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Old 05-31-2020, 01:50 AM   #1
Hawkeye206
Scooby Newbie
 
Member#: 515217
Join Date: May 2020
Default Just bought a 07 STI and have some questions

I just bought an 07 STI and inspected it after buying it (bad idea) it has been modified a lot. The main harness is wrapped in electrical tape and a lot of it is unplugged. I'm actually wondering if the engine has been swapped from the original EJ257. So that is my first question, how can I tell if it is the original motor? I saw a post saying it's stampd on top of the block but I don't see it anywhere. Here is the motor https://imgur.com/Dy5lkPx The other questions I have go along with pictures I took.

This is a sensor on the passenger side rear of the engine. Not plugged in and didn't see and plug in for it anywhere. https://imgur.com/TeiD2VF

This part was just laying on the driver side of the engine compartment plugged in. https://imgur.com/Dm7wJzk

Is this a oil pressure sending unit of some sort? https://imgur.com/B12quM5

This is on top of the muffler. What is it? https://imgur.com/1xIrHU1

Thanks.
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Old 05-31-2020, 01:50 PM   #2
Ernest
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Member#: 45076
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: Rockland County, NY
Vehicle:
2004 Stg 2 wagon AT
16 BRZ. Both silver

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Who did you buy it from? You should ask them first? Do you know if it has a tune? Did it come with an accessport tuner? Tough to tell from pics. Find your local subie tuner and ask them to go through it, they should be able to tell. Does the car run well?
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Old 05-31-2020, 04:30 PM   #3
Hawkeye206
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Member#: 515217
Join Date: May 2020
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I bought it from a used car dealership. They didnít have a ton of info on it. It runs awesome and has tons of power. I showed a friend what was going on and he was able to see that itís a ej257. He also said itís just emissions stuff unplugged and itís probably got an aftermarket ecu of some sort. Thanks.
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Old 05-31-2020, 07:57 PM   #4
Muffin15
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Member#: 326958
Join Date: Jul 2012
Chapter/Region: NESIC
Location: Portland, Maine
Vehicle:
2006 Impreza WRX
San Remo Red

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#1 and #2 are very likely the secondary air injection pump components. Commonly deleted before/when they fail because they aren't super cheap to replace, usually, and it's just an emissions component for cold starts, anyways. They likely left that part plugged in so the computer still actuates the valves and thinks it's running like normal. If you look at the back of the heads you'll likely find a block-off plate bolted in (one on each side) that looks like the flange on that part that's just hanging out. I wonder if #4 is some sort of exhaust cut-out you can open/close? Usually people put those further up in the exhaust, though, so I'm not sure why it's all the way back at the muffler
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Old 06-03-2020, 11:47 PM   #5
Hawkeye206
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Quote:
Originally Posted by Muffin15 View Post
#1 and #2 are very likely the secondary air injection pump components. Commonly deleted before/when they fail because they aren't super cheap to replace, usually, and it's just an emissions component for cold starts, anyways. They likely left that part plugged in so the computer still actuates the valves and thinks it's running like normal. If you look at the back of the heads you'll likely find a block-off plate bolted in (one on each side) that looks like the flange on that part that's just hanging out. I wonder if #4 is some sort of exhaust cut-out you can open/close? Usually people put those further up in the exhaust, though, so I'm not sure why it's all the way back at the muffler
Just found out what the deal with the muffler is. Itís a motor that turns a flap to adjust the noise of the muffler. https://www.maperformance.com/products/xforce-varex-smartbox-exhaust-control-unit-vksb01
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