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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 02-10-2013, 04:20 PM   #321
FutureFast
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Using INPA I was able to increase the heating of the pre Cats sensors 90% ... however the returned voltage didn't change.

I looked at the analog values screen and I wanted to see what 452 kPa reading means for gas pressure entry (I hope they mean fuel pressure ): 452kPa is approx 65.5 psi.
According to this article http://www.autohausaz.com/bmw-auto-p...el-pumps.html:
.................
For example, certain BMW models with Bosch Motronic require 55 to 61 psi (3.8 to 4.2 BAR) of static pressure measured with the engine off. By comparison, a BMW may require 43 psi (3.0 BAR) on some models or 48 psi (3.3 BAR) on others. The differences may not seem like much, but a few pounds of fuel pressure can have a significant impact on engine performance and emissions.
...............

GO figure ... and I changed fuel pump and fuel filter/pressure regulator.
I will get a gauge/tester to read the fuel pressure at the end of the fuel rail.

This would be my last post as my problem becomes more of a troubleshooting issue relative to air/fuel mixture and pre-cat numbers (I don't want to deviate from the purpose of this thread).

And I can say that the LC-1 solution addressed in this thread works (see post-cat voltages reported in INPA screens above - yes, when I press the pedal the post-cat voltage changes for both banks).

Thx again for a very helpfull thread.
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Old 02-10-2013, 04:53 PM   #322
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"o2 simulators work for city driving only and will not work on the highway." I was told this from the seller/sponsor that I bought an o2 sim from on this forum. This has everything to do with STFT and LTFT.
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Old 02-10-2013, 08:33 PM   #323
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Quote:
Originally Posted by FutureFast View Post
Using INPA I was able to increase the heating of the pre Cats sensors 90% ... however the returned voltage didn't change.

I looked at the analog values screen and I wanted to see what 452 kPa reading means for gas pressure entry (I hope they mean fuel pressure ): 452kPa is approx 65.5 psi.
According to this article http://www.autohausaz.com/bmw-auto-p...el-pumps.html:
.................
For example, certain BMW models with Bosch Motronic require 55 to 61 psi (3.8 to 4.2 BAR) of static pressure measured with the engine off. By comparison, a BMW may require 43 psi (3.0 BAR) on some models or 48 psi (3.3 BAR) on others. The differences may not seem like much, but a few pounds of fuel pressure can have a significant impact on engine performance and emissions.
...............

GO figure ... and I changed fuel pump and fuel filter/pressure regulator.
I will get a gauge/tester to read the fuel pressure at the end of the fuel rail.

This would be my last post as my problem becomes more of a troubleshooting issue relative to air/fuel mixture and pre-cat numbers (I don't want to deviate from the purpose of this thread).

And I can say that the LC-1 solution addressed in this thread works (see post-cat voltages reported in INPA screens above - yes, when I press the pedal the post-cat voltage changes for both banks).

Thx again for a very helpfull thread.
I hope you get it working; however, I think you may be the first MS45 to try this. The rest of us are running MS43. Someone please correct me if I'm wrong on this one.
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Old 02-13-2013, 10:41 AM   #324
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You are confusing me ... . It is working, the post cat voltages are using the LC-1 setup and are the ones that the DME needs to see. My issues come from either pre-cat O2 sensors or fuel pressure.

I see you have a 2005 car, which means you have a MS45, no ? Also, I saw other guys who posted here with MS45 and it worked for them as well.

Thx for the input.
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Old 02-13-2013, 10:49 AM   #325
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Originally Posted by FutureFast View Post
You are confusing me ... . It is working, the post cat voltages are using the LC-1 setup and are the ones that the DME needs to see. My issues come from either pre-cat O2 sensors or fuel pressure.

I see you have a 2005 car, which means you have a MS45, no ? Also, I saw other guys who posted here with MS45 and it worked for them as well.

Thx for the input.
Oh... being you were posting questions I assumed something wasn't working - congrats then.

