06 325i n52 rough idle help?

T_revor808 · 07-16-2016, 12:18 AM

As title states my n52 has a slight rough idle at park and neutral but if I give it the slightest gas it's completely gone runs and drives great any help would be appreciated.

(Idles at 600rpm rough but if I give it a tiny bit of gas and have it sitting at 700rpm idles very smooth and perfect)

Phil325i · 07-16-2016, 06:58 AM

As a first step, find someone with a fault code reader to see if your engine is throwing any codes.

T_revor808 · 07-16-2016, 12:24 PM

Quote:

Originally Posted by Phil325i

As a first step, find someone with a fault code reader to see if your engine is throwing any codes.

I have a BMW code reader the codes I get pulled up are (dmtl fault) and (intelligent battery sensor). I didn't think other of those work cause this problem would they?

TheBingoBalls · 07-17-2016, 03:15 PM

Quote:

Originally Posted by T_revor808

I have a BMW code reader the codes I get pulled up are (dmtl fault) and (intelligent battery sensor). I didn't think other of those work cause this problem would they?

Nope. Those two issues are unrelated and fixing them isn't going to the rough idle that seems to plague higher mileage N52's. I have the same issue and could never solve it after replacing various parts. I've just accepted it because other than that, the car still runs fine so it's not detrimental to the car and/or it's performance.

T_revor808 · 07-17-2016, 03:51 PM

Quote:

Originally Posted by TheBingoBalls

Quote:

Originally Posted by T_revor808

I have a BMW code reader the codes I get pulled up are (dmtl fault) and (intelligent battery sensor). I didn't think other of those work cause this problem would they?

Nope. Those two issues are unrelated and fixing them isn't going to the rough idle that seems to plague higher mileage N52's. I have the same issue and could never solve it after replacing various parts. I've just accepted it because other than that, the car still runs fine so it's not detrimental to the car and/or it's performance.

Ok thank you yeah it doesn't bother mean and my car runs perfect. I'm just selling it now at the moment just bought a 335i. And am thinking the idle may scare some people off ?

Three_thirty_I · 07-17-2016, 11:01 PM

Since you're selling it, try and see if cleaning the MAF and Vanos solenoids might help. Could be something as simple as a dirty MAF or sticky solenoids.

T_revor808 · 07-17-2016, 11:25 PM

Quote:

Originally Posted by Three_thirty_I

Since you're selling it, try and see if cleaning the MAF and Vanos solenoids might help. Could be something as simple as a dirty MAF or sticky solenoids.

I'll try the solenoids cleaned maf already

ZeroSum · 07-18-2016, 09:02 AM

How many miles?

T_revor808 · 07-18-2016, 12:03 PM

Quote:

Originally Posted by ZeroSum

How many miles?

Surprisingly not much a little over 30k on the engine the body and rest of the car has 132,000. The motor blew so we swapped a newer engine in.

ZeroSum · 07-18-2016, 02:54 PM

Quote:

Originally Posted by T_revor808

Surprisingly not much a little over 30k on the engine the body and rest of the car has 132,000. The motor blew so we swapped a newer engine in.

no codes?

T_revor808 · 07-18-2016, 02:58 PM

Quote:

Originally Posted by ZeroSum

Quote:

Originally Posted by T_revor808

Surprisingly not much a little over 30k on the engine the body and rest of the car has 132,000. The motor blew so we swapped a newer engine in.

no codes?

Just dmtl fault. And intelligent battery sensor. I'm almost thinking only way to fix the issue would be to have the idle adjusted or the software updates from what I've read.

07-16-2016, 12:18 AM	#1
T_revor808 Private 11 Rep 71 Posts Drives: 2007 n54 335i and 2006 n52 325 Join Date: Jul 2016 Location: Maui HI iTrader: (0) Garage List 2006 BMW 325i [0.00] 2007 BMW 335i [0.00]	06 325i n52 rough idle help? As title states my n52 has a slight rough idle at park and neutral but if I give it the slightest gas it's completely gone runs and drives great any help would be appreciated. (Idles at 600rpm rough but if I give it a tiny bit of gas and have it sitting at 700rpm idles very smooth and perfect) Attached Images
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07-16-2016, 06:58 AM	#2
Phil325i Brigadier General 645 Rep 3,228 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	As a first step, find someone with a fault code reader to see if your engine is throwing any codes. __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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07-17-2016, 11:01 PM	#6
Three_thirty_I Lieutenant Colonel 381 Rep 1,928 Posts Drives: 2010 BMW E90 330i M Sport Join Date: Aug 2010 Location: Cape Town, South Africa iTrader: (0) Garage List 2010 BMW E90 330i M ... [9.63]	Since you're selling it, try and see if cleaning the MAF and Vanos solenoids might help. Could be something as simple as a dirty MAF or sticky solenoids. __________________ 2010 BMW E90 330i M Sport (M) Ex: BMW E90 330i (M) '05 (His) \| (Hers) BMW E46 320i f/l (M) '03
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07-18-2016, 09:02 AM	#8
ZeroSum First Lieutenant 35 Rep 331 Posts Drives: E90 328i/MR2 Join Date: May 2015 Location: Tennessee iTrader: (0)	How many miles? __________________ 2008 Monaco Blue 328i Sedan / Charcoal Delete / K&N Drop In Filter / RM Intake Boot / AA Tune 1993 MR2
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