Speed Density 2.0 (3D VE Tables, Baro)
Dec 23, 2013, 09:47 AM
#796
Evolving Member
Hey guys. I've made another attempt to use Speed Density 2.0 Rom today.
I have EDM Evo8 and using 9417 ROM (9653 doesnt even start normaly whatever I tried). The car drives fine, almost no issues, except its a little jerky at 1000-2000 rpm comparing to my maf tune. I've tried closed and open loop, that doesnt help or noticeably affect that issue, so its currently in open loop.
The only problem that I can not solve is a lean start up after cool down. Starts up and revs a bit, idles at super lean AFR, which gradually become normal as engine warm up.
That issue doesnt respond adequatly to 3D VE Table tweaking. I've checked several times for heat soak, nothing serious. I also tried filling up the IAT calibration table with same value in all cells, to exclude any IAT sensor influence. Logs doesn't show anything abnormal, only lean super AFR that gets normal with warm up.
I recorded a video that shows the problem. Hope someone can suppose what can be the root of the problem...
I have EDM Evo8 and using 9417 ROM (9653 doesnt even start normaly whatever I tried). The car drives fine, almost no issues, except its a little jerky at 1000-2000 rpm comparing to my maf tune. I've tried closed and open loop, that doesnt help or noticeably affect that issue, so its currently in open loop.
The only problem that I can not solve is a lean start up after cool down. Starts up and revs a bit, idles at super lean AFR, which gradually become normal as engine warm up.
That issue doesnt respond adequatly to 3D VE Table tweaking. I've checked several times for heat soak, nothing serious. I also tried filling up the IAT calibration table with same value in all cells, to exclude any IAT sensor influence. Logs doesn't show anything abnormal, only lean super AFR that gets normal with warm up.
I recorded a video that shows the problem. Hope someone can suppose what can be the root of the problem...
Dec 23, 2013, 03:30 PM
#799
Evolved Member
"MAF Comp vs Coolant Temp" works fine for me for post start enrichment for cold starting on several 2.0 SD roms that I use for 7, 8 and 9's.
Fires on the key in ~10*C weather and idles low to mid 13's in closed loop with S3's at ~1050rpm target idle when warm, 1350rpm cold.
You have dialed the car in trim wise at idle in closed loop when warm?
Fires on the key in ~10*C weather and idles low to mid 13's in closed loop with S3's at ~1050rpm target idle when warm, 1350rpm cold.
You have dialed the car in trim wise at idle in closed loop when warm?
Dec 23, 2013, 05:28 PM
#801
Evolving Member
"MAF Comp vs Coolant Temp" works fine for me for post start enrichment for cold starting on several 2.0 SD roms that I use for 7, 8 and 9's.
Fires on the key in ~10*C weather and idles low to mid 13's in closed loop with S3's at ~1050rpm target idle when warm, 1350rpm cold.
You have dialed the car in trim wise at idle in closed loop when warm?
Fires on the key in ~10*C weather and idles low to mid 13's in closed loop with S3's at ~1050rpm target idle when warm, 1350rpm cold.
You have dialed the car in trim wise at idle in closed loop when warm?
But to answer your question - I started my tune on warm engine and dialed my VE table so that it holds ~14.7AFR (using 14.7 in Main Fuel Map) in 500-4500rpm 10-100load area just fine. So if I turn on closed loop on warm car my trims won't move much and will be in +/-3%.
Warm idle is perfect - closed or open loop. Untill I shut down the engine and let it cool down a bit.
Dec 23, 2013, 10:28 PM
#802
Evolved Member
I only run closed loop at idle to help with cold start for customers.
So yeah, not sure.
Basically I just dial in the STFT Low and 02 outputs to +/- 1-1.5%, then tune everything else open loop, test the cold start by logging coolant temp. If it starts to lean out at a certain temp, add fuel in 5% increments at the temp in the MAF vs Coolant temp table til the leanout is sorted and job done.
So yeah, not sure.
Basically I just dial in the STFT Low and 02 outputs to +/- 1-1.5%, then tune everything else open loop, test the cold start by logging coolant temp. If it starts to lean out at a certain temp, add fuel in 5% increments at the temp in the MAF vs Coolant temp table til the leanout is sorted and job done.
Dec 24, 2013, 01:35 PM
#804
"MAF Comp vs Coolant Temp" works fine for me for post start enrichment for cold starting on several 2.0 SD roms that I use for 7, 8 and 9's.
Fires on the key in ~10*C weather and idles low to mid 13's in closed loop with S3's at ~1050rpm target idle when warm, 1350rpm cold.
You have dialed the car in trim wise at idle in closed loop when warm?
Fires on the key in ~10*C weather and idles low to mid 13's in closed loop with S3's at ~1050rpm target idle when warm, 1350rpm cold.
You have dialed the car in trim wise at idle in closed loop when warm?
It doesn't work in 9417, I remember discussing about that issue with Jamie @ Dynotech and he confirmed what I tought. There may be some coding issue that prevents this table to have any effect on fueling.
Feb 6, 2014, 10:02 AM
#805
Hey guys. I'm still unable to successfully log fuel trims on evoscan 2.9 while using the speed density 94172715 ROM. I've tried switching cables from tactrix 2.0 to tactrix 1.3, and resetting the ecu by disconnecting the battery. A few months ago it was static at 0 for all trims, now its static -10 for low, -12 for mid, 0 for high and every once in a while it shows -12 in the "in use column". I've already thrown a P0171 code which shows the fuel trim too rich, and the wideband readings are varying from 11.5 - 12.3 at 290KPA_Load 3750 RPM, so I'm a little stuck here. Any help would be amazing right now.
Jul 4, 2014, 01:19 AM
#806
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has anyone successfully scaled 96534706 with normal numbers. the map kpa reads alot higher than load calc. i have to scale the right side over 1000 to get it anywhere close, this is with omni 4 bar, 9417 runs perfect as it should however it pops up with po340 and po355. crank and cam angle errors even though the car runs fine.
Jul 4, 2014, 04:24 AM
#807
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Never mind just found out everyone has the same issues with 96534706 running lean on tip in which is caused by loads reading much lower than kpa even when the tables are properly populated. Just had to go 9417 with disabled obdii routine
Jul 4, 2014, 09:43 PM
#809
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Are you referring to 9653 or 9417? Afaik everyone that has tried 9653 2.0 has had kpa/load issues. As for 9417 the cels were due to the usdm cam reluctor wheel being different to jdm ones
Last edited by burnzy; Jul 4, 2014 at 09:46 PM.