RomRaider

No worries, ask away!

I'm pretty stumped with the CEL, I have followed how Bill did the misfire CEL and it sort of makes sense, I just have no idea how he found what needed to be changed. Just waiting on testing for the dwell stuff and the switching stuff. Other than that, is there anything missing from the ROM that has been in others that you guys would like to see if possible? Anything that hasn't ever been defined but you'd like me to look into?

Andy

You have everything covered, with the dwell, Grpn switch, really. I have wondered if there was a way to be able to control the sensitivity of the knock sensor? I will try and think of anything else but you have it covered

Basically your going to have timing/fueling/idle/idle timing all for both non-gpn and gpn mode

Wow, I totally missed this thread.

Going to try mode byte 8 tonight to get the per gear working. Really doesn't seem to need it though.

I've had this rom for at least 3000km and it runs great. Now that we have snow in Canada, it's really fun!!!!

I'll throw it on a WRX w/ 2.5L bottom end on the weekend and see what it'll do.

Let me know if I can test anything.

did you get proper injectors yet?
you really should wire up that IC auto function, this way you could change all those things on the fly with an OEM look!

Any possibility to modify the column headings (voltages) in the IAT scaling table?

No its a static axis.l therefor it technically can't be changed with individual values.

If youe trying to scale a gm iat that is not the way to do it.

I have been using one for a whilr and its within 1 2 degrees of ambient (in cold side of ic piping in fender)

Ok trying to wrap my head around this, is there a second VE table that is used when switched to grp n mode? Maybe I am totally misunderstanding how to tune the fueling part of this rom, I'm coming from a UTEC. I was loading my desired fuel afr's into Primary Open Loop Fueling (Group N Conditions Not Met) and then changing the VE in Speed Density Base Load Compensation (MAP v. RPM) Manifold Pressure, to arrive at the desired AFR. If this is correct, then is there also a Load Compensation Table for Group N Conditions?

The Primary Open Loop Fueling tables are just used by the ECU to determine OL/CL fueling correct?

Also I used to have an o-scope, I'll look around and see if I still do. Bought it used for some car audio stuff back in the day, not sure if it is what you guys would need, but, that can be decided after i find it.

bummer, no, I've got the values that match up with the ROM (i think), posted http://www.romraider.com/forum/topic5549.html?hilit=gm%20iat
What values are you using?

Elevenpoint7, it would be nice if you could look into tip out fueling or at least a comp to limit the time that fueling is added when throttle is lifted. I get 14 afr when throttle is pressed and 11 afr when throttle is lifted.

There is no such thing. Hoe can you take ipw away from 0 ipw?

Tip out is a direct redult of latency error

Mine does the same running this rom, hangs around 11:1 after lift throttle. It doesn't stumble, load up, stall or afterfire, so I'm not so worried about it.

Jerod would be better to talk to as far as the tuning of this ROM goes, considering he runs it and I can't yet However, As far as I can tell, there is no other VE table or load comp table. The logic behind the SD never checks for Group-N conditions. Everything SD-wise has already been defined. I did find something related to ECT but I'm not sure how it applies, or if it is even used yet. If you have an oscope that would be great!!

Fastblueufo - I am hoping to find something similar as I have the same issue on my car. I'm not sure how plausible it is though. I know merchgod found something in the 32bit ROMs regarding additional fuel added before the injectors are cut but it's based on RPM not throttle. I found something that might be related in the Group-N ROM, however, it was 3AM and I only glanced at it. I will try to dive into it some more this week.

I'm really having a hard time with this CEL and unfortunately, I don't think I will be able to disable it anytime soon. I am not 100% certain on where the CEL logic is, and if it is where I think it is, it's one of the largest, most confusing pieces of logic in the ROM.

Andy

Cool, hopefully he will chime in. Like I said I'm coming from a UTEC, we had 5 maps, and each map had fuel, spark, and boost tables. I'll check for the oscope this weekend. Thanks.

On most high end em's there is a table for pulse width when throttle is lifted or a delay before pulse width is cut. I would think that Subaru would have this added. I have read that it is used to limit flourocarbons. How it does this I have no idea.