yea its shows 890B...

 

If that is correct, it means you aren't getting any signal from your map sensor to the ECU. Check with a volt meter to see if you are getting 5 volts at the sensor plug or plug in your old sensor and see if it logs anything in evoscan.

-Jamie

 

I'm going to check it when I get back home. If it's still not right I know the sensor is faulty. Thanks Dynotech and Reaper

 

looks like there is a crack in the sensor and sucking air

 

My rom 90550701 isn't listed on the first page... Is there anyone with instructions to do this? I'm a bit of a newbie

 

Evo? what year?

 

It's a edm evo 8 ecu with rom 90550701
I should also add that it may not have the usdm map sensor from factory and that it's on my evo 6 now. I have wired in the omni 4 bar already

 

evo 8 can use the 94170015...

 

I've been searching around for a while now and can't seem to find the map sensor definition tables for my JDM IX MR...80920002 (inherits 88570008)
I just installed an Omni 4 bar and am unable to rescale it because the tables aren't defined. Seems as if this thread is dedicated towards the USDM...any help would be greatly appreciated.

 

Any ideas why I would throw a P0069 code? I replaced the map sensor with a brand new one, and also checked with my tuner to make sure the sensor was scaled for -

 

Typical Causes of the P0069 code:
- Manifold Absolute Pressure sensor harness open or shorted to ground
- Manifold Absolute Pressure sensor poor electrical connection
- Faulty Barometric Pressure (BARO) sensor
- Faulty Manifold Absolute Pressure (MAP) sensor
- Faulty Engine Control Module (ECM)

If its a new sensor I would start looking at the connector its self or try logging the sensor to see what its doing. Some logs would tell you if its reading and if so, if its reading correctly.

 

Must have some kind of harness/electrical issue then. I'll take a look. i do NOT want to just turn the code off in the ECU

 

Hi there!

I recently ordered an omni 4 bar for my EDM IX. I have a V7 installed (88580714) but I can't find the right Map sensor addresses to set it up properly.

Can someone provide me that?

Thanks

 

I'm a little stumped on this and wanted to share my experience. Since the extreme cold came in, I started to get a DTC P0107: Manifold Absolute Pressure Circuit Low Input.

Check Conditions
- Engine Coolant Temperature is 32 degF / 0 degC or less at key on
- 8 minutes since starting sequence was completed
- Volumetric efficiency greater than 20%

Judgement Criteria
- Manifold absolute pressure is 5 kPa (1.5 in-Hg) or less for 2 seconds

Service manual lists the following as most likely solutions:
- Bad MAP sensor
- Open or shorted MAP sensor circuit, damaged harness or connector
- Failed ECM

I've had my Omni 4bar for a few years and assumed it was the sensor. Got a new one (keeping the old one), installed it and had the same results. I put the "failed" one back in (hope to sell the new one once I have this figured out) and started further troubleshooting.

Verified EvoScan values: as anticipated across all speeds / matched boost gauge
Measured Voltage supplied to the sensor: 5V
Verified continuity from ECM to sensor: Check
Measured signal voltage (with breakout harness), engine off: 1.17V (~100 kPa)
Removed pin into ECM and measured signal voltage: 1.17V (~100 kPa)

Now here's where it gets interesting, I borrowed a buddies OBD scan tool and used "View data" and here's what it displayed for MAP:
Engine off - 30 kPa
Idle - 10-12 kPa
Decel on Highway (6th gear, closed throttle, ~3000 RPM) - as low as 4 kPa

Has anyone experienced this? Is there a separate set of scales for standard OBD communications? Any way to change the coolant temp threshold? Any other suggestions? (Please don't say boost leak check - this would cause it to read higher pressure.)

Thanks for the help. Sorry it's so long.

Paul

 

unless im converting the numbers wrong, isn't your scan tool showing near 0 vacuum under engine decal, and vacuum when the engine is off? 0 vacuum is 0 kpa, right? then you should have negative kpa at idle, and even more on the engine decel. or am I converting this wrong?