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Old 07-07-2008, 02:49 PM   #1
s'ko
Scooby Newbie
 
Member#: 54260
Join Date: Feb 2004
Default EJ22T running rich, O2 sensor wires & error codes in all 4 injectors

--------------------------------------------------------------------------------

I am trying to track down a problem on an EJ22T.

I originally had a bad throttle position sensor (TPS) It would run ok, but it was rich.

While messing around with the car, I accidently broke off the knock sensor wire at the plug. I stuck a thick wire into the plug and twisted the sensor wire as a temporary fix. Engine then started to run ridiculously rich. Burning my eyes with the exhaust and it would not rev over 2000rpms. I was also not building any boost b/c the wastegate was open and it would just go down the exhaust. Got two additional error codes the bypass idle air control solenoid and the pressure sensor and pressure exchange solenoid valve. I was not sure what was happening so I tried adjusting the bypass air control solenoid. I am pretty sure I put it back in the right position

Later I went to the junkyard and picked up working TPS and a knock sensor plug. I put in the TPS and the error light went away. I re-wired the knock sensor and shielded the entire wire and the knock error went away. I start the car and it still runs rough. At this time there was no CEL.

Later I get codes for all 4 injectors. Right now it will run and idle rough and I can rev it past 2000rpms and I get boost. But itís still running really rich. Kinda stumped. I left the car w/the battery unplug today and when I get home from work I will hook it up to see if it will start.

One other question, I have a bosch universal O2 sensor with three wires one black, two white. From what I have read, the black wire is the signal wire and the two white wires are the heated wires. Anyone have any idea how to connected it to the Subaru wires? From what I read in the FSM, the white wire is the signal wire for the ECU and the black white is heated ground and the yellow red is heated power. Does it not matter how the two heated wires are connected as long as they complete a circuit?

Would a incorrectly wired O2 sensor case it to run really rich?

Anyone have any idea what else could cause all 4 injectors to throw error codes?

Thanks

BW
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Old 07-08-2008, 04:10 PM   #2
jey
Scooby Specialist
 
Member#: 32503
Join Date: Feb 2003
Chapter/Region: TXIC
Location: Johnson City, TX
Vehicle:
2011 Tribeca
1995 Legacy Wagon

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Quote:
Originally Posted by s'ko View Post
One other question, I have a bosch universal O2 sensor with three wires one black, two white. From what I have read, the black wire is the signal wire and the two white wires are the heated wires. Anyone have any idea how to connected it to the Subaru wires? From what I read in the FSM, the white wire is the signal wire for the ECU and the black white is heated ground and the yellow red is heated power. Does it not matter how the two heated wires are connected as long as they complete a circuit?
Nope, the Bosch Universal sensor's heater has no polarity so it doesn't matter.
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Old 07-09-2008, 08:26 AM   #3
Jonathan
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Member#: 4021
Join Date: Feb 2001
Chapter/Region: NESIC
Location: Natick, MA USA
Vehicle:
1999 Legacy GT Ltd
Quick Silver Metallic

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Maybe the catalytic converter has become somewhat messed up from all this rich running and isnt performing correctly ?
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