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PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

low rpm/ light throttle surging

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Old Aug 11, 2012 | 04:04 PM
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Default low rpm/ light throttle surging
Was told to post this here also
https://ls1tech.com/forums/generatio...l#post16612505
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Old Aug 11, 2012 | 07:21 PM
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Do you know if it is running in open loop or closed loop? Can you post up the tune?
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Old Aug 11, 2012 | 08:06 PM
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Originally Posted by BLK02WS6
Do you know if it is running in open loop or closed loop? Can you post up the tune?
It doesn't seem to do it when it first starts up ( I can never remember if that's open or closed loop). I'm not sure what you mean by posting the tune up. It's the stock tune as far as I know, or what it was when I got it, with 3 degrees pulled out from 3000-6000rpm at WOT for the spray with a predator
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Old Aug 11, 2012 | 08:10 PM
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Well, if it has a cam in it and running on the stock tune, there's your problem... It needs tuned.
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Old Aug 11, 2012 | 08:26 PM
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Originally Posted by BLK02WS6
Well, if it has a cam in it and running on the stock tune, there's your problem... It needs tuned.
The one with the problem is the 99 Camaro. Bolt on's and n20, no cam
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Old Aug 16, 2012 | 03:55 PM
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Perhaps I should push it over a cliff. Any other ideas?
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Old Aug 16, 2012 | 04:03 PM
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Get rid of the SLP MAF.
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Old Aug 16, 2012 | 07:07 PM
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From: on the dyno tuning in MD
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Dry kit spraying on the MAF? SLP with a screen or not?
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Old Aug 16, 2012 | 07:36 PM
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Originally Posted by 2xLS1
Get rid of the SLP MAF.
I can do that, but it does it with the maf unplugged as well
Originally Posted by BLK02WS6
Dry kit spraying on the MAF? SLP with a screen or not?
wet kit spraying after the maf. The maf has the screen
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Old Aug 17, 2012 | 04:07 PM
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Ok. Installed a stock maf and a new TPS. No change. When it's cold started and in closed loop it runs perfect and a/f is 14.5 at smooth idle. as soon as it goes to open loop the a/f starts climbing till it pegs the meter at 21.9 and idle gets kinda rough. If you rev it the a/f reacts as it should but when it drops back to idle it leans way out again. does the same on very light throttle cruising
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Old Mar 17, 2013 | 12:09 AM
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Hey Cam99, were you able to find out the problem? I'm having the same exact problem (well the same exact symptoms) on mine. Thanks!
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