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BMW 3-Series (E90 E92) Forum
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335i misfire help
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11-27-2018, 11:43 AM | #1 |
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335i misfire help
So I recently purchased a 2008 BMW 335i with 75,000 miles. It is in great condition and only has a minor oil leak from the thermostat on the oil filter housing, which I am planning to fix in a few days. When I was driving the car already warmed up it drives perfectly fine and no stutters or weird sounds. Cold starts are perfect as well with no stutters or jumps either. The thing that I noticed that is weird is that on warm starts when the oil is already heated up the car will stutter but not violently and has noticeable misfires but doesn't throw a service engine light. On random warm starts of this exact nature it will throw a service engine light for cylinder 4 misfire. I had a old spark plug and coil pack laying around from my older e90 that had about 95,000 miles on them and swapped them in to the cylinder 4 that was giving me issues and it worked for about a week and a half but then still threw a code on me yesterday. I'm starting to think it is injectors but I ordered 6 new ngk spark plugs and 6 new Delphi coil packs to see it it will help before I resort to injectors. Any suggestions of anything else or more major that could be wrong?
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11-27-2018, 12:40 PM | #2 |
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Might as well do a full coil/plug replacement before you doing anything else. Besides that, has the engine ever been walnut blasted? I would consider doing that as well to clean the valves up, notorious carbon build-up spot. You can find it done for around $200-$300.
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11-27-2018, 12:53 PM | #3 | |
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11-27-2018, 01:00 PM | #4 | |
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Really wanted to do it but I think I won't do it until I get issues, or keep searching haha. |
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11-27-2018, 01:08 PM | #5 |
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That's only $488 is US bucks though! Regardless, everything seems more expensive up North. I saw some pictures of your grocery store prices for things like milk and beef and was astonished.
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11-27-2018, 01:17 PM | #6 | |
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But I did some research in Montreal, 2 hours from me and apparently some people are doing it for 350$ - 400$, let's hope it's still that. I should probably remove my manifold and take a look at them though after winter and see if they are actually super dirty or not before getting it done. |
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11-27-2018, 01:28 PM | #7 |
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yeah I have a catch can installed but I didn't clean the valves before putting it on it was more to prevent further coating of those poor valves lol
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11-27-2018, 07:40 PM | #8 | |
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https://www.e90post.com/forums/showthread.php?t=1459075 |
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11-27-2018, 08:05 PM | #9 |
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I had similar issue and it was an injector. Changed just the one injector and it’s been running fine since.
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2009 335i Coupe M-Sport MT 136,000 miles
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11-27-2018, 11:08 PM | #10 |
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What index injector did you buy to replace the faulty one? I’ve been trying to find out wether or not I can just replace one or if I have to do all 6. I’m pretty sure my injectors are under index 10 but I haven’t been able to look yet. Hopefully they are index 11 because in Carfax it does show some were replaced before I got the car around 20k miles. If they are index 1-10 I need to find somewhere to buy one. Lmk if u have suggestions or what you did.
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11-28-2018, 05:39 AM | #11 | |
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11-28-2018, 11:42 AM | #12 |
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11-28-2018, 11:44 AM | #13 | |
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11-28-2018, 01:31 PM | #14 | |
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03-02-2019, 06:46 PM | #15 |
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Hello I have a 2011 Bmw 335i e90 with the N55 engine. Every time I cold start the car it misfires on random/multiple cylinders. I've read the codes with a obdll but it doesn't tell me why it is misfiring. I let the engine warm up a little and the misfires completely stop. There's time where I've cleared the codes as well and the car runs like nothing is wrong. But again today i cold started it up and it began misfiring like crazy. Note there are a couple things in my head i believe may be the problem. I recently changed my spark plus some NGK's from autozone. Also when i unlock my car the tail lights and halos don't turn on anymore. So maybe it's the battery since i hear it can affect the fuel pump and lead to misfires but the weird part is i checked the battery with a battery tester and the volts are 12s off and 14s on but when the lights don't turn on when unlocked i heard is like a straight away sign the battery is going bad. I also have had times where i stop the get gas and when i get back in to turn it on the car is completely dead. The car only has 49k miles so i doubt it's the fuel injectors any ideas.? Please help.
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Tags |
bmw, coil pack, issue, misfire, n54, rough idle, shaking, spark plug, warm start |
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