cold start enrichment table
I see, I scaled rpm to RPM and I get 0-2000 in 250 rpm increments. Did he by any chance give you the correction coefficient formula(scaling name)?
Last edited by Jorge T; May 27, 2008 at 12:01 PM.
Mrfred, on DSM's they did not have a cold start timing map, they just ran more timing when cold, no timing correction when up to temp, and less timing when overheating.
I thought on evo's though that the three timing maps were for engine cold, engine warm, and limp mode?
I thought on evo's though that the three timing maps were for engine cold, engine warm, and limp mode?
^ I don't think anyone has ever figured out what the three timing maps actually do. They just say "trust me" and make them all the same!
I'm not sure who this thread is aimed at..... is it for the E85 users or is it for the folks that have a jerky cold engine drive for the first few minutes of their commute?
My 9 doesn't like to smoothly cruise at 3k rpm when the motor is cold....it seems to be fighting itself. I wish we could fix that.
I'm not sure who this thread is aimed at..... is it for the E85 users or is it for the folks that have a jerky cold engine drive for the first few minutes of their commute?
My 9 doesn't like to smoothly cruise at 3k rpm when the motor is cold....it seems to be fighting itself. I wish we could fix that.
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I know it doesnt make sense to me either. That was what I was given by a guy in japan, so I just went with it. I am sure the RPM scaling is incorrect, but I am not sure what its sposed to be either. I dont do disassembly but I wanted to contribute what I had at any rate. 
In my 03VIII don't see any difference(logged) in cold start timing and fully warm timing at idle, just AFR.
Speaking of cold start stuff, has anyone found the "cold" start ignition and fuel tables yet?
There has to be some. If I drive off in my car stone cold, any throttle input past just cruise, (not WOT of course), the car will stumble and choke until it warms up a bit. Feels like retarded timing to me.
There has to be some. If I drive off in my car stone cold, any throttle input past just cruise, (not WOT of course), the car will stumble and choke until it warms up a bit. Feels like retarded timing to me.
But I'm liking this thread
^ that is how I solved my cold start problem too. But, if I cold start the car let it run for 1 or 2 min, shut off for a min or 2 then restart it sets P0300 (at idle according to freeze frame). It's happened twice when I moved the car and set the ramps to raise the car to do maintenace work. Never done it before that.
^ that is how I solved my cold start problem too. But, if I cold start the car let it run for 1 or 2 min, shut off for a min or 2 then restart it sets P0300 (at idle according to freeze frame). It's happened twice when I moved the car and set the ramps to raise the car to do maintenace work. Never done it before that.
My cold start AFR's are the same as my normal operating temp AFR's. Around stoic.
Oh ok mine is above 16 (the highest my wideband can read) with the ecu in close loop during cold start, so thats why I did it that way for me . You can always try richen it up to see if it makes a smooth transition for you. I set my cold start afr's to the mid 13's, my car sounds and feels better.
I know what your talking about my car did the same thing but my wideband just read lean though.
. You can always try richen it up to see if it makes a smooth transition for you. I set my cold start afr's to the mid 13's, my car sounds and feels better. I know what your talking about my car did the same thing but my wideband just read lean though.
My friends 03 runs lean on cold startup as well now that you mention it. My 9 cold starts just fine. Adding some timing seems to help when driving around when warming up the motor as well on a 9 so it should help an 8 as well.