[FirstBMWLA]

I recently had my ECU replaced at the dealer on my 2007 335i.
Mods are:
Procede V5 running 5_23 E85 maps on 50/50 E85/91 Oct
DCI
VRSF 7" intercooler
VRSF downpipes
Eisenhaus Race Exhaust

Before having my ECU replaced I was able to run a 45% boost setting and an open loop fuel setting in procede of 85% and fuel trims peaked at ~23%

Since I got the ECU replaced at dealer I had noticed gas mileage was worse and car just generally didnt' feel right. I did a log and my Fuel trims were flat lined at 34% and AFR was high.

I upped the open loop fuel setting to 100% and lowered boost setting by 5% but Trims are still at 34% and I think AFR is still too high.
AFR is hitting 15.8.

Could there be something different about the new ECU/software in it making the tune not right anymore?
First time using datazap but here is a log.

[e92_enthusiast_1]

Could an adaptations reset help maybe?

[FirstBMWLA]

Originally Posted by e92_enthusiast_1

Could an adaptations reset help maybe?

I've reset pretty much every adaptation in the Bav tool software.

[Murf]

I've experienced the same variation in ECU's.

I used to be able to run 50+ % E85 with trims and afr under control.

Fried my ECU and had it replaced, now can't run more than 20% E85 without maxing trims and throwing 29e0 29e1 codes. Going on 15k with new ECU, have cleared adaptations, nothing works, it is what it is.

JB4 and everything else unchanged from one to the other.

Strange.

[Josh1a1h]

how do you fry your ecu?

[CHECKERED]

Originally Posted by Josh1a1h

how do you fry your ecu?

early 07 MT had defective diodes, poor quality rather than user error

[Josh1a1h]

onlly mt? not auto?

[FirstBMWLA]

Guessing I'm just going to have to go back to pump gas only tune until I can get a flash tune backend to get these fuel trims back down to something reasonable.

[Jklad]

I always thought my car felt different when I recieved a new ijeos dme, after my 2007 msd80 fried. Interesting that others notice some more empirical differences.

[badass335]

Originally Posted by Jklad

I always thought my car felt different when I recieved a new ijeos dme, after my 2007 msd80 fried. Interesting that others notice some more empirical differences.

Having the same thoughts as well. I had my ecu replaced in my 07 and got the ijeos ecu. Car just doesn't seem right.

[Jklad]

Originally Posted by badass335

Having the same thoughts as well. I had my ecu replaced in my 07 and got the ijeos ecu. Car just doesn't seem right.

I remember reading about how the msd80 was a bit 'more aggressive', for lack of a better way to put it.

Perhaps one of the tuners on here could comment on key differences between the msd80 on the 2007s, and the newer ecu's, and how this translates into real world observations?

[BQTuning]

Just a suggestion

the PROcede offset parameters are not calibrated to match the new ECU ie the new ECU logic may have changed slightly

[FirstBMWLA]

So in the past months I had pretty much just band-aid this problem by lowering the boost considerably.

I'm ready to get my car running right again and restore the boost levels that I used to be able to run.

I'm guessing the only way to do that would be a flash tune.
Recommendations?

Should I just bite the bullet and buy a COBB? Procede support seems kinda nonexistent at this point.

[Ilma]

Originally Posted by FirstBMWLA

So in the past months I had pretty much just band-aid this problem by lowering the boost considerably.

I'm ready to get my car running right again and restore the boost levels that I used to be able to run.

I'm guessing the only way to do that would be a flash tune.
Recommendations?

Should I just bite the bullet and buy a COBB? Procede support seems kinda nonexistent at this point.

Easiest and cheapest thing to try before spending any more money is to adjust your fuel scalars via a custom backend flash to your DME......meaning you would still stack with the procede.

This would result in the DME providing a higher rate of fuel delivery before any offsets by the Procede.

I was running rather high on fuel trims a couple of years ago after loading the aggresive maps into my procede and subsequently adjusted the fuel scalars up to 1.1 and things have looked much better since.

If that doesn't work then ditch the procede and get a flash tune.

[FirstBMWLA]

Originally Posted by Ilma

Easiest and cheapest thing to try before spending any more money is to adjust your fuel scalars via a custom backend flash to your DME......meaning you would still stack with the procede.

This would result in the DME providing a higher rate of fuel delivery before any offsets by the Procede.

I was running rather high on fuel trims a couple of years ago after loading the aggresive maps into my procede and subsequently adjusted the fuel scalars up to 1.1 and things have looked much better since.

If that doesn't work then ditch the procede and get a flash tune.

And what would be the best way to obtain the backend flash?
Appreciate the help.

Just thought about it. I'm running the builtin Procede O2 DP Fix. Should I try disabling that? I was running it before without issue but just thought maybe....