You guys with your metric system... . If Metric is so great, why doesnt anyone else use it?

 

Okay, so how do i enable PE after a certain kPa? Say i want it to come in at 105-110kPa, what changes do i need to go back and make?

On a side note, i am continuing to read more and more about these lean issues in SD tunes. I must have read 6 or 7 5 page threads between EFILive, HPT, and over at TECH having problems going lean using SD tunes. Lean on cold start-up, lean on warm starts, lean on throttle tip-in.....whats the deal with all this lean crap? I am going to have to pay attention to my warm and cold starts when i continue my tuning. If i go partial SD, and use my MAF up to say 8 or 9000hz, will that eliminate this? Otherwise, im not sure i want to contend with all these lean problems.......lean is a killer. If it was a rich problem that would be one thing, but lean conditions scare the crap outta me. What are your takes on this lean stuff?

 

Still trying to determine lean issue. One theory I've been kicking around is the order of operations and rank of importance of the MAP sensor input. If it is not given as high of priority within the PCM as needed, then that could explain it. Only way to know this though would be if those that have reverse engineered the PCM would chime in.

As for enabling PE at a certain kPa, you just define that in the B3613 parameter. Leave your throttle enable table the same as when you were running the stock OS.

 

gotcha. so i command PE after say 110kPa via B3613, then populate B3618 with the AFR i want depending on RPM value, sound right?

Back to the lean thing, will running a partial SD tune with the MAF enabled eliminate these lean problems? If so, why dont people just do that instead of dealing with all the lean headaches?

 

It will eliminate some of them, but not all.

 

Hmmm, well maybe im doing all this just to get VE dialed in then.....

So let me ask you this......Do you feel comfortable hoping in your truck from a cold start and driving without waiting for it to warm up? Do you feel comfortable shutting the truck off and 5 minutes later hoping in and running it hard? Does the lean throttle tip-in cause you concern about going WOT for fear of the the initial lean spike? Im only asking because these are where the problems seem to be and i trust your experiencce with this stuff. I am not trying to be difficult.....just trying to weigh the pros and cons here. If i cant drive it like i normally would for fear of the lean problems, its not worth it to me to make the switch because im not going to have the laptop with me to monitor my conditions everytime i hop in the truck to take a ride. Im not going to jump the gun here, im going to finish my tuning and see where I am at. Like i said, if nothing else, this will be an extensive AutoVE tuning process that (me being FI),I couldnt do without going through all this anyway. Its a wonder Paul and Ross have not addressed this yet if there are this many problems. The adventure continues.......

 

I do feel comfortable hopping in and driving without letting it warm up. My lean tip-in problems last for approximately 2 minutes and only for the first few hundred rpm off-idle. I'm still researching this issue and may have found the root cause, I'll let you know tomorrow.

As for the other concerns. Part of the problem is how rapidly superchargers of our type (roots, screw) build boost. Give me a bit of time and swapping logs with an associate of mine and I'll have more info for you.

In the meantime, you don't have to drive like a granny, just don't drive crazy.

 

Sounds good Justin, im patient, just keep me posted.

Thats like asking a frog not to hop...

 

Okay, gettin this stuff down now. I am just about done with the major parts of the non-boosted VE table. Some of them cells i just cant get for nothing. I have a few questions.....again....LOL.

1. When using my filter to filter out unwanted cells like when TPS varies more than 5% or coolant temps are too low......how can I tell if my filter is active? I hit the filter button but all it says is its replotting, there is no symbol or anything telling me im looking at the filtered or unfiltered map. Sounds dumb i know, but you would think there would be something in the title telling me im looking at it filtered or unfiltered.

2. Once i have the units copied and multiplied into the VE table from my MAP, how do i make the other cells around it (the cells i haven't hit) look more sane? I know there is a way to blend the other cells in, but not sure how to do it.

3. Forgot to mention that i actually unplugged the MAF, is that okay?

4. When I am done with the Auto VE tuning, is there anything i need to go back and do in my tune so its set up for every day driving?

Justin, I messed with A0008 and A0014 this morning during cold start up, my commanded AFR "STARTED" at 14.79, it was never rich at all. I fiddled with the numbers up and down and it never made a bit of difference, it never commanded a rich condition at all during startup from 60F all the way up to 165F, stayed right around 14.80. Also noticed that it would stay a little lean on warm restarts as well, at least till i drove it for 15 or 20 seconds, then it settled back in. Just seems wierd that even my commanded AFR wont even work correctly (on cold starts), i could understand if it was my actual AFR i couldnt get down, but its the commanded AFR, so i have no clue what to do about that. There was a thread over at EFILive concerning some of this, not sure if you read it.....

http://forum.efilive.com/showthread....ighlight=A0008

I will tune a little bit more in the non-boost areas, then move into boost tuning. I am attaching a new tune/log file if anyone wants to look it over. Log_0002 is derived from Tune_0002, i apply the BEN factors from log_0002 to create tune_0003 and so on, let me know what you think....

VE_TUNES

 

1. If it's filtered data, the filtered button looks pushed in.

2. Highlight the general area that you just spent time tuning in (say 1200-4000rpms x 50-85kPa), right click and choose "Copy and fill with labels". Then Paste and multiply with labels into your VE table(s).

3. That's fine, just not necessary.

4. Once you're done with your VE tuning, you'll want to revisit the commanded AFR table and set it up how you want it. Refer to either my table or KBs for examples.


The A0008 is a known problem (to me) that I've actually posted a thread on. Joecar's tune works properly (see his commanded_afr in the inital screenshot).
Do a search on A0008 and you'll find the one where I'm trying to work through it. The problem is with at least a few different OSs, the A0008 table is having no effect on commanded AFR.

I tried a test today to see if I could force it to work, no luck. I did get rid of a good part of the near-stalling problem I have been experiencing, but not all of it.

Edit: Link to my A0008 thread: http://forum.efilive.com/showthread....ighlight=a0008