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savages4
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« on: January 04, 2014, 09:00:40 PM »
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I live in sunny san diego, the coldest temps I see are in the low 50s in the morning. However, even at this high of a temperature i'm getting some issues with e85. First, it takes ususally 2 attempts at cranking the engine before it comes to life. 2nd, if I try to drive it without letting it idle for at least 2 minutes, as soon as I press the throttle the car falls on its face. I've attached about 1-2 minute log that starts with me cranking the motor and starting it first thing in the morning. I blip the throttle several times throughout this log to simulate the falling on its face I'm experiencing. From what I see the car is going very lean as soon as I touch the throttle and then over compensates and goes super rich. Any input as to what I should adjust would be greatly appreciated!
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titi65
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« Reply #1 on: January 06, 2014, 08:26:17 AM »
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Hi,
There is at least two thing (I think)
-Your enrichment is not sufficient (I've solved this thing on mine).
-Your wall wetting maps are sames as gasoline (like me), and it's a problem (I think).
I'm going dig in this direction soon . . .
If you find some things, you can say it there.
Thanks !
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savages4
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« Reply #2 on: January 06, 2014, 12:06:54 PM »
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The log above is with cold start and warm up maps enriched about 30% over stock. Hasn't seemed to help much, but maybe I need to get more aggressive. As far as wall wetting, isn't it used more under engine braking then just idle / part throttle? Again, after about 2 minutes of letting the car idle it runs perfectly fine.
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« Last Edit: January 06, 2014, 12:28:43 PM by savages4 »
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titi65
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« Reply #3 on: January 06, 2014, 03:08:14 PM »
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I resolved this by forcing more enrichment, it's running fine, event just after starting.
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savages4
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« Reply #4 on: January 06, 2014, 03:10:13 PM »
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How much more did you add overall to the cold start table and the warm up tables? As I said i'm at 30% and seeing very little improvement. Also it's hard to fix by trial and error as the car only does it after sitting for 8 hours..
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« Last Edit: January 06, 2014, 03:13:42 PM by savages4 »
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titi65
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« Reply #5 on: January 06, 2014, 03:44:14 PM »
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In my temp enrichment factor,, it's normally beetween 0 and 1, I moved very near of 1,so it's near 40% more in my case...
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sn00k
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« Reply #6 on: January 06, 2014, 03:55:00 PM »
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which maps are you adjusting?
this is easily solved by raising FKSTT (sometimes FKSTT_0_A, FKSTT_1_A) by approx 30% in 0 degC and lower.. and make a smooth transition to +15degC.
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savages4
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« Reply #7 on: January 06, 2014, 04:02:06 PM »
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Sn00k I've done this and like I said same issues... And it's like 52-58 degrees Fahrenheit on starts up in the morning so it isn't even cold. Maybe I need to enrich more than 30%?
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« Last Edit: January 06, 2014, 04:03:58 PM by savages4 »
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savages4
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« Reply #8 on: January 14, 2014, 11:37:39 PM »
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With much more enrichment in the cold start and warm up maps I was able to achieve a nice start every time and being able to drive off within 20 seconds from starting with no issues. Thanks for the input on this one everyone.
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