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#1
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E91 rough idle at start
09 328ix. New plugs, coils. Cleaned both Vanos valves. When I first crank up in the am the RPMS/Idle jumps around a bit then settles into a nice smooth idle. I'ver checked for codes but all is clear.
I am thinking it might have a leaky injector but outside of that I have no idea.
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Vincent 2009 E350 4Matic 1987 325is 2024 Integra 6spd 2021 CX-9 1998 M Roadster - Sold 2021 Taco - Sold 2009 E91 Touring - Sold 2005 S$ Avant - Sold 2007 Carerra S - Sold 1976 911S - Sold Acura MDX - Dead 2000 e39 528i/5 - Sold |
#2
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Sometimes you have to reset it with a computer hook up, enter in ignition menu or similar. "Reset of stratification adaptation"
Your engine works with a stratified mix (not smooth), the mix is distributed by layer (Higher volume of gasoline near of spark plug) You need to reset the "throttle adaptation", You can do it by yourself without using a PC or Solus, there is a post about this issue: http://www.e90post.com/forums/showth...64#post9934064 Note: the adaptation learns about our driving style, when you reset the adaptation, you will notice a improvement. -_-_-_-_-_-_-_-_-_-_-_-_-_ Steps to do it manually: 1. Never touch the break pedal & key remains inserted the entire time 2. Insert key and push START Button 3. Press and HOLD gas pedal for 5 seconds 4. WITHOUT RELEASING THE GAS PEDAL, push the START Button 5. Release gas pedal 6. Wait full 2 minutes 7. Start car normally
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“When I was born I was so ugly the doctor slapped my mother.” – Rodney Dangerfield Bill C "aka" Catdaddy - The Catfather - Current: 1980 911sc 2019 Ford Raptor 1987 Mercedes 560sl ------------ Sold: 2011 BMW M3 2000 996 C2-IMS 2 Row, RMS Update 1986.5 928s 1987 944 16v 1973 911t 1969 911t "My first car"!! 1969 Westfalia Bus 1973 Volks Superbeetle |
#3
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Thank you! Ill try it tonight and report back.
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Vincent 2009 E350 4Matic 1987 325is 2024 Integra 6spd 2021 CX-9 1998 M Roadster - Sold 2021 Taco - Sold 2009 E91 Touring - Sold 2005 S$ Avant - Sold 2007 Carerra S - Sold 1976 911S - Sold Acura MDX - Dead 2000 e39 528i/5 - Sold |
#4
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That didnt seem to make a difference. I think ill pull and clean the injectors this weekend.
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Vincent 2009 E350 4Matic 1987 325is 2024 Integra 6spd 2021 CX-9 1998 M Roadster - Sold 2021 Taco - Sold 2009 E91 Touring - Sold 2005 S$ Avant - Sold 2007 Carerra S - Sold 1976 911S - Sold Acura MDX - Dead 2000 e39 528i/5 - Sold |
#5
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Might be worth checking/cleaning the IAC valve if it has one.
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Current 07 Mini Copper S 99 Dodge Viper ACR 65 Shelby 427 SC 07 Ducati 1098 17 Alfa Giulia Quadrifoglio Projects 86 "Backdate" 911 2.8 RSR 73 911 T Targa (Sold) |
#6
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The idle circuit is built into the throttle motor, no idle valve . I guess sticky injectors are are thing on these. I mean it runs fine otherwise. Just that little cough in the am. @Ducati we can get up early this Sunday and work on since im driving it down Sat night. Im thinking like 6am?
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Vincent 2009 E350 4Matic 1987 325is 2024 Integra 6spd 2021 CX-9 1998 M Roadster - Sold 2021 Taco - Sold 2009 E91 Touring - Sold 2005 S$ Avant - Sold 2007 Carerra S - Sold 1976 911S - Sold Acura MDX - Dead 2000 e39 528i/5 - Sold |
#7
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Good to know BMW has stopped overcomplicating thier designs, lol. Sure, ill leave the tools out for you so you can get an early start.
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Current 07 Mini Copper S 99 Dodge Viper ACR 65 Shelby 427 SC 07 Ducati 1098 17 Alfa Giulia Quadrifoglio Projects 86 "Backdate" 911 2.8 RSR 73 911 T Targa (Sold) |
#8
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Quote:
Question - is it only rough idle on cold start? If you shut the engine off so say 15 min and restart is it fine? I'm thinking some sort of cold start issue or possibly bad (or failing) O2 sensors.
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Chris M 1985 911 Carrera with a couple cosmetic only mods 2006 E90 330i 1999 E46 328i |
#9
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when i did my injectors on the e36 many of the injector caps basically fell off...may consider a set of caps and o rings available before you pull them...pull them out and put in individual plastic baggies and then see how they are working when you turn the car on...easy to identify if you have one or more leaking...
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Tito 82 911 SC with 3.2 73 RSR project 97 328is 99 328is 97 Lexus SC300 Manual 86 TL (gone) 993 (gone) 75 911S (gone) |
#10
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Its only happens in the am or after its cooled down for a few hours. My wife is the one who drives it and she has never even mentioned it. However, knowing its there is driving me nuts.
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Vincent 2009 E350 4Matic 1987 325is 2024 Integra 6spd 2021 CX-9 1998 M Roadster - Sold 2021 Taco - Sold 2009 E91 Touring - Sold 2005 S$ Avant - Sold 2007 Carerra S - Sold 1976 911S - Sold Acura MDX - Dead 2000 e39 528i/5 - Sold |
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