No problem, John. I don't expect to you waste anymore time on this with all of the other stuff that I'm sure you are working on. We have others who can continue on. I just appreciate all that you have contributed.

As far as the 3D table and fuel map, yes I agree for open loop tuning, but closed loop tuning, the fuel map isn't going to help. That's where a 3D VE map will help with the granularity.

If I didn't have so much going on, I would teach myself the ROM code...I have the manual. But I think it would take way too long for me to get up to speed to be able to contribute to a project like this. I guess that's what we have tephra and mrfred and the other disassemblers/coders for.


Thanks,
Eric

 

When running SD and the AIT is connected via fuel temp pin (and MAF is removed), what does the ECU use for IAT-related tables? Does it substitute the post-IC IAT? Thx.

 

To my understanding, yes. So, it may be wise to adjust certain tables that retard timing due to intake temps, etc.

 

Quick question - which MAT scaling should we be using? The values stated under the Tephra section or the values stated under JCS SD Programming section? I noticed they are different and wanted to clarify that.

It appears as though the MAT scaling values under Tephra's section should be copied and paste per JCS instructions in parenthesis - just want to confirm this though.

Thanks

 

im removing the MAT stuff from my V7 ROM...

less confusing

 

Ok cool. When is v7 going "public"?

 

midweek...

 

are you doing 90550001 too mate ?

 

yeah intend too..

96530006 will be first, followed closely by 88590015, then whatever

 

Nice 1 mate.

Mine will be back on the road very soon, with a new spec, so will be nice to have a new rom to play with

 

Question for the mod gods.

So lately i've been fine tuning my speed density setup by turning off open loop so i can get a better feel for whats going on during low load where the biggest errors occur. I setup a data item to log the % of deviation between the AFRMap and the logged wideband AFR. But then i came upon this particular oddity.

So I noticed when at idle and low load around 31-33 Load my AFRMap reads 13.8 then jumps to 16.8 alternating every second or so. My fuel map is set to 14.7 so I don't understand why the ECU is spitting out this number.

Help would be appreciated.

 

Maybe it's that IPW issue that I have been posting about with SD. Is your IPW jumping/dipping during the AFR spike?

 

Yeah i believe it was something like 1.536 to 1.7 something.

 

It would be interesting if this is the issue. There's nothing that I recall in the SD patch that affects the AFRMAP calculation. l2r, if you find that AFRMAP is the issue, I'll take a look at the AFRMAP routines again.

 

For me afrmap wasn't the issue. I'm going off of memory, but afrmap was flat in all of my logs during the issue.