About to File for Divorce from the Factory ECU . . .
#1
About to File for Divorce from the Factory ECU . . .
Well, I've just about had it. Tuning another forum member's factory-sized turbo car on E85 and getting all the features working and tweaked was fairly straightforward enough. We tuned it within a day, and it runs like stink. My own car however is an entirely different story.
- Made WOT runs today. Switching to 94170015 did alleviate the nagging P0300 code and misfire, but after adding Tephra's NLTS-CEL patch to the base XML, 2-byte load now reads in the thousands. I'm just too weary at this point to sift through hundreds of forum posts just to figure out where to begin.
- The car has 850cc injectors and runs 93 octane, and yet can't maintain better than 14.xx-15.xx AFR when the turbo comes on boost, and hits 100+% IDC. Go figure that one out.
- Car feels like it hits boost cut around 320 load. Boost cut timer set to something like 400,000 ms, but I can't be sure if it's actually boost cut (?) or something else.
- Idle dips to 400rpm at times, and sometimes it stalls. Nothing seems to fix that.
- And lastly (I wish), the M&W COP system is NOT directly compatible with the factory ECU, as there is a persistant low throttle angle, low load misfire. It takes its toll on fuel economy, and makes the car jerky at times. No one can seem to figure out why it doesn't behave this way with standalones.
Sorry for the grocery list of headaches, but I have invested far more time in dealing with the idiosyncracies of the factory ECU than tuning the car itself, and I'm just completely burnt out on it. When I install my new ported head, BIG cams, new intake manifold and TB, etc., I can't even imagine the frustration that awaits. I feel strongly that I am not going to let things get to that point.
(sigh)
- Made WOT runs today. Switching to 94170015 did alleviate the nagging P0300 code and misfire, but after adding Tephra's NLTS-CEL patch to the base XML, 2-byte load now reads in the thousands. I'm just too weary at this point to sift through hundreds of forum posts just to figure out where to begin.
- The car has 850cc injectors and runs 93 octane, and yet can't maintain better than 14.xx-15.xx AFR when the turbo comes on boost, and hits 100+% IDC. Go figure that one out.
- Car feels like it hits boost cut around 320 load. Boost cut timer set to something like 400,000 ms, but I can't be sure if it's actually boost cut (?) or something else.
- Idle dips to 400rpm at times, and sometimes it stalls. Nothing seems to fix that.
- And lastly (I wish), the M&W COP system is NOT directly compatible with the factory ECU, as there is a persistant low throttle angle, low load misfire. It takes its toll on fuel economy, and makes the car jerky at times. No one can seem to figure out why it doesn't behave this way with standalones.
Sorry for the grocery list of headaches, but I have invested far more time in dealing with the idiosyncracies of the factory ECU than tuning the car itself, and I'm just completely burnt out on it. When I install my new ported head, BIG cams, new intake manifold and TB, etc., I can't even imagine the frustration that awaits. I feel strongly that I am not going to let things get to that point.
(sigh)
#6
I don't think the problem is with Evoscan. In fact, I know what the problem with 2-byte load is. Apparently, 2-byte load is not included in the 94170015 mod XML that I swapped in today. Looks like I need to go hunt down that patch for this XML file (wherever it is).
All of this is just becoming too much for me to remember.
All of this is just becoming too much for me to remember.
Last edited by Ted B; May 22, 2008 at 05:09 PM.
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#9
35164 and 35165
Don't ask me where I got those numbers. I've sifted through so much that I wouldn't remember for the life of me. After another session of searching, I found the code for the MUT table somewhere else. I didn't change anything in it.
I did that, but something went amiss, and I had to restart from scratch.
Don't ask me where I got those numbers. I've sifted through so much that I wouldn't remember for the life of me. After another session of searching, I found the code for the MUT table somewhere else. I didn't change anything in it.
I did that, but something went amiss, and I had to restart from scratch.
#11
Evoscan:
<DataListItem DataLog="Y" Color="" Display="Load MUT 2Byte Mod" LogReference="LoadMUT2Byte" RequestID="00" RequestID2="01" Eval="0.3125x" Unit="units" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="500" ChartMin="0" ChartMax="500" ScalingFactor="1" Notes=""/>
MUT table address (from ECUflash XML): 38158
<DataListItem DataLog="Y" Color="" Display="Load MUT 2Byte Mod" LogReference="LoadMUT2Byte" RequestID="00" RequestID2="01" Eval="0.3125x" Unit="units" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="500" ChartMin="0" ChartMax="500" ScalingFactor="1" Notes=""/>
MUT table address (from ECUflash XML): 38158