I do have an '05, however I have MS43, possibly due to the fact that I have an xi?
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Old 04-04-2013, 11:52 AM   #326
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^ Yes. Xi's all had MS43 from what I can recollect.
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Old 05-07-2013, 01:40 PM   #327
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After over a year using my LC1 with no CEL and passing inspection last year I suddenly got a CEL a week ago. Pulled PA Soft and I have the 2 catalytic converter errors... Would I need to just recalibrate it? The live data shows that all the o2's are heated so I don't think the LC-1 is dead. Just in time for inspection at the end of the month...
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Old 05-07-2013, 02:50 PM   #328
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Originally Posted by E46Enthusiast20 View Post
After over a year using my LC1 with no CEL and passing inspection last year I suddenly got a CEL a week ago. Pulled PA Soft and I have the 2 catalytic converter errors... Would I need to just recalibrate it? The live data shows that all the o2's are heated so I don't think the LC-1 is dead. Just in time for inspection at the end of the month...
I'll ask the obvious question - are the cat codes pre or post cat?
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Old 05-07-2013, 03:06 PM   #329
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Re: No "check engine light" with headers!!!

Quote:
Originally Posted by dpgrand View Post
I'll ask the obvious question - are the cat codes pre or post cat?
Post cat. I just recalibrated the LC-1 and entered the appropriate values. I also cleared my codes and reset adaptations using PA soft. Let's see what happens.
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Old 05-07-2013, 03:25 PM   #330
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Post cat. I just recalibrated the LC-1 and entered the appropriate values. I also cleared my codes and reset adaptations using PA soft. Let's see what happens.
Resetting your adaptations was going to be my next recommendation. Keep us posted
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Old 05-19-2013, 08:04 AM   #331
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About 200 miles after the clear and it looks like everything's ok...

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Old 05-23-2013, 09:29 AM   #332
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Re: No "check engine light" with headers!!!

350 miles and nothing... Must have just needed a recalibration.
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Old 05-27-2013, 10:56 AM   #333
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I'm very interested in this solution and have read through this entire thread as it developed over the years and recently read through it again start to finish in one sitting. I understand all the connections and the options for keeping the O2s in place as the heaters or replacing them with resistors.

What I'd really find useful is some pictures showing where the splices have been performed and the cable routing. I confess, I've never had to remove the engine cover or touch any wiring near the ECU, so its new territory for me. If I keep the LC-1 under the ngine cover like I've seen, where do you route the cable for the LC-1's O2 sensor? Just drop it down and wrap it along anything you can find? Follow the existing O2 sensor cables? I need to do some homework and figure out where those existing O2 cables are going. If I decide to use resistors, I can just pull the old sensors out I assume?

I have a feeling there's going to be an influx of forum members looking to perform this install now that the Bimmerbrakes GEN3 headers group buy has taken place.

Any additional insight appreciated.

Last edited by jamex; 05-27-2013 at 10:57 AM.
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Old 07-08-2013, 06:13 PM   #334
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Installed the LC-1 and my car passed MA inspection today

The install was easy, if anything finding a computer with a serial port or even buying the converter is the hard part
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Old 07-08-2013, 07:18 PM   #335
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Installed the LC-1 and my car passed MA inspection today

The install was easy, if anything finding a computer with a serial port or even buying the converter is the hard part
Great news. I'm in Mass as well. Inspections in this state are a pain in the ass. I have my lc-1 and headers in a box in the basement. Gotta find some time to install this!
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Old 07-09-2013, 12:05 PM   #336
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Originally Posted by Dino1394 View Post
Installed the LC-1 and my car passed MA inspection today

The install was easy, if anything finding a computer with a serial port or even buying the converter is the hard part
Awesome. Were you driving with CEL lit prior to the LC-1 install? Did it clear on its own with just regular driving or did you intentionally perform a full "drive cycle" of various speeds and durations?
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Old 08-14-2013, 03:09 PM   #337
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I completed my install yesterday and the LC-1 works like a charm.
I was wondering if someone could confirm how does one go about entering a range of AFR values in the AFR field?

ie: To enter these values: .650v from 8:1 up to 20:1 AFR
.025v at 22:1 AFR

I did this:

.650v on the Voltage Field and 8.1:20.1 on the AFR field and it looked like it accepted the range but when I look at it again, it only shows 8.1
On the second line I'm just doing 0.25v and 22.1 AF

Thinking about it now, I don't think the app allows to specify a range within a range so nevermind... I'll stick with the original values.
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Old 09-04-2013, 11:32 AM   #338
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Inspection time

I don't have an CEL nor engine codes.

