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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > BOOTMOD3 stage 2 n20 drivetrain malfunction
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      08-10-2020, 11:52 AM   #1
b58f3o
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Drives: BMW 340i 6spd
Join Date: Aug 2020
Location: Las Vegas

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If any of you have are having "drivetrain malfunction" thrown without check engine light... I was able to fix with the recommended spark plugs from BM3. I was running the OEM plugs which are gapped a lot wider than BM3 recommends.

***Issues I was having were***
•rough or fluctuating idle at cold start, when WOT at low rpm (like going up a hill) it would sound like I'm 2 stepping the car (lol), and at WOT under heavy load the car would throw (drivetrain malfunction) and automatically go into limp.

I purchased the recommended NGK 97506 and gapped them to .023. Issue solved!

Tune• Stage 2 93 (AGG) n20 pwg
Mods• AFE intake, catless dp, straight pipe, trans flash
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