, your IAT rise isn't great but its also only gaining about 25 degrees over where you start. Again not great, but starting the log so hot could be the reason for the corrections.

Really just need to blend in a few gallons of ethanol and see if they go away. If they do its not spark plug/coil related and its octane related. Which could mean the OTS maps just dont like your car or you have other hardware issues to address. Walnut blast ever or recently?

[nicky dj]

Originally Posted by type-dRew

Yeah thats a lot of corrections, your IAT rise isn't great but its also only gaining about 25 degrees over where you start. Again not great, but starting the log so hot could be the reason for the corrections.

Really just need to blend in a few gallons of ethanol and see if they go away. If they do its not spark plug/coil related and its octane related. Which could mean the OTS maps just dont like your car or you have other hardware issues to address. Walnut blast ever or recently?

Thanks d, yeah that makes sense, I did do a few pulls before I did the log. The car feels like it loves the OTS ethanol maps, I'll have to do a log once I get e85 in the tank again. Did a walnut blast recently and all maintenance other than a minor real main seal leak is up to date. Definitely need to get a bigger intercooler than the Mishimoto.

[BM335M]

Dyno pull log from my MHD Stage 2+ E30 map and with E30 fuel mix resulting in 375hp on a very conservative dyno down under. Getting few timing corrections after 5000rpm due to IAT possibly.

Plugs Bosch OEM
Coils Eldor
VRSF DPS
Wagner Evo 1 IC

https://datazap.me/u/mircebob/dyno-p...-6-7-8-9-10-21