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BMW 3-Series (E90 E92) Forum
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vacuum line fix - low boost, underboost, 30ff, wastegate rattle
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04-30-2014, 08:13 AM | #133 |
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That's a long running thread (~3 years, 132 posts so far), not sure if I should read the entire discussion. Could we summarize all additional info collected over the 132 posts, if any, and add them to the first post?
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04-30-2014, 09:04 AM | #134 | |
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Quote:
http://www.verociousmotorsports.com/...-the-Foot.html |
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04-30-2014, 10:19 AM | #135 |
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I've got a 30FF code and lots of wastegate chatter on my 07. I'll be changing my lines out this week. I'm glad to hear that its a simple job.
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05-03-2014, 10:17 PM | #136 |
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Just had a general question. I got the P30FF code and changed the two vacuum lines behind the oil filter housing they were extremely brittle. I no longer get the codes but now that I'm paying attention I noticed my car only holds vacuum for about 2 hours. Is this normal do I possibly have another leak? I would think the system would hold vacuum for a day or two.
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05-10-2014, 12:53 AM | #138 |
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http://www.e90post.com/forums/showpo...9&postcount=14
Do i just buy the silicone tubing and replace everything highlighted in the link? Even the ones behind the oil filter? |
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07-02-2014, 08:29 PM | #139 |
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Sorry to bump this old thread. I did what the op did and I blew into the vacuum lines. I immediately heard air exiting as soon as I blew in. So it's safe to assume I have a vacuum leak as IM getting 0 boost and 30ff?
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07-31-2014, 07:54 PM | #140 | |
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"3100 low boost mode engaged -- CEL displayed" code errors via JB4 Not sure why, or what else could be the problem? any assistance from anyone else before I send my car away to a work shop? - CP - CAI - JB4 (map 2) |
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09-23-2014, 10:28 PM | #141 |
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I was out driving my car tonight and it was holding boost fine then all of a sudden I get half engine and "3100 low boost mode engaged -- CEL displayed" my car is making no boost at all and idk why so randomly. I got towed Friday and im thinking my car was so low that it knocked the ic loose? any other ideas im about to go check those lines in the OP
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10-18-2014, 08:58 PM | #142 |
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This post is awesome. I found out what WG rattle sounded like after one of these hoses totally rotted and ripped. It is horrid. And the lack of power was extremely noticeable. Glad to be back.
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10-26-2014, 05:54 PM | #143 |
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I did the same. You need about 16 inches (8 inches each). And they sell 5/32 hose by the foot for about 65 cents a food. Super cheap. Great little mod. Eliminated a potential boost leak, but now it's the sensor that's gone bad.
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11-13-2014, 06:24 PM | #144 |
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I bought the hoses I need and size . 15ft total.I'm having no issues boosting but do have issue with wga rattle.the line that goes to the brake booster,does that get replaced as well and what about the rubber gourmet on the brake booster?
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11-13-2014, 10:25 PM | #145 |
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Do all silicone lines period. Vacuum test all hard piping. I suggest using a mityvac with a gauge. You should be able to build vacuum and have little to no loss. Cap your lines at the end and pump your hand mityvac at the other end to 26-30"Hg and see that it holds. You can test the whole system this way and be sure.
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12-05-2014, 11:48 AM | #146 |
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2007 @ 68k miles and my rubber lines were extremely hard. I was boosting 6 PSI regardless of map 1, 5 or 7 (JB4 G5). After going to Pep Boys, I purchased a pack for $5 and replaced those two lines. Wow, Map 7 hitting 18 PSI! Thanks OP!
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12-05-2014, 03:45 PM | #147 |
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Yep...those two lines go to the vacuum canisters on the front left side of the engine bay. If one of those are leaking or disconnected, it will cause major issues!
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01-01-2015, 06:20 PM | #148 |
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I want to thank you for this thread!!! i wasn't too suprised when I checked my Vac lines right at that spot and they were not only old and cracked but one had come completely off. So I replaced them both and WOW!!! I can't believe how much difference a vacuum line can make. I thought it would maybe be a bit of a difference but it was like BAM!! YEEEEEE HAAAAA!!!!!!! Thanks and this should be a sticcky if it isn't already.
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01-02-2015, 03:18 AM | #149 |
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why this vaccum are not considered if we change all by silicon
like here ? http://www.e90post.com/forums/showth...=894084&page=2
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Last edited by kiteboy; 01-02-2015 at 03:27 AM.. |
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03-29-2015, 09:55 AM | #150 | |
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Quote:
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04-16-2015, 09:39 PM | #151 | |
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Went for a long drive afterwards and was like "oh yeah, that's what my car used to pull like" Ordering some red Verocious silicone vacuum hose now so I can replace the crap I bought from the local auto store! |
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05-13-2015, 07:15 PM | #153 |
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Having the same problem and the dealer is asking $5k to replace the turbos. I will try doing this over the weekend. I hope this will fix my issue. Thanks for the info!
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05-16-2015, 08:56 AM | #154 |
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Just did this today and found a broken hose near the filter. After changing it, I drove the car hard. Error was gone and my car was driving better. This saved me a lot of money. Bmw of morristown told me it was a faulty waste gate and was asking 5k to replace my turbos. Good thing I tried this first before letting them do the job. I guess they never checked the hose at all. Thank you very much!
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