The issue I'm having is that the 2 catalytic readinesses are incomplete and not getting ready.
Ideas?
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Old 10-10-2013, 07:20 PM   #339
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Quote:
Originally Posted by jamex View Post
I'm very interested in this solution and have read through this entire thread as it developed over the years and recently read through it again start to finish in one sitting. I understand all the connections and the options for keeping the O2s in place as the heaters or replacing them with resistors.

What I'd really find useful is some pictures showing where the splices have been performed and the cable routing. I confess, I've never had to remove the engine cover or touch any wiring near the ECU, so its new territory for me. If I keep the LC-1 under the ngine cover like I've seen, where do you route the cable for the LC-1's O2 sensor? Just drop it down and wrap it along anything you can find? Follow the existing O2 sensor cables? I need to do some homework and figure out where those existing O2 cables are going. If I decide to use resistors, I can just pull the old sensors out I assume?

I have a feeling there's going to be an influx of forum members looking to perform this install now that the Bimmerbrakes GEN3 headers group buy has taken place.

Any additional insight appreciated.
http://forum.e46fanatics.com/showpos...8&postcount=67

follow that and the recommended post after that
and run your wires accordingly. whether that they be hidden or out in the open
I had my lc-1 unit where the wideband plugs in in the trans tunnel that used to hold a connector for something and ziptied it to that
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Old 10-22-2013, 05:07 PM   #340
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Updated Voltage Curve for MS45 cars

After running with the voltage curves suggested on the first page of this thread and subsequent posts by F1004fun, I ran into a running rich situation. The problem in my car seems to be more on the pre-cat sensor side but in troubleshooting this problem I think I came up with a more optimal voltage curve for the post cat sensors.

These are the different voltage settings I tried on the LC-1:

1- By far, the most stable settings, specially on MS43
.650v @18:1 AFR
.100v @22:1 AFR

2- F1004fun stated he had been running these numbers:
.650v @20:1 AFR
.025v @22:1 AFR

3- Last but no least, these were offered as an alternative to the problem I'm having with running rich but it didn't solve the problem for me:
.750v @20:1 AFR
.050v @21:1 AFR

In my research, I read a BMW white paper on fuel adaptations and fuel mixture principals, mostly formulas used, etc... From reading that paper and reading the FAQ on the innovate website I realized the above voltage curves were a bit off from the optimal figures mentioned on these two resources.

ie:
Q: What is the target lambda reading for my vehicle's engine?

A: In general, however, optimum horsepower is achieved between 0.85 and 0.90 lambda (12.45 AFR to 13.2 AFR using regular gasoline).

Based on those numbers and the INPA screenshots from my M5, I realized my voltage curve needed to change. Look at the voltages for both pre-cat and post-cat (or lambda and monitor probes). They are just about right according to Innovate.


This is a screenshot of Innovate's factory default settings, which are supposed to mimic a perfectly working O2 sensor (not necessarily optimal for BMW):


With all of the above said, these are my new values.
I just reset my adaptations using INPA so I'm still testing.
I don't recommend using these settings just yet but so far I've seen positive results.

Voltage Curve based on Lambda output.


Voltage Curve based on AFR


INPA Screenshots, before and after.

Fuel Adaptations using voltage curve:
.650v @20:1 AFR
.025v @22:1 AFR


Fuel Adaptations screenshot after my change (partial results, need to drive more to get full adaptations calculated)
Fuel Curve:
.889v @14.08 AFR
.103v @15.01 AFR



A couple of things to note on the above screenshot:
The voltages for my pre-cat sensors are still higher than desired. Target Voltage should be around 0.90v. Therefore, I'm still running rich as depicted on long term fuel adaptations (Additive values). These values should be closer to zero.
The new voltages for the post cat sensor are within the optimal range.
Short term fuel adaptations have not been fully calculated as you can see. I' looking to stay above -8% as seen on the previous screenshot. So far so good.

I'd like to thank F1004fun for his hard work and for offering this solution to running with no cats.
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