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Old 05-19-2013, 12:45 PM   #1
oZ Killasubaru Zo
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Default Need some help. PO340 keeps coming back.

Hey whats going on guys.

Heres my issue, I have a stage 2 set up(M2 TBE, Mugan Up pipe, Grimspeed Boost control, and a tune by Tach Motor Works. Im boosting 17psi out of a stock turbo.) Recently I spun a bearing in my motor so I sent out my motor to a machine shop and got it rebuilt. Replaced the the pistons and rods with Mahle forged Pistons and eagle forged rods. bored out the block if I am not mistaken The compression ratio is 8.2 to 1. After the motor was put back in and I started it up, I got the PO340 (Camshaft sensor A bank 1 or single sensor). So I did my research and found just replaced it. But I am still getting that code but it isn't consistent. Sometime it turns on the check engine light, sometime it just flashes or sometimes it doesn't even come on( I keep reseting the check engine light). I don't know if this affects my boost because my turbo has a hard time boosting. I was just thinking Would I have to get a retune? or is it something else? any advise would help guys thanks!!
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Old 05-19-2013, 02:54 PM   #2
oZ Killasubaru Zo
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bummpppp
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Old 05-19-2013, 06:35 PM   #3
oZ Killasubaru Zo
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Bumppppppppppppp
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Old 05-20-2013, 08:43 AM   #4
Paul
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check the wiring at the sensor and try to clean the connections
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Old 05-20-2013, 10:36 AM   #5
Coop1103
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Having same issue being checked literally as we speak....on a built engine. I'll let you know. Could be as simple as cleaning a solenoid to a crucial sprung bearing.
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Old 05-20-2013, 04:22 PM   #6
oZ Killasubaru Zo
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Quote:
Originally Posted by Coop1103 View Post
Having same issue being checked literally as we speak....on a built engine. I'll let you know. Could be as simple as cleaning a solenoid to a crucial sprung bearing.
Yea one guyy told me to check the timing but I didnt get the chance to do it yet. Did you check your timing belt??
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Old 05-20-2013, 04:45 PM   #7
bebesito21
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What motor is this on? Is it a non avcs motor? If so check the distance between the sensor and the pick up. They are picky has to be just right
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Old 05-20-2013, 04:58 PM   #8
Coop1103
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I logged my avcs banks and sure enough bank one was reading 8 degrees. Left was fine at 23. Log it with the ap.
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Old 05-20-2013, 05:05 PM   #9
jkopinga
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Are you sure you didn't jump a teeth on that particular pulley?
The Engine is using the LH head AVCS sensor also fo PHASE signals to determine the phase of the engine for full sequential 720* fueling.
Make sure signal is good. It's a HALL sensor so it's waveform should be a square wave of 0-5V which is active LOW. EG... when there is NO tooth it is HI (5V) and when there is a tooth it is LO (0V). Check those signals first and see what you find.
Anything I can help you with, please let me know.

Cheers,

Jasper.
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Old 05-20-2013, 10:32 PM   #10
Coop1103
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So the problem ending up being the main connector going to the strut tower now sits under turbo inlet. The lock came undone and I think it was backing the pin out.
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Old 05-21-2013, 12:29 AM   #11
oZ Killasubaru Zo
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lol well coop1103 I'm glad you fixed your problem. I in the other hand am still in square 1. lol.
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Old 05-21-2013, 12:31 AM   #12
oZ Killasubaru Zo
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Quote:
Originally Posted by Paul View Post
check the wiring at the sensor and try to clean the connections
I will give it a shoot tomorrow as soon as i get a chance.
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Old 05-21-2013, 12:35 AM   #13
oZ Killasubaru Zo
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Quote:
Originally Posted by bebesito21 View Post
What motor is this on? Is it a non avcs motor? If so check the distance between the sensor and the pick up. They are picky has to be just right
I have an 02 wrx so I am assuming that I don't have a AVCS.
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Old 05-21-2013, 02:33 AM   #14
Coop1103
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UGM

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Shoot I didn't notice that at first. Yea I believe you do not have avcs. Please post your findings and wish you luck man. With this car problems never seem to be easy
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Old 05-21-2013, 11:20 PM   #15
oZ Killasubaru Zo
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Rally blue

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Quote:
Originally Posted by Coop1103 View Post
Shoot I didn't notice that at first. Yea I believe you do not have avcs. Please post your findings and wish you luck man. With this car problems never seem to be easy
My tuner seems to think the machine shop that built my motor my have not put the camshaft in the way they are supposed to go in so they recommended me to pull the valve cover off and check to make sure that it is on right.
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Old 05-21-2013, 11:32 PM   #16
Coop1103
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Keep us posted. Curious....
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Old 05-21-2013, 11:35 PM   #17
oZ Killasubaru Zo
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Will do!
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Old 05-30-2013, 01:04 PM   #18
oZ Killasubaru Zo
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Okay heres the update. I checked the connector to the cam sensor. it was clean and i check the pins and they are fine. I did pull off the timing belt cover and found that when i line up my crankshaft gear to the mark and check the cam gear to see if they were lined up right. what I found was the passenger side ca gears line up but the drivers side cam gears are off by less then a quarter of a turn. I ask a performance shop about this and he told me the after you set the timing and rotate the motor, the gears wont line up again. I asked why and he said that is just how the subie motors are. I am having a hard time believing that. then he told me to replace my fuel pump and start from there. what do you guys think any help would be greatly appreciated!
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Old 05-30-2013, 03:35 PM   #19
oZ Killasubaru Zo
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bummppppppp
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