kred Posted July 16, 2016 Share Posted July 16, 2016 My car's an 06 LGT. Built motor, big turbo, front mount, etc. I'm running speed density with an AEM IAT sensor and Omni 4 bar map sensor. I got a base map from my tuner on my Cobb AP V3 and start it up. It idles fairly smoothly, but it immediately threw a P2227 (barometric pressure sensor range). And it's idling extremely rich based on my wideband and the smell of unburned fuel. Here's what I know: atmospheric pressure sensor is reading 14.5 psi (which I believe is in the ECU), so that's working. We tried cutting fuel from the map twice and it did nothing. SD MAF is reading between 18-20 g/s on a cold start with the number fluctuating a bit, seems to be working. However, when I log boost, it reads -5.7 psi engine off key forward, at idle, and with a light rev...never seems to change from that. I checked my voltages at the MAP harness, key forward and got 0.02V, 4.35V, and 5.00V, which is exactly what I got when I tested a different LGT, So my wiring seems fine. So basically, what's wrong with my car? :spin: My logical reasoning tells me that as the car is getting a false reading of -5.7psi, it should be reading something more like -9psi I believe. So the car thinks that the incoming air is denser and thus thinks it's getting more air, so it adds a bunch more fuel than it really needs. Could the sensor be junk? Link to comment Share on other sites More sharing options...
west_minist Posted July 16, 2016 Share Posted July 16, 2016 Do you know if he programme for the omni mal? Link to comment Share on other sites More sharing options...
kred Posted July 16, 2016 Author Share Posted July 16, 2016 Do you know if he programme for the omni mal? Yea, definitely. I can tell because with the MAP unplugged key forward, I read boost of 45 psi, the upper limit for a 4 bar MAP sensor. Now that I think of it, the bag says it's an STI map sensor, the harness plugged right in. But is the STI map sensor really plug and play on our cars? Link to comment Share on other sites More sharing options...
west_minist Posted July 16, 2016 Share Posted July 16, 2016 I dont think so. The wrx for sure. The programming seems wrong. With ign on you should atmospheric pressure. Link to comment Share on other sites More sharing options...
kred Posted July 16, 2016 Author Share Posted July 16, 2016 Problem solved. My map sensor harness has ground, signal, and power. The difference is that ground and signal positions are swapped for the STI sensors. Link to comment Share on other sites More sharing options...
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