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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 with JB4 install



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      05-18-2013, 07:06 PM   #1
Fillyo75
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help with JB4 install

I am stuck on my install. I cannot see to get the large ECU connector to slide back in and close the slider. I had no problem with the small ECU connector. So, I put the stock subconnectors back in, and the large ECU connector goes in no problem. So i tried them individually, I put in the large subconnector, and I was able to slide in back in and close the slider, so then I tried the small subconnector only, and the ECU connector would not slide back in and close. So, I have isoldated the issue to the small subconnector that goes in the large ECU connector. This is brand new, so not sure if I got a bum connector. Anyone else have a similiar issue?
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      05-18-2013, 07:20 PM   #2
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I had issues until I slid the ECU up out of the box about 2-3" so I could get a better angle on the plugs, then it went right together.
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      05-18-2013, 07:22 PM   #3
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First time is like that, you need to have the slider in the right position, just take yuour time push it down and lock it. If i managed it u surely can.....
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      05-18-2013, 08:33 PM   #4
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Make sure the slider is fully extended (all the way to the left) before you even start pushing it in. In order to do that, you need to pull the ECU up an inch or two to make room.

Just carefully examine how the slider on the connector works and it will make more sense.
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      05-18-2013, 09:53 PM   #5
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I figured out, had wrong connector, looked at black clip instead of black wires.! Install of dci and Jb4 done, it's incredible!
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