Generation III Internal Engine 1997-2006 LS1 | LS6
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230/228 .591/.588 112LSA help

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Old 04-15-2007, 09:39 PM
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alrihgt so i started it up today and is sounded good except the fact of idling high and then hopping down to low rpm and almost dying out ... anyone got any information ...
Old 04-15-2007, 09:58 PM
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needs to be tuned
Old 04-15-2007, 11:04 PM
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could it be an IAC problem ??? or anything to do with egr or that it might be starving for air ??
Old 04-15-2007, 11:09 PM
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nope, if you want take out the throttle stop screw flip it over(so you can adjust it from the top) and turn up the idle a tad so itll be around 800-900rpm. it should get you by but will stall on occasion
Old 04-16-2007, 12:17 AM
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as in take the iac off and flip around the stop screw ? and then adjust it?
Old 04-16-2007, 04:15 AM
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It is called Trottle Positioning Relearn.

> Ignition off
> Unhook TPS sensor (bottom one on TB driver side)
> Open blade 1 turn (via idle screw)
> Turn Ignition ON (do not crank)
> Wait 15>30 seconds
> Turn Ignition off.
> Re-Hook TPS sensor
> Start engine and let it idle.

If not enough, try again with only 1/2 turn increament
If too much (car starts cruise mode right off idle in drive), then repeat with 1/2 turn decrease.

This should get you going untill a good tune.
Old 04-16-2007, 06:59 AM
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Originally Posted by sampson01
as in take the iac off and flip around the stop screw ? and then adjust it?
no, theres an idle screw on the throttle cam . the side where the cable is
Old 04-16-2007, 03:13 PM
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thanks guy ... ill get a vid up soon so i can show it off
Old 04-17-2007, 04:20 PM
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p0121 p0122 codes ... help .... studering at throttle and wants to puke at times.... anyone
Old 04-17-2007, 06:49 PM
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DTC P0121 TP Sensor Circuit Insufficient Activity
DTC P0122 Throttle Position (TP) Sensor Circuit Low Voltage

Check to see if it (the TPS) is fully plugged in, or it may just be going out.

EDIT: See Predator's post and make sure you plugged the TPS back in...
Old 04-23-2007, 11:20 AM
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Originally Posted by sampson01
p0121 p0122 codes ... help .... studering at throttle and wants to puke at times.... anyone
i had same problem. it was from the map sensor.
Old 07-18-2007, 11:03 AM
  #32  
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needs tune now ? ..... TP insuffientance ? and breaks up around 2500 ??? whats going on with that




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