PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

high idle when coming to stop

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Old May 18, 2005 | 07:10 PM
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Default high idle when coming to stop

What is the best way to cure a high idle problem when rolling up to a stop. After I stop the idle will drop down to commanded within a few seconds. I raised my raf tables a lot but it reallly helped with my bucking at idle in first but the high idle is really annoying. Would this be the throttle cracker table since it happens while moving or do I just need to lower my raf? My stit was at like -.2 or so with the ltit at 0 all the time.
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Old May 18, 2005 | 07:14 PM
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I had this Problem,I dropped my IAC .5 and it took care of the problem,But I am a A4 car....
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Old May 19, 2005 | 11:05 PM
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to the top
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Old May 20, 2005 | 03:48 PM
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What did you set your RAF at? I would guess that is the problem if you are over 9.0 or so.
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Old May 20, 2005 | 05:13 PM
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Originally Posted by Camaro ChriSS
What did you set your RAF at? I would guess that is the problem if you are over 9.0 or so.
Yeah. Its well over 9. I think its right around 12. I used one of the spreadsheets to calculate this with my ltit and stit data though...
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Old May 20, 2005 | 06:38 PM
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did you drill your TB at all?
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Old May 20, 2005 | 08:12 PM
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No, I adjusted via the set screw. I didn't have any high idle problems before I raised the raf last time. Raising it to the values I have now helped a lot with the bucking I was experiencing in first gear before. It also helped with starting. I just want to be able to retain what I gained and lose the high idle. Reason I was thinking it might be throttle cracker was that if I am sitting still the idle drops to normal, but if I roll up to the stop the rpms hang until I come to a complete stop. Even then it takes 4-5 sec. for it to drop though.
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Old May 21, 2005 | 12:29 AM
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have you set the on off table for the raf table to shut off at say 5? that way it is off by the time you get that low? or just zero out the section you are haveing probs in.. you can always put it back.
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