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02-23-2016, 04:04 PM | #67 |
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Thanks for the heads up. I have a schduled service appointment coming up and I'll mention this.
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02-23-2016, 04:52 PM | #68 | |
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You mentioned that you showed this thread to your SA and eventually had the issue resolved? I thought that they were unable to recreate the issue? Did they come through after all? I called my dealer and mentioned the issue and that it is new as of their battery installation. It didn't seem like I was going to get far going down that route without shelling out some money for diagnostic fees. Appreciate the help! |
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04-03-2016, 10:39 AM | #70 |
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Mine does it as well. Threw codes for o2 sensors so replaced those. Still does it. Rarely pops into neutral anymore at a light. I just don't even think about it anymore. I just chalk it up to a shitty designed car. Take the good with the bad.
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04-04-2016, 10:44 PM | #71 |
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I'm finally going to bring in my car to an Indy shop to adress this problem and I'll update what's going on when I get there this Thursday or Friday since I hate having the rpms go up and Down at a stop....
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05-26-2016, 11:56 AM | #72 |
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My 09 DCT does this. Step on brakes, idle drops to ~550. Release brakes, idle goes back to ~750.
Has anyone resolved this issue? I believe it to be vacuum related. |
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05-26-2016, 01:24 PM | #73 |
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This is normal behavior for the car w/AC off-- idle moves up 200 RPM when releasing the brake. Your '09 DCT is operating as designed. Among other things, the extra RPM assists the car in creep mode when idling along in stop and go traffic.
Last edited by Beemdog; 05-27-2016 at 01:08 PM.. |
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05-26-2016, 03:23 PM | #74 |
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My DCT car does not do this. Rock steady at 750 with AC on and closer to 500 with AC off..
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05-26-2016, 05:15 PM | #75 | |
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Covers everything from e52 up to f10 including the e92 and confirmation charge for brake energy regeneration is only calculated on start up So see page 24 for idle speed increase if current draw cannot be supported by the battery Last edited by crypticc; 05-26-2016 at 05:24 PM.. |
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05-26-2016, 07:57 PM | #76 | |
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05-26-2016, 09:03 PM | #77 |
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mine did this for a little while after my alternator died and i therefore had to disconnect the battery. after i did the repair, when i'd pull up to a light, and depending on what i did with the brake, it'd go to a super low idle and then sometimes back to normal idle. it was so bad that the car even died once at a stoplight. it seems to have relearned whatever it is that it needs to know and now its idle is back to normal. took maybe a couple weeks of DDing for it to be back to normal.
i've read that this behavior is often correlated with disconnecting/reconnecting the battery; best explanation i found when mine was acting up and its resolution suggests it's the case. |
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05-28-2016, 01:29 AM | #78 | |
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Separately the creep mode in the dct is activated by a period on the accelerator only. Before then it's only hill hold . Regards |
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05-31-2016, 07:53 AM | #79 |
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06-03-2016, 10:22 AM | #80 | |
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I get that idle can change based on load, charging, etc., but that doesn't address what several folks were seeing IMHO. Really, my point is that the situation I described in my original post appears to be part of a normal operation and not something to sweat about.
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06-03-2016, 10:55 AM | #81 | |
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06-03-2016, 11:34 AM | #82 |
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My 335i had a rough idle when i first got it, fixed it when i did a walnut blast, changed plugs and replaced 2 injectors (because they where the oldest ones and all the rest where pretty new). I put thought into just how much carbon these engines have, main reason i actually want to go over to full e85. My buddy has a 335i running 100% e85 and puts out about 800hp+, had the car from 36k miles till 120k now and has never had an issue. Kinda tells me that the cars run much cleaner and better on it, but thats off topic
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06-03-2016, 12:09 PM | #83 | |
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06-07-2016, 06:33 PM | #84 |
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True Story, Compression issue might come into play in the future to come, but otherwise I vouch those numbers ^^ look up "the kracken" on youtube
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08-30-2016, 11:47 AM | #86 |
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had a similar issue on my e46 for a few years. finally the car broke down and found that i had a bad coil. replaced the coil and issue went away. you may have a coil going bad
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08-31-2016, 01:41 AM | #88 |
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