2bar Map not reading right
Jul 24, 2010 | 11:02 AM
#1
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From: Cedar, MN
2bar Map not reading right
I did the 2bar map on the truck a few days ago, now with the key on engine off, I am only reading about 80 kpa. I used to see 97 with the 1bar map. Now obviously my pe and be calculations are off. Any help would be appreciated!
Jul 24, 2010 | 11:18 AM
#2
I'm no tuner, but I assume it needs a calibration? New sensors typically aren't just drop in, so the voltage output will be different from the stock sensor under the exact same conditions.
Jul 24, 2010 | 02:28 PM
#4
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From: Cedar, MN
Yes, I deleted the 1bar and added the 2bar, my scanner says 80kpa while my boost gauge is right at 0, and when I am driving it, the boost gauge is at zero while the scanner is at around 80-85kpa. Also, this is the oem 2bar sensor from gm that alot of others here are using.
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Jul 25, 2010 | 10:42 AM
#9
How did you setup the MAP sensor scaler in the tune? From the EFILIve Custom OS tutorial:
• {C6301} MAP Sensor Scaler: 2-bar sensor: 190, 3-bar sensor: 288
These values will get the MAP scaler’s value close to what it needs to be, you will then need to adjust it (by small amounts) until the MAP sensor reads the same barometric pressure that your standard 1-bar sensor was reading at key-on, engine-off.
Configuring a 2 or 3-bar MAP sensor
When the key is on but the engine is not running, the MAP sensor reads the barometric air pressure, usually 101kPa (14.7psi). When tuning in high altitude areas it is worthwhile reading the MAP values (using EFILive’s Scan Tool) at key-on with the standard 1-bar sensor to obtain the barometric pressure at the current altitude.
After fitting your 2 or 3-bar MAP sensor, you must rescale the MAP sensor.
Engine Diagnostics->MAP->Parameters
When the key is on but the engine is not running, the MAP sensor reads the barometric air pressure, usually 101kPa (14.7psi). When tuning in high altitude areas it is worthwhile reading the MAP values (using EFILive’s Scan Tool) at key-on with the standard 1-bar sensor to obtain the barometric pressure at the current altitude.
After fitting your 2 or 3-bar MAP sensor, you must rescale the MAP sensor.
Engine Diagnostics->MAP->Parameters
• {C6301} MAP Sensor Scaler: 2-bar sensor: 190, 3-bar sensor: 288
These values will get the MAP scaler’s value close to what it needs to be, you will then need to adjust it (by small amounts) until the MAP sensor reads the same barometric pressure that your standard 1-bar sensor was reading at key-on, engine-off.
Logging boost levels in the Scan Tool must be performed with the PID ‘SAE.MAP’.
Jul 25, 2010 | 06:05 PM
#10
Thread Starter
11 Second Truck Club
iTrader: (7)
Joined: Nov 2007
Posts: 800
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From: Cedar, MN
How did you setup the MAP sensor scaler in the tune? From the EFILIve Custom OS tutorial:
• {C6301} MAP Sensor Scaler: 2-bar sensor: 190, 3-bar sensor: 288
These values will get the MAP scaler’s value close to what it needs to be, you will then need to adjust it (by small amounts) until the MAP sensor reads the same barometric pressure that your standard 1-bar sensor was reading at key-on, engine-off.
Configuring a 2 or 3-bar MAP sensor
When the key is on but the engine is not running, the MAP sensor reads the barometric air pressure, usually 101kPa (14.7psi). When tuning in high altitude areas it is worthwhile reading the MAP values (using EFILive’s Scan Tool) at key-on with the standard 1-bar sensor to obtain the barometric pressure at the current altitude.
After fitting your 2 or 3-bar MAP sensor, you must rescale the MAP sensor.
Engine Diagnostics->MAP->Parameters
When the key is on but the engine is not running, the MAP sensor reads the barometric air pressure, usually 101kPa (14.7psi). When tuning in high altitude areas it is worthwhile reading the MAP values (using EFILive’s Scan Tool) at key-on with the standard 1-bar sensor to obtain the barometric pressure at the current altitude.
After fitting your 2 or 3-bar MAP sensor, you must rescale the MAP sensor.
Engine Diagnostics->MAP->Parameters
• {C6301} MAP Sensor Scaler: 2-bar sensor: 190, 3-bar sensor: 288
These values will get the MAP scaler’s value close to what it needs to be, you will then need to adjust it (by small amounts) until the MAP sensor reads the same barometric pressure that your standard 1-bar sensor was reading at key-on, engine-off.
Logging boost levels in the Scan Tool must be performed with the PID ‘SAE.MAP’.
