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FUBAR front 02 sensor?

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Old 02-05-2013, 10:28 AM
  #126  
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O2 sensors have 4 wire connectors FYI, so thats ruled out.
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Old 02-05-2013, 10:29 AM
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Originally Posted by Cliffjumper126
I'm reading about how to take the UIM off and I found this picture of what I was talking about, I'm wondering if the connector that's loose on my car is the one underneath the three in the picture
Maybe, only way to know for sure is to remove the UIM IMO
But hold on a bit ...

Rorschach is going to go out at lunch and check what he's got ... dunno maybe his UIM is a part or something.

I've posted your thread in the B@W thread to get more eyes on that connector pic.
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Old 02-05-2013, 10:29 AM
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It looks like the rearmost fuel injector connector..that is the only thing that looks like that back there on the harness
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Old 02-05-2013, 10:30 AM
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Originally Posted by Carbon8
O2 sensors have 4 wire connectors FYI, so thats ruled out.
Ohhh right .. I'm soo stupid, I should of thought of that
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Old 02-05-2013, 10:31 AM
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Originally Posted by Cliffjumper126
Haha watch this connector belong to a fuel injector or something and be the root of my problem. I wouldn't put it past the previous owner to have forgotten to connect it when he put the motor in... I would be pissed. What are the those three connectors I mentioned for?
3 connectors are for SSV, VDI and SecAir Solenoids..
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Old 02-05-2013, 10:31 AM
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Originally Posted by Carbon8
O2 sensors have 4 wire connectors FYI, so thats ruled out.
Yeah that's what I meant when I said the 02 connector was larger lol
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Old 02-05-2013, 10:33 AM
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Originally Posted by dannobre
It looks like the rearmost fuel injector connector..that is the only thing that looks like that back there on the harness
Abnormal for an injector plug to be bent back, but it is what is appears to be.
Mildly important, might want to look into it
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Old 02-05-2013, 10:34 AM
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Originally Posted by dannobre
It looks like the rearmost fuel injector connector..that is the only thing that looks like that back there on the harness
Wow that seems like it could definitely cause power loss haha. The connector is part of the same harness as those three vertical connectors in the picture, which are apparently the 3 connectors for SSV, VDI and SecAir Solenoids..
Last edited by Cliffjumper126; 02-05-2013 at 10:36 AM.
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Old 02-05-2013, 10:42 AM
  #134  
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It is a Denso injector plug...so that's all it could be

That would cause power loss all right ..look for a yellow injector with nothing plugged into it
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Old 02-05-2013, 10:59 AM
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Originally Posted by dannobre
It is a Denso injector plug...so that's all it could be

That would cause power loss all right ..look for a yellow injector with nothing plugged into it
Ugh that means I'll have to take my UIM off after all

But at least I know what it is! Thanks!
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Old 02-05-2013, 11:01 AM
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Originally Posted by Cliffjumper126
Wow that seems like it could definitely cause power loss haha. The connector is part of the same harness as those three vertical connectors in the picture, which are apparently the 3 connectors for SSV, VDI and SecAir Solenoids..
Thats very generic statement considering there's a lot more in the engine harness which is what your referencing, but agreed its an injector connector, i'd guess at your rear secondary injector plug to narrow it down a little more
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Old 02-05-2013, 11:27 AM
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You should be able to get at it..feel down the fuel rail and it is just under it on the end.

You might want to take the UIM off anyway and have a good look around. Make sure all the manifold seals are in place and not pinched or something
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Old 02-05-2013, 11:32 AM
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Ok thanks everybody. I'll take a go hopefully tonight and let you guys know what happens
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Old 02-05-2013, 12:39 PM
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Lol yeah, not O2... I'd just woken up so I'll use that as an excuse.

But that means our problems might not be related if it is in fact an injector plug because I've had my fuel rails out and reinstalled them since the problem started so all mine are good for sure.

Can't wait to see what it is though... For the UIM, the key is to use this setup...

Socket --> 3in extension --> universal --> another extension --> ratchet
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Old 02-05-2013, 12:45 PM
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Originally Posted by roflcopter
Lol yeah, not O2... I'd just woken up so I'll use that as an excuse.

But that means our problems might not be related if it is in fact an injector plug because I've had my fuel rails out and reinstalled them since the problem started so all mine are good for sure.

Can't wait to see what it is though... For the UIM, the key is to use this setup...

Socket --> 3in extension --> universal --> another extension --> ratchet
They may not be related, but my car does seem to run smoother and have more power with the new sensor, it just didn't fix my problem like I hoped. I sure hope this fixes it though
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Old 02-05-2013, 01:03 PM
  #141  
.. but can it blend?
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I hope this helps

Name: DSC01892.jpg Views: 60 Size: 65.9 KB
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Old 02-05-2013, 01:09 PM
  #142  
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Oh no its naked, someone was fondling your connectors
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Old 02-05-2013, 01:11 PM
  #143  
.. but can it blend?
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Originally Posted by Carbon8
Oh no its naked, someone was fondling your connectors



Not my own pic, found it in an old thread back in '09, it's in regards to upgrading the fuel injectors for a greddy turbo kit. Best I could find that showed the fuel injectors since I couldn't get a clear shot of mine in the parking lot lol.

page 2, post 39
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Old 02-05-2013, 01:29 PM
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Originally Posted by Rorschach



Not my own pic, found it in an old thread back in '09, it's in regards to upgrading the fuel injectors for a greddy turbo kit. Best I could find that showed the fuel injectors since I couldn't get a clear shot of mine in the parking lot lol.

page 2, post 39
Looks like that connector with the blue wires in the upper left of the pic
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Old 02-05-2013, 01:33 PM
  #145  
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the connector with blue and white wires go to your 2nd injector.
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Old 02-05-2013, 01:38 PM
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Originally Posted by Rorschach
the connector with blue and white wires go to your 2nd injector.
I bet that's it then...I just don't see reaching that without taking the UIM off
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Old 02-05-2013, 01:40 PM
  #147  
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Its really not that hard, max should take you about an hour. couple of bolts and connectors.
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Old 02-05-2013, 01:42 PM
  #148  
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just take your time with it and you'll be okay bring some beer
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Old 02-05-2013, 05:18 PM
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I got it off! I'd like to go throw some bricks through the windows of the new Benz that the previous owner bought because sure enough there was a lonely yellow
injector with nothing plugged into it. I'm grabbing and drink and putting it back together. I'm crossing my fingers!
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Old 02-05-2013, 05:20 PM
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You might want to check and see if they are in the correct position as well...it is easy to mix up the rear primary and the one that is off...check where it comes off the harness..and the wire colors
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