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[HP Tuners] Idle drop at low speeds

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Old 01-21-2011, 09:10 PM
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Default [HP Tuners] Idle drop at low speeds

Here's the problem: When driving around the neighborhood at low speeds or stopping at a stop sign, pulling up the driveway in 1st or 2nd gear my idle always drops to 3-400 rpm as I'm coming to a stop. If I'm driving around town and leave it in 3rd with the clutch in while braking to a stop I have no problem, but if I downshift to 2nd or 1st to help decelerate I have the same idle dipping problem.
Just wondering what tables I should be looking at, or what values I should be logging to fix this. Any pointers are greatly appreciated.
Old 01-21-2011, 09:16 PM
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Check out your throttle follower settings, they are gear specific on the autos but i am not sure on manuals. Also your throttle cracker table may need to be increased as well
Old 01-21-2011, 09:27 PM
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I'll check em' out. Something I forgot to add, the problem usually doesn't occur until I reach full operating temp
Old 01-21-2011, 10:26 PM
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Show us your tune and a log if you can.
Old 01-22-2011, 12:18 AM
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Does the truck have the factory cam?
If you need help with the pid's and or histograms,let me know.

Last edited by Wheatley; 01-22-2011 at 02:12 AM.
Old 01-22-2011, 12:48 AM
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When is the last time you removed and cleaned your throttle body?
I have seen this happen several times... Dirty
Old 01-22-2011, 01:51 PM
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Originally Posted by BlackGMC
Check out your throttle follower settings, they are gear specific on the autos but i am not sure on manuals. Also your throttle cracker table may need to be increased as well
This. Also, check the idle underspeed spark tables.
Old 01-23-2011, 05:18 PM
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Thanks for all the tips. The throttle body was ported and polished about 5k miles ago, still looks pretty clean. I found the throttle follower and cracker settings and also the underspeed spark, but I haven't got around to messing with them yet. I'm also starting to wonder if I don't need to bump my ETC Area Scalar a bit.

edit: @Wheatley its the stock cam and I've done no idle tuning as of yet. As for my idea on the ETC Area Scalar, that shouldn't be applicable as I didn't take any area away from where the blade seats in either direction, right?

Last edited by RSTinOKC; 01-23-2011 at 08:14 PM.
Old 01-23-2011, 08:14 PM
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Originally Posted by RSTinOKC
... I'm also starting to wonder if I don't need to bump my ETC Area Scalar a bit.
Did the problem start "about 5k miles ago"?
Old 01-23-2011, 09:48 PM
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If you are running the stock throttlebody,the area scalar should be left as is,unless it has been tampered with and is not correct.


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