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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > HELP - injector install gone wrong



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      Today, 03:49 PM   #1
kevlarblue
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HELP - injector install gone wrong

I suspected a leaking injector and I was able to source 3 new index -12s so I installed them into cylinders 2, 5 and 6 (I know, I should do all 6 but $$$). I installed them with no issues and coded them with Protool and started the car. It was only running on 3 cylinders and immediately threw 2E3X Fuel Injector, Cylinder X Activation on cylinders 2, 5 and 6.

When I shut it off and looked under the hood there was a puddle of fuel around each of the new injectors, I am not exactly sure what part of the injector/head the fuel came from because I wasn't able to watch from the driver's seat.

Did I do something wrong? Are the injectors bogus? How could fuel end up on top of the head instead of in the combustion chamber?

Yes, they were seated all the way down just like the other 3 injectors and I had the retaining clip tightened all the way down. I open to any ideas before I go back to all of my original injectors.

Fuel on top of the head:
https://photos.google.com/photo/AF1Q...qEGLx4ips2pscX

Old Injector on left, new on the right:
https://photos.google.com/photo/AF1Q...pWlCIUIyQzbu78

Back of old injector (left) and new (right)
https://photos.google.com/photo/AF1Q...GLuZ7valN1SJ1Q
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      Today, 05:00 PM   #2
konstat
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Quote:
Originally Posted by kevlarblue View Post
I suspected a leaking injector and I was able to source 3 new index -12s so I installed them into cylinders 2, 5 and 6 (I know, I should do all 6 but $$$). I installed them with no issues and coded them with Protool and started the car. It was only running on 3 cylinders and immediately threw 2E3X Fuel Injector, Cylinder X Activation on cylinders 2, 5 and 6.

When I shut it off and looked under the hood there was a puddle of fuel around each of the new injectors, I am not exactly sure what part of the injector/head the fuel came from because I wasn't able to watch from the driver's seat.

Did I do something wrong? Are the injectors bogus? How could fuel end up on top of the head instead of in the combustion chamber?

Yes, they were seated all the way down just like the other 3 injectors and I had the retaining clip tightened all the way down. I open to any ideas before I go back to all of my original injectors.

Fuel on top of the head:
https://photos.google.com/photo/AF1QipNX2DsQcZOp4j1yeKtC1gnPxcqEGLx4ips2pscX

Old Injector on left, new on the right:
https://photos.google.com/photo/AF1QipMMvfV1vVzSwHe3DAFtkO9efKpWlCIUIyQzbu78

Back of old injector (left) and new (right)
https://photos.google.com/photo/AF1QipP6EE3PSSb06s74daAw6RtMZsGLuZ7valN1SJ1Q
Did you torque the fuel line that runs across the valve cover to spec? The lines also have to be seated properly in the fuel rail and the injector.

Those lines can only be reused 5 times (forget the exact number) before they need to be replaced.

Last edited by konstat; Today at 05:02 PM..
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      Today, 07:00 PM   #3
dmckmc
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can't open the pics so this is a general thing to check. i've seen several times on the forums where the injector hold down clips were replaced upside down and not providing enough force to hold them. keep at it, you'll likely figure it out. we've all struggled with a simple repair gone wrong. like when i dropped a valve fully into the cylinder when changing valve seals!
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