i got a jdm8mr 96260009 and do not have cold issues as u talk of (well i have only been using for 3 days) so its early yet.

 

Since the days are getting colder....is anyone still working on this ? ?

 

I know this has been discussed beforein other threads....but....

Is it possible that the "low coolant temp timing trim map" (address 3ff5) is actually a low coolant fuel trim map"?

I ask because we have a timing map for cold idle (the table with the hole of -5) (address 61c9), but no fuel map. By changing the scaling to AFR in the "low coolant timing trim" map it becomes a fuel map with nearly the identical area now being leaned out a lot.

What I am getting at is this...
If these 2 tables are, in fact, for cold idle.....by adjusting them we can "tune" our cold idle conditions rather than disable them.

Thoughts ? ? ?

Paul

 

Please see my original post.....

I resolved the cold idle isses and the 2k rev is gone. Yes, I repeat, the rev is gone. It seems that the Decel Fuel cut tables caused problems as does some of the Periphery settings.

Others, please try my settings and report back.

Paul

 

I had a turbo failure (hotside has a crack in 1 scroll and NOT from porting...) and am waiting for replacement.

 

That sucks Jorge....Are you planning an upgrade?

 

Gonna try these settings in the am. This may be one problem fixed, boost issue is another lol

 

I ordered a BBK full(comes in friday), the way things are going the replacement may take weeks (Tomei).

On topic..when trying to dial in my FIC 1050 I noticed that on my 03 cold start timing is at +5 not -5. I gave up when I found the crack on the hotside

 

That is odd....mine goes to -5 and greater when cold.

Hey Jeff....how did the settings work out????

 

no update yet. Car does drive great at low cruise like before...i'll report back in the morning if i find success. Right now this ecu boost is driving me nuts.

 

Cold rev for me now is a very quick jump to 1500 immidiatly after starting....then it goes very quickly to my idle setting.

FINALLY....the car is normal in cold weather....I love successful ventures.

 

Nice. Have you pinpointed it to any one/two settings as the cause? I see your original post lists several things, but just curious if you knew which one or two (if it was one or two) that caused it.

The only reason I ask is because I, too, have the 2k idle when cold. But, from what I remember, mine started after I altered the low temp timing trim table for E85. I just never changed it back yet to see if that was the cause. For E85 I had altered many of the IPW tables as well, so it could have been a combination.

 

I believe it is a combination of making sure ALL stock 9417 settings carry over to the v7 rom and making sure than any adjustment that is seen on multiple tables...those table use the same values. (Example is the start IPW and the 14v latency settings)

In addition, I am quite certain that the Periphery settings on v7 are not exactly correct. Once I made them as you see on my first post the car ran substantially better.

As for me....if you do not see a change in my OP....it is still set to stock (well except my tune for timing, fuel, launch, etc.). I did not alter the low tem timing table.

On that note, based on the size of that table, I believe it is a fuel, not a timing, table. I claim this because there is a warmup timing table (the new one with the hole of -5), but there hasn't been a fuel table for the same area of adjustment. By changing the scaling of the Low Coolant Timing table to AFR, you will see that nearly the exact area is covered with much leaner values. In observing cold idle you will see that you should be much leaner and timing is pulled....thus 2 tables are needed.

What is comes down to is that although we are unsing a "universal" rom, there is still vehicle specific settings we must carry over from our stock rom in order for the car to run as it should.

 

Yeah, I think the 'start IPW' isn't even called in 96530006, if I remember correctly from mrfred. Also, I think the low coolant timing trim map (the one that controls the other map) is defined right based on mrfred's disassembly.

That's why I was just curious if you noticed any specific table or two as the main contributors. Hopefully, I will have some time this weekend to sort it out on my car.

As far as the peripheries are concerned, I switched from 96940011 to 96530006 a while back (well before V7), but I just kept all of the periphery values that 96530006 came with. I remember asking a question before switching if we should try to match from our old ROMs, but no one really responded since many bits and settings are still a mystery. Since my car has run fine on 96530006 for the most part, I just left it as stock for this ROM.

I think I will try to mess with just the low coolant temp timing trim map and the unknown map to see how they affect the idle.

 

You know, I never thought to use 9653 as my basis of setting the peripherys...turns out I should have. It would have saved me a ton of time. I couldn't use 9653 of anything else though since I do not have a fully defined XML for it. Thus I used my fully defined 94170015 as basis for my findings.

Something to consider is that the "unknown" table (hole of -5s) seems to be controlled by the "percent low temp timing trim vs coolant temp" table. 100 in the percent table allows 100% of the hole of -5s table to be used for that specific temp.

I re-labled my unknown table as "Warmup Ignition Retard". I also changed the normal idle areas from the stock setting to my current tuned seting of 11 and the pull that happes at 1K I set to = 0 out to 60 load. The rest is all stock.

I think the post primer tables, decel fuel cut tables, and the open loop load tables were key in making the car run right. These tables are vastly different among the different roms.