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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 06-12-2014, 06:37 PM   #1
ogsk8r
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Idle issue

When I come to a stoplight, the idle on my car goes up n down over and over and feels like it's gonna stall out, but then it jumps up to 1000, then when I just tap the gas, it will stall. It always starts right back up, but does anyone know why it's doing this ? It doesn't go past 1000 rpm so it's not that bad, but it's annoying. Thanks to anyone for any info.


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Old 06-12-2014, 06:48 PM   #2
Solidjake
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Start by taking out you intake boots and inspecting them for any cracks/tears. Clean your ICV as well.

You can use my vid to guide you

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Old 06-12-2014, 07:01 PM   #3
ogsk8r
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I so do appreciate the info. Thanks !!!!


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Old 06-12-2014, 07:10 PM   #4
Solidjake
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Also curious, what was your fuel level at that time?
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Old 06-12-2014, 07:12 PM   #5
ogsk8r
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I never really let my gas drop below 1/4 tank and run supreme. Also, is there audio on this vid ?? For some reason I had the volume all the way up and it was completely silent.


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Old 06-12-2014, 07:15 PM   #6
Solidjake
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Double check that the volume icon itself on youtube is up and not muted.

Good, so I think we can rule out any fuel related issue unless your mileage is high and the pump/filter were never replaced.
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Old 06-12-2014, 08:52 PM   #7
ogsk8r
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I have 140 on the car but the engine was replaced by BMW at 70,000 miles. Not sure if the fuel filter has ever been changed but I'm sure that may be an issue as well.


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Old 06-13-2014, 12:31 AM   #8
330i4me
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mass air meter
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Old 06-22-2014, 03:39 PM   #9
BimmerBoy34
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Idle Air Control Valve. Mine had the same problem.


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Old 06-27-2014, 07:52 PM   #10
jhutchhh
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Could be your mass air flow sensor or possibly your intake cam position sensor. Id take it an have an obd hooked up to read the code if your engine light is on


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