How-To: Warm/Hot Starts (and cold ones) with E85
#62
#63
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Alright I have appeared to have 90% fixed my problem. I had horrible warm/hot starts, cold was perfect. I changed all my latencies lower than 11V to the same as 11V. Mine happens to be 1.944 I think, can't remember off the top of my head. Also I think playing around a little with the cold enrichment table will help, but I have damn near perfect hot/cold starts and 90% perfect warm starts. I have tried starts at 55C, 68C, 78C, 85C all starting well. That's with about a 1/2 hour between each.
No ISCV stuff is touched.
No ISCV stuff is touched.
Last edited by Routybouty; Oct 10, 2009 at 09:40 PM.
#64
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Let's say fuel trims are absolutely perfect (+-1%). I have a problem with cold starts (takes a few cranks to fire). I've heard "you need to add more IPW and also the opposite of "you have too much IPW". Which is it? Can someone post their IPW tables/figures for E85, that have no issues with cold start?
#66
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So I did a log this morning for cold start issue (actually no start issue). Outside temp was about 45*F. During cranking, if I had my foot on the gas or not, the IPW was between 5 and 10. I'm assuming I need to add a lot more IPW on start up for my E85 map. Does this sound correct?
#67
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I dont understand why my IPW was so low on start up. It was 45* out this morning and it should be around 28ms.
I checked my coolant temp scaling table with a stock rom and it is just as stock. Doesn't really make sense to me.
I checked my coolant temp scaling table with a stock rom and it is just as stock. Doesn't really make sense to me.
Last edited by lan_evo_mr9; Nov 2, 2009 at 08:26 AM.
#68
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#69
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Edit: Those were the correct definitions, but wrong address's for alt maps. I have no idea how to find the correct address for alt map for those definitions. Any disassembler care to chime in?
Last edited by lan_evo_mr9; Nov 2, 2009 at 03:30 PM.
#70
EvoM Community Team
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Awesome! Thanks for the help. Is there anyway I could paste the startup def's into recompile v7? I've tried, and have gotten the tables to show up in the "stock replacement maps" and normal fuel category, but unable to have them show up as an actual "alternate xxxx" in Tephra mods.
Edit: Those were the correct definitions, but wrong address's for alt maps. I have no idea how to find the correct address for alt map for those definitions. Any disassembler care to chime in?
Edit: Those were the correct definitions, but wrong address's for alt maps. I have no idea how to find the correct address for alt map for those definitions. Any disassembler care to chime in?
#71
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If there's anybody out there (and I know there are) with the "I have no issue on cold starts"....If one of those people could post a pic of their "IPW Adder" table, it would be of great help.
I basically started with the stock IPW table, then doubled it at 7*C (my problem area), to no effect. I did make sure to follow the stock ECU curve in the table by the by. I just can't seem to get this last little bug out of my car
#72
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Edit: Just checked my laptop...my value at 7C is 56. And that's for 1250cc injectors that flow 1264cc. So, if you are on smaller injectors than that, you will want an even bigger number.
Last edited by l2r99gst; Nov 3, 2009 at 08:12 PM.
#74
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Just as a side note, don't increase the numbers below the 7C mark either. The 'warm' starts need very little fuel...it's just the 'cold' starts, starting around the 7C cell that need much more fuel.
Also, the rest of your IPW tables should be adjusted to match your injector size, if you haven't done that already.
Also, the rest of your IPW tables should be adjusted to match your injector size, if you haven't done that already.