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Old 02-05-2016, 11:39 AM   #1
Dkrazykracker32
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Default 2011 Wrx Fresh Rebuild but Wtf Issue.

Ladies and gents, I give you my biggest wtf moment ever. Ive searched like crazy but am straight up flabbergasted at this point. We'll start with the basics.
2011 WRX
Stage 2 (Cobb dp, catted cat back, and intake)
Roughly 38k miles
Spun rod and main bearings.

Pulled engine, new bearings, turned rods, etc (you know the drill)

I got everything back installed, grounds connected, all the sensors hooked up, antifreeze, oil, ps fluid, everything looks good.

Go to turn the key and nada. Throw on a charger and after its charged up try again and nothing, no power at the starter or fuel pump.
But here's where it gets weird. I read I should try flashing back to stock so I did. As soon as the accessport fires up, key forward everything starts responding and the car starts, for two seconds and then dies.
The check engine light kicks on, as does the security light and the code is a p1572 imm circuit failure.
Pulled the tuner off and boom back to a dead key, (and as soon as it's unplugged a buzzing sound comes from the glove box area until the plug touches the obd2 and it quits.)
I have tried researching which route to take here and even contacted Cobb for advice (a fellow mechanic recommended a factory reset due to the battery being disconnected nearly two months) and they mentioned a ground. I've gone through and double checked but can't find anything out of place.

I know it's a stretch but I'm looking for literally anything that can shed light on the issue.
Gonna try my other key (in case the chip messed up or something) but otherwise I'm at a loss.

Thanks in advance.
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Last edited by Dkrazykracker32; 02-05-2016 at 11:50 AM.
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Old 02-05-2016, 12:46 PM   #2
darkstarmoto
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Start simple, do yo have other keys on your key ring with transponders? If you do, remove them and see if that helps (FSM notes this in Immobilizer diagnostics).

Also, make sure your battery isn't dropping below 10V while cranking...if it was dead you could have a bad cell which doesn't show up until cranking.
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Old 02-05-2016, 12:49 PM   #3
Dkrazykracker32
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Quote:
Originally Posted by darkstarmoto View Post
Start simple, do yo have other keys on your key ring with transponders? If you do, remove them and see if that helps (FSM notes this in Immobilizer diagnostics).
No sir, this one was my spare key so just the subi key and alarm box.
Thanks for the quick response though 😊

I'll check into that. It's not very old but with the way this has been going I wouldn't count out anything.
We did start it while jumping it with my uncles 06 f350 if that helps.
It's just the fact that there's nothing without the tuner plugged in that gets me.

Last edited by Dkrazykracker32; 02-05-2016 at 01:11 PM.
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Old 02-05-2016, 01:07 PM   #4
Mitchwrxpaps
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Sounds like a bad ground somewhere.

On a side note, did you pull the motor and replace the internals? or did you just replace the entire short block?
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Old 02-05-2016, 01:13 PM   #5
Dkrazykracker32
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Quote:
Originally Posted by Mitchwrxpaps View Post
Sounds like a bad ground somewhere.

On a side note, did you pull the motor and replace the internals? or did you just replace the entire short block?
Pulled the motor and replaced the bearings.
I tripled checked and have one ground to the bottom of the block (driver side) one to the passenger side valve cover (this is the only one I'm unsure of) and one to the starter at the block/tranny.
Anywhere else I should look? Or maybe the valve cover ground is where I'm having issues? I just didn't see anywhere else to bolt it.

Last edited by Dkrazykracker32; 02-05-2016 at 01:28 PM.
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Old 02-05-2016, 01:22 PM   #6
Mitchwrxpaps
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Quote:
Originally Posted by Dkrazykracker32 View Post
Pulled the motor and replaced the bearings.
I tripled checked and have one ground to the bottom of the block (driver side) one to the passenger side valve cover (this is the only one I'm unsure of) and one to the starter at the block/tranny.
You relplaced bearings on a blown shortblock? I wonder how long that will last....

Make sure the grounds are making GOOD connections. A ground with a poor connection is pretty much like not having a ground at all.
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Old 02-05-2016, 01:34 PM   #7
Dkrazykracker32
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Originally Posted by Mitchwrxpaps View Post
You relplaced bearings on a blown shortblock? I wonder how long that will last....

Make sure the grounds are making GOOD connections. A ground with a poor connection is pretty much like not having a ground at all.
I'll check the grounds again.
As much as I'd have preferred to stab a new short block (would've been way easier too) I'm very limited on funds.
Tore it all the way down, had the rods and mains turned, threw in new bearings rings and gaskets and then put it back together.
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Old 02-05-2016, 01:57 PM   #8
darkstarmoto
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Did you get the 2 ground wires on the intake manifold (right next to the throttle body)? I think they both go under the same bolt.
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Old 02-05-2016, 02:01 PM   #9
Dkrazykracker32
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Maybe I missed that, I'll check as soon as I get off work.
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Old 02-05-2016, 07:50 PM   #10
Dkrazykracker32
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Quote:
Originally Posted by darkstarmoto View Post
Did you get the 2 ground wires on the intake manifold (right next to the throttle body)? I think they both go under the same bolt.
Any chance anyone can snag a pic of this? It's hard to see anything under the intake so it would help to see why I'm looking for.
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Old 02-05-2016, 08:57 PM   #11
Dkrazykracker32
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Pm'd you darkstar


Thanks for the help yall. It was the ground on the drivers side near the throttle body as predicted.
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