Atmospheric Pressure Sensor - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Cal3000 · 02-05-2018, 10:34 PM

Does anyone know where this is? When I log, I'm getting really low readings, like 74kpa and the car runs like crap. I wan't to try to replace it to see if it remedies the issue.
I'm on the Vortech kit.

Kodename47 · 02-06-2018, 03:29 AM

If memory serve correctly, the USDM cars use the CPC sensor to monitor atmo pressure. If you've repurposed the CPC sensor in EcuTek then the atmo pressure is derived from the MAP sensor I believe.

Cal3000 · 02-07-2018, 01:10 AM

Quote:

Originally Posted by Kodename47

If memory serve correctly, the USDM cars use the CPC sensor to monitor atmo pressure. If you've repurposed the CPC sensor in EcuTek then the atmo pressure is derived from the MAP sensor I believe.

Thanks. What exactly is the CPC sensor? Where is it located? What does CPC stand for. I'm searching online and I can't get any clear info. ;/

If the atmospheric pressure is derived from the MAP, then that would mean I may have a faulty MAP if the atm pressure is off?

Hags86 · 02-07-2018, 03:01 AM

Are you sure there an atmospheric pressure sensor at all? I thought there is just the MAP in the inlet manifold.

The MAP also has inlet air temp and there is a outside air temp (but this only makes it as far as the dash - probably gets CAN'd across the the ECU from there).

Kodename47 · 02-07-2018, 05:12 AM

Quote:

Originally Posted by Cal3000

Thanks. What exactly is the CPC sensor? Where is it located? What does CPC stand for. I'm searching online and I can't get any clear info. ;/

If the atmospheric pressure is derived from the MAP, then that would mean I may have a faulty MAP if the atm pressure is off?

Charcoal Purge Canister. That input is often reused on EcuTek for FlexFuel/WBO2 etc. There is an option in EcuTek to switch USDM pressure readings to "the rest of the world" setup. Some tuners may do this by default if they run tunes that may use the CPC input for FF.

Quote:

Originally Posted by Hags86

Are you sure there an atmospheric pressure sensor at all? I thought there is just the MAP in the inlet manifold.

The MAP also has inlet air temp and there is a outside air temp (but this only makes it as far as the dash - probably gets CAN'd across the the ECU from there).

US cars are different to the Euro/Aus cars. We don't have a CPC sensor so it uses the MAP sensor reading at startup.

Also, the MAP does not have Intake Air Temp. That's on the MAF sensor.

Hags86 · 02-07-2018, 05:25 AM

Quote:

Originally Posted by Kodename47

Also, the MAP does not have Intake Air Temp. That's on the MAF sensor.

I stand corrected. Thank you. I knew there was a reason the MAF was still installed but didn’t recall what it was (I have a speed density tune and the ariflow part of the MAF is no longer connected).

G_Rossney · 01-10-2022, 10:03 PM

Where are these terminal blocks. I can' seem to find them and these instructions from Delicious Tuning don't give you much detail!

x808drifter · 01-11-2022, 11:18 AM

Quote:

Originally Posted by G_Rossney

Where are these terminal blocks. I can' seem to find them and these instructions from Delicious Tuning don't give you much detail!

"Use caution when connecting the auxiliary inputs to ensure the correct ECU pins are used."

02-05-2018, 10:34 PM	#1
Cal3000 Senior Member Join Date: Dec 2012 Drives: Panda FR-S Location: Corona, California Posts: 531 Thanks: 297 Thanked 377 Times in 161 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Atmospheric Pressure Sensor Does anyone know where this is? When I log, I'm getting really low readings, like 74kpa and the car runs like crap. I wan't to try to replace it to see if it remedies the issue. I'm on the Vortech kit. __________________ Vortech SC on 9psi Pulley, Invidia Catless Front Pipe, Invidia N1 Catback Exhaust 242whp/197ft-lb on Mustang Dyno (91 octane water) 284whp/223ft-lb on Mustang Dyno (E85) Delicious Tuning

02-06-2018, 03:29 AM	#2
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,629 Times in 1,112 Posts Mentioned: 155 Post(s) Tagged: 1 Thread(s)	If memory serve correctly, the USDM cars use the CPC sensor to monitor atmo pressure. If you've repurposed the CPC sensor in EcuTek then the atmo pressure is derived from the MAP sensor I believe. __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

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02-07-2018, 03:01 AM	#4
Hags86 Senior Member Join Date: Mar 2013 Drives: Toyota GTS 86 Location: Melbourne Australia Posts: 243 Thanks: 21 Thanked 118 Times in 65 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Are you sure there an atmospheric pressure sensor at all? I thought there is just the MAP in the inlet manifold. The MAP also has inlet air temp and there is a outside air temp (but this only makes it as far as the dash - probably gets CAN'd across the the ECU from there).

01-10-2022, 10:03 PM	#7
G_Rossney Member Join Date: Apr 2013 Drives: 2013 BRZ, Limited, 6spd MT, GBS Location: Gardean, CA Posts: 63 Thanks: 7 Thanked 10 Times in 8 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Where are these terminal blocks. I can' seem to find them and these instructions from Delicious Tuning don't give you much detail!

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