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2 bar map not registering boost

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Old Aug 2, 2010 | 03:01 PM
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Default 2 bar map not registering boost

in vcm sanner it does not go above 105 kpa in the afr histogram, and my boost conroller/gauge was showing 4 psi and you could hear the blow off valve, so it was building pressure

why is it not recording it in vcm scanner ?

i also have all this codes

p0102
p0106
p0645
p0650
p1637
u1016
b0017
u1040
u1000
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Old Aug 2, 2010 | 03:23 PM
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On the 3rd gen's you need to add the 2 bar MAP PID in place of the SAE MAP PID.
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Old Aug 2, 2010 | 03:36 PM
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it is a 4th jen and i have the 2 bar sd enhancement applied and all of my tables go to 210kpa
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Old Aug 2, 2010 | 03:44 PM
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Are you 100% its a 2bar?
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Old Aug 2, 2010 | 03:47 PM
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OK, if it's a 4th gen have you changed the MAP offset and linear to match the 2 bar MAP? Engine Diag, Airflow, 200 linear, 10.33 offset.
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Old Aug 2, 2010 | 03:51 PM
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Sorry, I may have not been clear. By 3rd gen I meant an LS1/LS6 PCM. 4th gen being an LS2/3/7 PCM. If you have the 2002 F-Body thats in your profile then you have a 3rd gen PCM which requires you changing the MAP PID in the scanner to the 2 bar MAP PID.
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Old Aug 2, 2010 | 04:18 PM
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^^^^ how exactly do i do that ?

i am sry if it is a stupid question, but i am new to this, if you can help me out i would really appreciate it
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Old Aug 2, 2010 | 04:33 PM
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You need to delete MAP (SAE) from your table display. If you have that running with the 2 bar map it will not display properly. Right click table display > configure user defined.

Name: 2 bar map
abv: 2 bar
Sensor: Manifold absolute pressure
Untis: Kpa

Function : [AUX.20021]

Or just go down to the bottom where it says EIO inputs and insert 2 bar map.

Now setup your chart page to use the 2 bar map accordingly.
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Old Aug 3, 2010 | 06:28 PM
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^^^^ thanks i have added the 2 bar map and will give it a go when i get back from work

also how can i richen up my idle ? it idles in the 18 range until i give it a little bit of gas and then it goes to 13:1

the car is in open loop and will be staying there

thanks again for the help, this is a great forum, nobody in the hp tuners forum likes to help out.
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Old Aug 3, 2010 | 06:48 PM
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Originally Posted by 5 Liter Eater
OK, if it's a 4th gen have you changed the MAP offset and linear to match the 2 bar MAP? Engine Diag, Airflow, 200 linear, 10.33 offset.

Sorry for the thread jack elias, just curious about something he said.

Is the offset of 10.33 good on the ls1/6 pcm as well?? we are never sure if the map is reading "correctly" and were wondering about this.

sorry OP
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Old Aug 3, 2010 | 08:23 PM
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I used an offset of 200 and 8.0 on my friends 04 gto. Honestly man I would try tuning a more stockish car first if you are just starting. There are a ton of things that need to be setup properly to have added safety factors for a boosted setup. Idle afr will be controlled the from the same table all of your open loop speed density tuning will be done. The volumetric efficiency table.
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Old Aug 4, 2010 | 07:06 AM
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unfortunately for me it is the only car i have to practice on

anyway i went to the status display, deleted the sae map sensor

then went insert, used defined,

Name: 2 bar map
abv: 2 bar
Sensor: Manifold absolute pressure
Untis: Kpa

Function : [AUX.20021]

did exactly that and when i started the car, it did not show me anything, the 2 bar map stayed at 0 and none of the histograms worked.

what did i do wrong ?
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