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Old 01-20-2012, 08:22 PM   #1
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Default Two Specific MS-1 Questions

1. Under Engine Constants, there is a temperature field called "Fast Idle Threshold." What does this do?

2. I noticed on a log that during cranking, my spark timing is a constant 18 degrees BTDC. As soon as I transitioned to ASE/WUE, it switched over to track my spark table. This was unexpected, and I'm uncomfortable having so much advance during cranking. Where did the 18 degrees come from and can I adjust it?

Thanks in advance!
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Old 01-20-2012, 08:32 PM   #2
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Quote:
Originally Posted by hornetball View Post
2. I noticed on a log that during cranking, my spark timing is a constant 18 degrees BTDC. As soon as I transitioned to ASE/WUE, it switched over to track my spark table. This was unexpected, and I'm uncomfortable having so much advance during cranking. Where did the 18 degrees come from and can I adjust it?
Basic Setup -> More Ignotion Options, "Cranking Advance(degrees)"
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Old 01-20-2012, 09:00 PM   #3
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Originally Posted by blaen99 View Post
Basic Setup -> More Ignotion Options, "Cranking Advance(degrees)"
Can't find it. I'm not sure that's available with an MS-1/MSPNP.
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Old 01-20-2012, 09:07 PM   #4
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Originally Posted by hornetball View Post
Can't find it. I'm not sure that's available with an MS-1/MSPNP.
OK. Found it. On MS-1, it is under Spark Settings ==> Cranking Advance Angle.

BTW, anyone that's having kickback problems during cranking should take a look at this.

So, my last question is "Fast Idle Threshold." ???
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Old 01-20-2012, 10:32 PM   #5
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Do you have a fast idle solenoid enabled and wired in?

From the Megamanual,

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You can also set your Fast Idle Threshold (F) if you have installed a fast idle solenoid. Enter a coolant temperature to turn on the fast idle solenoid. A typical value is 145 Fahrenheit. The Fast Idle valve will be activated below this temperature (145F) and turned off above 145F. The Fast idle Threshold is independent of any warm-up enrichment, though generally has a similar value.
I don't believe the Miata's use one (Brainy will be certain to jump in and tell me how completely and utterly wrong I am if I'm wrong about this), so I believe it's a question of if you have added one in.
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Old 01-20-2012, 10:46 PM   #6
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Super. I couldn't find it to save my life. We do not have a fast idle solenoid. So that setting has no effect on us.

Two mysteries solved. Love it. Prop to you!
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