Weird Idle

BMB063 · 04-28-2015, 09:51 PM

Hi All,

I've had my 335 since September last year and love it. Recently replaced the spark plugs because I noticed it wasn't idling as well after the tune. (JB4 and DP) After the new Bosh plugs, it still seems to idle in and out. The RPMs appear to be stable, but the engine itself sort of hums up and down. It This happens in Map 4 and also Map 5. Seems to happen in general with and without the AC on. Also if in Map 0, it does it much more.

I know these cars don't like the heat and being in southern Florida doesn't help. But this happens at all times, even at night when it's cooler. I just hit 20k miles. Any help would be great!

Also, I tried to attach the video through Photobucket but it doesn't seem to work. It's <30 seconds. Any tips on how to upload so you all can help me?

328i_E92_2007 · 04-29-2015, 01:35 AM

Upload to YouTube and post.

firemanjust1 · 04-29-2015, 01:52 AM

Try some techron fuel cleaner has helped smooth my idle in the past

BMB063 · 04-29-2015, 06:21 PM

Quote:

Originally Posted by firemanjust1

Try some techron fuel cleaner has helped smooth my idle in the past

I feel skeptical about that stuff, you'd say it will work even if I only have 20k?

http://www.amazon.com/Chevron-65740-.../dp/B00092893E < this good?

Here is the link. You have to listen closely.

BMB063 · 05-01-2015, 04:36 PM

Insight anyone?

BMB063 · 05-03-2015, 10:40 AM

Maybe I'm just hearing things?

Longdoggy · 05-03-2015, 07:43 PM

Sounds kinda normal.

snowbaron · 05-03-2015, 08:42 PM

Try Detergent gas, v power, and a software update fron the dealer

KeepRidingDirty · 05-03-2015, 09:02 PM

Weird idle culprits - > Spark Plugs, Coils, Dirty Valves (when was your last walnut blast?), Injectors. I'd eliminate those as possible causes first.

BMB063 · 05-04-2015, 05:00 PM

Thanks for all the suggestions guys!

- How much is a software update from the dealer and it's ok to go there and get it even with my JB4?

- What's the best route for detergent gas / cleaner?

- I doubt I have dirty valves or need a new coil given my low mileage, but I could be mistaken

Also as a side note, I noticed that when in map 5, it seems to idle better than in 4. Some slight RPM jumping in 4 or just seems more rough. And way better than in 0. I will keep it in 5 more often, but weird I get the idle issues with lower maps.

Sidewinderpb · 05-07-2015, 01:41 PM

Which firmware are you using on the JB4? Might want to update it if you haven't already. If you get the flex fuel wires, you can alter the fueling parameters to smooth out idle a bit.

BMB063 · 05-12-2015, 07:39 PM

Quote:

Originally Posted by Sidewinderpb

Which firmware are you using on the JB4? Might want to update it if you haven't already. If you get the flex fuel wires, you can alter the fueling parameters to smooth out idle a bit.

I'm not exactly sure since I bought it used off someone. How can I check or update it?

