Adding load columns and RPM rows to maps
...Fuel on the other hand is a bugger because what you put into the map is never what you get in real life, and I constantly have issues with the fuel doing funny things inside of an increment. This is especially true at low to mid rpms. Here, I think it might be nice to perhaps go to load increments of 15 or maybe 10. Out past about 5500 rpm though, fuel never seems to do anything unexpected, and I think we could get away with a load increment of 30 for load cells from 5500 rpm and onward.
My biggest problem is between 302 and 403 Hz. Both of those are spot on, yet I still run 1.2AFR lean at worst in between. A 350Hz adjustment would help, which I should be able to add by deleting the 25Hz cell (same as my 19Hz) and adding the 350 in. I think the MAF Compensation/Smoothing is the only other table affected.
But more resolution in general would make this really nice. For some reason, there are lots of people with ups and downs in their MAF scalings. I know I do.
The way to adjust it is let the car completly warm up. In EVOScan set the car into BISS mode (can't remember what you actually click, anyone else know?) once that is set you adjust it to within 800 RPM + or - 50 RPM. Then you deactivate the mode and you are good to go. What it does it put the car into a mode where the ICSV stepper is not trying to adjust anything that way you can set the screw correctly.
If you get a CEL for the ISCV being out of its adjustable range, then the BISS/ISCV tables need work. You can get it dialed in just fine at any idle RPM if you take the time with it. I would re-enable the periphary and keep working at it.
Last edited by Jack_of_Trades; Oct 5, 2009 at 01:21 PM.
No. I have an eBay hard pipe. I think my numbers are lower because I only have a 3" filter. I know that's my biggest restriction in my whole engine right now.
I'm just read about how the MAF smoothing works. I didn't copy those over from the 2g rom. I have a few things to try.
I just figured I'd mention expanding the MAF Scaling table just a bit while the talk of expanding other tables was ongoing.
I'm not sure if my problems are unique to those of us who are trying to run the Evo Ecu in our DSMs, or if you guys are having similar problems too.
I'm just read about how the MAF smoothing works. I didn't copy those over from the 2g rom. I have a few things to try.
I just figured I'd mention expanding the MAF Scaling table just a bit while the talk of expanding other tables was ongoing.
I'm not sure if my problems are unique to those of us who are trying to run the Evo Ecu in our DSMs, or if you guys are having similar problems too.
The revhang stuff should be able to be solved by fiddling with the right hand column of the ISC Stepper table, it should NOT affect cold start (since the right hand column is 41C+ or something)
I have tried everything to get this to work on 9653 but it doesn't. No matter how many times I adjust the BISS screw it throws the code. I think it is a hardware difference between USDM and EDM. If I put the 9417 ROM in and set the BISS I don't see the SES come up. Only on the 9653 does it present this issue. The only way I found a way for it to work is set the BISS screw and disable the periphery bit and it works perfect.
These are the stepper tables and decel fuel cut tables from 94170015 on the left and 96530706 on the right. They are extremely different, I am going to set them equal and go for a drive. Has anyone done this?
edit: just realized that you cant see the numbers but just by the colors they are drastically different. I'll get a better screenshot up in a little while.
Last edited by mfr122887; Oct 5, 2009 at 03:41 PM.
There are a ton more ISCV tables that mrfred found and I did my best to find them for 96530006. I think a couple of them are RPM based and may be worth a shot to play with. Let me find the thread and link it here.
Here you go:
iscv-control-system-disassembly
Eric
Here you go:
iscv-control-system-disassembly
Eric
Last edited by l2r99gst; Oct 5, 2009 at 03:42 PM.
I guess, but I don't consider it an issue, just an inconvenience I hardly notice on my car when I drive. Maybe we are talking about something different cause my car isn't that bad.
My issue: When I leave of the gas my car goes rich (around 10-11-12 AFR) stays there for about 5 seconds then comes back down. Car sometimes bucks a little but not that bad at all. Is this what everyone else is experiencing?
It's def. in the fuel cut decel table just have to find out how to fix it. You are right though it only happens when switching to 9653 cause if I switch back to 9417 it goes away.
I am going to compare those maps from 9417 to 9653 and see if I come up with anything.
My issue: When I leave of the gas my car goes rich (around 10-11-12 AFR) stays there for about 5 seconds then comes back down. Car sometimes bucks a little but not that bad at all. Is this what everyone else is experiencing?
It's def. in the fuel cut decel table just have to find out how to fix it. You are right though it only happens when switching to 9653 cause if I switch back to 9417 it goes away.
I am going to compare those maps from 9417 to 9653 and see if I come up with anything.
I already compared the "Decel fuel cut delay" tables" in 96940011 and 88950015 (them both having throttle hang) with the ones in 9642008 and 94170015 (they dont have throttle hang). The values are different, but when I put the non-throttle hang values in a throttle hang ROM, it doesnt take away the throttle hang.
*i tired this on a car Im remote tuning, so i didnt get to actually drive the car and test it for myself, but the guy said the hanging remained.
Last edited by Evo_Jay; Oct 5, 2009 at 03:57 PM.
Also, there are decel fuel cut delay tables, which may do what you are looking for. I don't have them defined in my XML, but I'm sure they are on the forum...if not, I will find them for 96530006.
In the begining of ECUflash, when I had my IX, I did a lot of messing with the ISC stepper table. I was able to find a good balance of gettin rid of the throttle hang and still having cold start, but I dont think that is the correct way to get rid of the throttle hang. Like I said above, I think it has more to do with the "Decel fuel cut delay" tables.
Also when i tried the ISC Stepper setting that I used in my car to get rid of throttle hang on another car, they experienced poor cold start and said throttle hang remained.