I've literally tuned over 100 evos with Ecu-Boost control and I have never seen anything like this before. I was racking my brain yesterday trying to figure out WTH was going on so I need a second set of eyes from you guys!

Moved this 2003 Evo from a MBC to a GM 3 port and went to tune it and no matter what, the ecu will pull all the WGDC because it maxes out LoadError at 19.8 and uses -55 WGDCCorrection.

Here is a chart of what's happening:



Here is the data in straight-foward sheet forum if you find the above hard to read:



Here are the boost tables:



Notice that the logged 2byte load is NEVER above target load in the tables, yet it shows load error as maxed out and takes all the WGDC out.

I have WGDC vs TPS zeroed out like I usually do.

Variable for boost control is set to 2byte load

Notice the ECU is using -55 WGDCCorrection even though I only have a max of -7.5 defined in the Boost Error table.

I tried all these roms with the same effect:

94170008
94170014 Tephra V5
94170015 Tephra V5.10

I also tried zeroing out the Boost Error table so it wouldn't pull anything and still showed LoadError but it didn't take any WGDC out (finally something that made sense)

Anyone have any idea what the heck is going on here? Bad ECU? Something I overlooked?

 

Your BCLO is 100 - shouldn't this be higher?

At 2750RPM
Your Bdel = 35%

100+35 = 135

Your 2byte @ 2750 = ~150ish 135-150 = -15. Your load error is about that.

Shouldn't your BCLO be higher?

 

LMAO

See, I knew I needed another set of eyes on this. I've been doing so many I just assumed my BCLO was 200. Even after making the screenshot and everything. 200 and 100 are the same color cell in ecuflash using the color set I use.

God I feel dumb now. I blame it on not eating at all yesterday.

I think I owe you like 15 beers by now tephra.

 

lol... dont worry its always something dumb

yeah volcano (right??) = bad sometimes

 

I haven't tuned the load based so i thought that was too obvious. I was going to post that about 20 minutes ago lol.

BTW i have found BLUORNG to be the easiest to read color map.

 

Ok so minus me being a dumbass and overlooking the obvious...

It's interesting that it was taking out -55 WGDCCorrection when the Error Correction table only has -7.5 as max.

 

Looks like someone's got a case of the mondays

 

the correction takes out -7.5 every time it polls and it is overshooting the target. It is cumulative so if you are 100 over it will take out -7.5, then -7.5 and so on until it is at target. At least that is how i interpreted it.

 

KAHKI.MAP color scheme then change window text to dark blue. All maps are distinguishable yet have a gradient.

The continental drift map (BRASS.MAP) for early style Al maps still beats em all hands down. Chunk's of stoich and rich floatin around in madness of custom tooned fuel mapping while the timing map, most of it 8 and red, allows knock to decide the advance. Guaranteed to give 20 more HP when you turn the MBC over stock

Seriously kahki color worth a shot

 

+1. I hadn't talked about it much but there is also a low cutoff value for total WGDCC. Its -64% on Evo 9s. If anyone is interested in looking at it, my latest Evo 9 ROM xml shows it. Shouldn't be too hard to find on other ROMs.

 

Ok. To bring this back from the dead...I'm having VERY similar issues. I am fairly new to tuning and have read over and over, searched over and over, cannot figure out my error.

Below are my settings and a excerpt from my log. I have played with baseline settings and tbec zero'd and recieved good boost results. Although, Loaderror is consistantly 19.8, but obviously only effecting boost when tbec is used.

Any ideas are greatly welcome.

-Travis

 

bump

 

any suggestions?

 

^ Above is with tbec zero'd out. Still has load error the entire time. Any advice?

 

With tbec zeroed it will NOT try to correct it, but it will still show the error.