04-28-2015, 09:51 PM	#1
BMB063 Lieutenant 93 Rep 560 Posts Drives: E92 M3 Join Date: Sep 2014 Location: Columbus, OH iTrader: (2)	Weird Idle - Not Spark Plugs Hi All, I've had my 335 since September last year and love it. Recently replaced the spark plugs because I noticed it wasn't idling as well after the tune. (JB4 and DP) After the new Bosh plugs, it still seems to idle in and out. The RPMs appear to be stable, but the engine itself sort of hums up and down. It This happens in Map 4 and also Map 5. Seems to happen in general with and without the AC on. Also if in Map 0, it does it much more. I know these cars don't like the heat and being in southern Florida doesn't help. But this happens at all times, even at night when it's cooler. I just hit 20k miles. Any help would be great! Also, I tried to attach the video through Photobucket but it doesn't seem to work. It's <30 seconds. Any tips on how to upload so you all can help me? __________________ Competition Package \| OEM Exhaust Mod \| Test Pipes \| BPM Stage II Tune \|CF High Kick Spoiler \| CF Splitters \| Gloss Black Grilles YouTube \| INSTAGRAM \| My New Website: Shifted-Perspective.com \| DM for discounts on: LUX ANGEL EYES or BPM TUNES
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04-29-2015, 01:35 AM	#2
328i_E92_2007 Private First Class 15 Rep 152 Posts Drives: 2007 328i Coupe Join Date: Jun 2014 Location: Los Angeles iTrader: (0) Garage List 2007 BMW 328i [9.00]	Upload to YouTube and post.
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04-29-2015, 01:52 AM	#3
firemanjust1 Second Lieutenant 32 Rep 208 Posts Drives: Audi S3/03 350z Join Date: Dec 2013 Location: buffalo ny iTrader: (0)	Try some techron fuel cleaner has helped smooth my idle in the past
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05-01-2015, 04:36 PM	#5
BMB063 Lieutenant 93 Rep 560 Posts Drives: E92 M3 Join Date: Sep 2014 Location: Columbus, OH iTrader: (2)	Insight anyone? __________________ Competition Package \| OEM Exhaust Mod \| Test Pipes \| BPM Stage II Tune \|CF High Kick Spoiler \| CF Splitters \| Gloss Black Grilles YouTube \| INSTAGRAM \| My New Website: Shifted-Perspective.com \| DM for discounts on: LUX ANGEL EYES or BPM TUNES
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05-03-2015, 10:40 AM	#6
BMB063 Lieutenant 93 Rep 560 Posts Drives: E92 M3 Join Date: Sep 2014 Location: Columbus, OH iTrader: (2)	Maybe I'm just hearing things? __________________ Competition Package \| OEM Exhaust Mod \| Test Pipes \| BPM Stage II Tune \|CF High Kick Spoiler \| CF Splitters \| Gloss Black Grilles YouTube \| INSTAGRAM \| My New Website: Shifted-Perspective.com \| DM for discounts on: LUX ANGEL EYES or BPM TUNES
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05-03-2015, 07:43 PM	#7
Longdoggy Master Bates 80 Rep 495 Posts Drives: 2020 BMW M340 xDrive Join Date: Jun 2014 Location: New York iTrader: (0)	Sounds kinda normal. __________________ CURRENT: 2020 G20 M340 xDrive — Carbahn Tune RETIRED: 2011 E90 335i xDrive — Cobb AP3, PE Exhaust, Alpina TCU Flash, VRSF Charge Pipe 2017 Estoril Blue X1 M Sport — JB4
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05-03-2015, 08:42 PM	#8
snowbaron New Member 2 Rep 6 Posts Drives: 2011 328i xdrive N52 e90 Join Date: Apr 2015 Location: New England iTrader: (0)	Try Detergent gas, v power, and a software update fron the dealer
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05-03-2015, 09:02 PM	#9
KeepRidingDirty Professional Monkey Trainer 65 Rep 423 Posts Drives: 2007 BMW 335xi Join Date: Aug 2014 Location: Ottawa, On iTrader: (1)	Weird idle culprits - > Spark Plugs, Coils, Dirty Valves (when was your last walnut blast?), Injectors. I'd eliminate those as possible causes first. __________________ JB4 G5 ISO / ER Charge Pipe and Tial BOV / Wagner FMIC / CYBA Tips & Air Scoops / AFE DCI / BMW PE Exhaust Mod / M3 Rep Bumper / Dynavin E9x
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05-04-2015, 05:00 PM	#10
BMB063 Lieutenant 93 Rep 560 Posts Drives: E92 M3 Join Date: Sep 2014 Location: Columbus, OH iTrader: (2)	Thanks for all the suggestions guys! - How much is a software update from the dealer and it's ok to go there and get it even with my JB4? - What's the best route for detergent gas / cleaner? - I doubt I have dirty valves or need a new coil given my low mileage, but I could be mistaken Also as a side note, I noticed that when in map 5, it seems to idle better than in 4. Some slight RPM jumping in 4 or just seems more rough. And way better than in 0. I will keep it in 5 more often, but weird I get the idle issues with lower maps. __________________ Competition Package \| OEM Exhaust Mod \| Test Pipes \| BPM Stage II Tune \|CF High Kick Spoiler \| CF Splitters \| Gloss Black Grilles YouTube \| INSTAGRAM \| My New Website: Shifted-Perspective.com \| DM for discounts on: LUX ANGEL EYES or BPM TUNES
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05-07-2015, 01:41 PM	#11
Sidewinderpb Banned 329 Rep 1,739 Posts Drives: 2017 340i xDrive 6mt Join Date: Nov 2013 Location: CT iTrader: (7)	Which firmware are you using on the JB4? Might want to update it if you haven't already. If you get the flex fuel wires, you can alter the fueling parameters to smooth out idle a bit.
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