Life without ISC. What's it like?
12-02-2010, 12:59 PM
#44
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Post the CL idle valve settings and CL idle PID settings.
The coolant based cranking table is what PWM% your idle with will be positioned while you crank and where it will sit before the PID closed loop kicks in. If your idle is shooting up too high after intial start, you should lower those values. Also double check your RPM targets aren't too high.
The coolant based cranking table is what PWM% your idle with will be positioned while you crank and where it will sit before the PID closed loop kicks in. If your idle is shooting up too high after intial start, you should lower those values. Also double check your RPM targets aren't too high.
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12-02-2010, 01:17 PM
#46
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Increase crank to run taper to 4 or 5s.
Same for PID ramp to target time
Increase PID lockout rpmDOT - try 100.
Increase PID disable RPMdot to at least 500
Your dashpot adder is high, try 1% or none at all.
Same for PID ramp to target time
Increase PID lockout rpmDOT - try 100.
Increase PID disable RPMdot to at least 500
Your dashpot adder is high, try 1% or none at all.
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12-02-2010, 01:41 PM
#50
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yeah if you look at your settings the max the MS ever try to allow your valve to go is 40% when in PID mode, so you initial cranking duty table looks like it would cause high RPMs.
The rest dimitris suggested to change probably have little effect, just the delay before the PID code kicks in. I use 3% dashpot adder, I like the idle to drop 100-200RPM above my target and settle in.
For RPMdot lockout, just turn the RPMdot gauge on, watch it at idle and change the value to be 10 points above it. I see 80 on my gauge, so I use 90.
The rest dimitris suggested to change probably have little effect, just the delay before the PID code kicks in. I use 3% dashpot adder, I like the idle to drop 100-200RPM above my target and settle in.
For RPMdot lockout, just turn the RPMdot gauge on, watch it at idle and change the value to be 10 points above it. I see 80 on my gauge, so I use 90.
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12-02-2010, 03:03 PM
#51
So far so good on my drive at lunch. I started the car and immediately started driving. The idle settled fine. I'll have a better idea tomorrow when it is colder, but the car had been off for 5 hours so it normally would have hung the idle open.
I used to have the idle valve set to 98% After datalogging I saw that my IAC never opened past 41% or closed below 21%, so these are the values that i set for max and min. I guess increasing the max to 100 won't hurt anything.
I used to have the idle valve set to 98% After datalogging I saw that my IAC never opened past 41% or closed below 21%, so these are the values that i set for max and min. I guess increasing the max to 100 won't hurt anything.
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12-02-2010, 03:15 PM
#52
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well. go to idle valve test mode and find the range in which it acutally works. You don't have to plug in the actual numbers, reducing the window like that will increase your resolution/sensitivity. When it's cold or going uphill in first gear you might find you need more than 40%. I think I have mine set to 60% but it doesn't go open any further after that point so that's the full open point.
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12-02-2010, 04:18 PM
#53
well. go to idle valve test mode and find the range in which it acutally works. You don't have to plug in the actual numbers, reducing the window like that will increase your resolution/sensitivity. When it's cold or going uphill in first gear you might find you need more than 40%. I think I have mine set to 60% but it doesn't go open any further after that point so that's the full open point.
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12-02-2010, 04:21 PM
#54
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yes, run the car. go to idle valve test mode, and plug in the number you want to sit the valve at. if you put in 0, the valve will be fully closed. Increase it until your idle speed acutally rises. Then you know this is the lowest dc% number that acutally works the valve. Keep going up until you find the highest value that increases the engine speed. Then you know what the max dc% is.
You'll have to restart the car in order to go back to normal idle.
You'll have to restart the car in order to go back to normal idle.
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12-02-2010, 09:49 PM
#59
your t, once plugged in it became obvious. I started at zero. My idle was higher than normal. As I increased from zero the idle dropped to normal. Then when i got to 17 it started to increase. It increased all the way to 98, but stopped dramatically increasing after 82. I set my min value as 17 and my max value as 82.
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