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Need help with idle tuning

Old Feb 14, 2009 | 02:51 PM
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Default Need help with idle tuning

Why does it take so long for my truck to come back down to idle after a rev? It comes down slowly and when it gets to about 1100 it stays for a couple seconds before it goes down to set idle. How do I fix this?
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Old Feb 14, 2009 | 04:06 PM
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Throttle follower decay and throttle follower decay delay!

Last edited by Wheatley; Feb 14, 2009 at 04:40 PM.
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Old Feb 14, 2009 | 04:29 PM
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The all mighty Wheatly! lol. I'm gonna mess with it and see if I can do something. Thanks!
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Old Feb 14, 2009 | 04:38 PM
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Not a problem buddy,if you need a few pointers email me or pm me!
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Old Feb 14, 2009 | 04:58 PM
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just zero it out?
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Old Feb 14, 2009 | 05:18 PM
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No I never zero the throttle follower decay out
Originally Posted by dirt track racer 81
just zero it out?
Lower values mean slower decay and higher values mean faster decay
decay delay is the delay before the decay begins to be subtracted
Make sense?
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Old Feb 14, 2009 | 05:19 PM
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Don't know exactly what I'm doing, but made a few changes and it's beter but I still have to work on it. It comes down to idle like I want now but sometimes kills. The decay delay was zero'd out. Now it looks like this:

vss secs.
0 .10
3 .10
6 .10
10 .00
zero from here down

Decay rate is:

vss secs.
0 .03
3 .05
6 .07
10 .09
13 .11

Does it look okay or is it a little off? I'll just mess with it till it's right.
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Old Feb 14, 2009 | 06:01 PM
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Originally Posted by Wheatley
Lower values mean slower decay and higher values mean faster decay
decay delay is the delay before the decay begins to be subtracted
Make sense?
Exactly what i'm looking for right now. Before the stall it was fine, but now with it in gear it likes to surge 500rpm to 1300 rpm up and down up and down. Almost have to put it in neutral to sit at a light.

Working on this tonight when I get off work. I need to slow mine down and decrease the delay i guess.
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