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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 > AFE intake causing issues for anyone?



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      12-18-2013, 04:56 AM   #1
wonton1017
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AFE intake causing issues for anyone?

I had the AFE dual intakes stage 2 with the heatshield, not the enclosed one. I thought my JB4 was causing a slight delay on warm startups but after removing it last night, all the delays were gone no matter when I start the car.

In addition to that, I was only hitting 11psi tops for a very short period of time. With the stock intake, I am hitting 12-13psi for a noticeably longer period of time.

Not sure if that made sense but just wanted to see if AFE intake was the problem?
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      12-18-2013, 07:49 AM   #2
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It's not.
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      12-18-2013, 08:26 AM   #3
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Unless the intake source is stupid restrictive, there’s no way it could cause an underboost condition. It’s not the intake OP.
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      12-19-2013, 02:41 PM   #4
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Most likely install error. But what map are you using on your JB4? The AutoTune may slightly reduce the boost target because you now have a free flowering intake (vs the OEM airbox).

Last edited by Mit_Boost; 12-20-2013 at 01:13 AM.
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      12-19-2013, 03:47 PM   #5
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It must be an install error
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      12-19-2013, 05:12 PM   #6
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did u reset adaptations after installing AFE
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      12-19-2013, 06:25 PM   #7
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Was on map 5, auto tune.

Nope I didn't reset adaptations, was told it wasn't needed.

I installed the intake properly for sure. I mean there isn't anything to miss, everything was tight and everything aligned including the rubber grommets.

Will try with my new intake this weekend and see if it does the same :S
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      12-19-2013, 06:27 PM   #8
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You could take the intake off and the car should still perform the same way. It's just a filter at the end of the day and since this car doesn't use a MAF there really is no reason for it to run any differently. The only change between different intakes is the intake air temps and the restriction from different filter mediums and openings which can vary the WGDC a few %.

Best bet is to reset adaptation and get some logs.
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