Lowering Cold Start Idle with STAR
Thread Starter
Newbie
Joined: Jun 2018
Posts: 9
Likes: 0
2005 E55 AMG
Lowering Cold Start Idle with STAR
Hey, I'm new here and stuff. What's up everybody 
I just received a Star setup that I bought used, and trying to figure out a few things. One of them is cold start idle... my 05 E55 has "high flow cats", so I don't need the high idle on a cold start anymore, as it's purpose is to warm up the cats faster.
I'm wondering if anyone knows if/where there is an adjustment for this within Star. I would love to lower it as I'm sure it would go through a lot less gas on startup, and less wear and tear on the cold M113K.
Thanks so much in advance for any help on this.
PS. I'm not sure if I'm supposed to just post for my first post, or if there is some kind of odd forum ritual I am to be following before posting... lol
I just received a Star setup that I bought used, and trying to figure out a few things. One of them is cold start idle... my 05 E55 has "high flow cats", so I don't need the high idle on a cold start anymore, as it's purpose is to warm up the cats faster.
I'm wondering if anyone knows if/where there is an adjustment for this within Star. I would love to lower it as I'm sure it would go through a lot less gas on startup, and less wear and tear on the cold M113K.
Thanks so much in advance for any help on this.
PS. I'm not sure if I'm supposed to just post for my first post, or if there is some kind of odd forum ritual I am to be following before posting... lol
Senior Member
Joined: Apr 2015
Posts: 354
Likes: 32
04 E55 AMG
Welcome to the forum!
Hi, and welcome. There really isn't an initiation here. I have a star system but have not attempted to change the idle in star. According to https://mbworld.org/forums/w211-amg/578546-intermittent-stumbling-idle-advice-e55.html
it is possible to change the idle in star. The system is fairly easy to navigate. I'd spend some time just going through it. You probably want to keep the car running while hooked up to star as it drains your battery pretty quick.
it is possible to change the idle in star. The system is fairly easy to navigate. I'd spend some time just going through it. You probably want to keep the car running while hooked up to star as it drains your battery pretty quick.
Thread Starter
Newbie
Joined: Jun 2018
Posts: 9
Likes: 0
2005 E55 AMG
Thanks for the response. This idle is fine where it is, so I don't want to modify where it normally idles at... it's just the cold start ~ 1300rpm I'd like to disable.
I appreciate the link. I've actually read through that one before trying to solve a random misfire, which still happens from time to time lol.
I really like that Star shows you the battery voltage at the top of the window! Very useful.
I appreciate the link. I've actually read through that one before trying to solve a random misfire, which still happens from time to time lol.
I really like that Star shows you the battery voltage at the top of the window! Very useful.
Thread Starter
Newbie
Joined: Jun 2018
Posts: 9
Likes: 0
2005 E55 AMG
Ya I didn't think of that somehow. Thanks for the idea.
I'd love to tune it myself if there was open source software, or even a tuning suite someone offered for sale. Such a basic car to tune... just like an old Honda. MAP, IAT, and narrowband O2's. Maybe one day...
Thanks for the input
I'd love to tune it myself if there was open source software, or even a tuning suite someone offered for sale. Such a basic car to tune... just like an old Honda. MAP, IAT, and narrowband O2's. Maybe one day...
Thanks for the input
Last edited by alltheboostpro; Jun 12, 2018 at 12:26 AM.
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Super Member
Joined: Jun 2017
Posts: 899
Likes: 140
2005 E55
I have spoken with RaceIQ about changing neutral and in gear idle with a tune and was told idle can only be adjusted with star. Sounds like you might have a hard time finding a way to change cold start specific idle.
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Thread Starter
Newbie
Joined: Jun 2018
Posts: 9
Likes: 0
2005 E55 AMG
Hey thanks for the thought!
I have adjusted the idle in Park/Drive (just for testing purposes), and it does work well. I love Star so much already, even without doing one of the main things I was hoping would be easily'ish adjusted/removed... lol. The $700 I paid has been worth it the first day I used it
I'm not convinced it's impossible, but definitely little is know about where the ecu makes it's cold start idle adjustment, and where to modify it with Star and/or a tune.
