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General E46 Forum
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Old 04-27-2009, 11:38 AM   #21
Zero2_2005
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Quote:
Originally Posted by edsel12 View Post
what spark plugs are you using?
same problem here with bosch +4 spark plugs...
replaced it with ngk iridium and my car runs better now and
no more cel....)
Bosch for now cause they are readily availible to me at the local Auto Store but will eventually order some after the gasket.
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Old 04-27-2009, 11:42 AM   #22
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definitely check the injectors
I have no way of checking the injectors cause I am limited on knowledge. It would be nice to know though. Oh, and I checked online for an injector OEM and it goes for bout $100. I want to fix the gasket first to see if thats the problem and save me an extra $50. If thats not the case then the injector. If that solves it then I willl not have a leaking gasket plus the new injector.
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Old 04-27-2009, 11:43 AM   #23
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Check your DISA Valve aka EGR Valve.
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Old 05-13-2009, 10:18 PM   #24
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I am still trying to rule out all the possibility of what could be causing the misfire. First I did the spark plug switch, I have Bosch platniums, then I did the coils and the boots. Now I have the valve cover gasket replaced. I have a peake code reader and its not reading anything related to the injector. The code I have are 15 F1: Misfire cylinder 4 and that was the only code read. The car does seem to use up gas quickly but not as much after I did the exhaust cam sensor replacement, but still. I will try to replace plugs to NGKs and do all 6 coils and boots replacement. But before that I will see if there is still oil in my 4th cylinder. Before I did the gasket there was more oil on the 4th plug compared to the others. Wet plug, I think thats what you call it. If there are no oil on the plug after a new gasket then I will look into doing what is listed above or try to see if the injector is at fault. I am just not sure if the injector is not putting in fuel or too much drowning the cylinder. I just hope that it will not be something serious cause I did find some engine oil in the 4th cylinder before the gasket change. I just need more feedback before I try to attempt anything.

Last edited by Zero2_2005; 05-14-2009 at 11:03 AM.
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Old 05-14-2009, 07:14 PM   #25
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I guess I will look into buying a used injector!! I will try that to see if that will solve the problem. If that doesn't work then I will take it to do a compression test. Now I know for sure it is not the coil or the plug. Doesn't matter if I try to switch them the missfire will still be in Cyl. 4.

Last edited by Zero2_2005; 05-21-2009 at 08:39 PM.
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Old 05-21-2009, 08:39 PM   #26
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Originally Posted by phrozen06 View Post
Check your DISA Valve aka EGR Valve.
I was looking through my repair bills and just realized that I had a new unit installed about 1 1/2 year ago. Its the DISA right?

Oh at the moment I am doing a vanos seal install along with the valve cover gasket.
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Old 05-21-2009, 08:43 PM   #27
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If you find out the cause please post as I am doing the same chasing a misfire in cylinder 5
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Old 06-07-2009, 12:07 AM   #28
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Get this, I just did my vanos seals and now my cylinders are all misfiring. Rough idling when engine is warm to temp and car chugs when accelerating. Did a code read and got a misfire in cyl 5 and 3. Swapped coil 5 to 1 and coil 3 to 2 and now cyl 1 and 2 are misfiring. For sure I must get new coils. As for cyl 4 I will still have to see if it is still misfiring after the new coils and spark plugs.
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Old 06-13-2009, 03:33 PM   #29
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I have the same exact ride with the same damn problem, Cyl 1&2 misfire and I changed the sparkplugs and coils already, whats the easiest way to check the injectors? anyone know a DIY for this?
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Old 06-24-2009, 10:49 AM   #30
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Hello again everyone. Just did a vanos seal, vanos gasket, valve cover gasket, brand new NGK plugs, and all brand new coil packs. Also did a new cam position sensor too before all that. Still misfires but no light. I really have no clue and I may be taking it to a shop. Just posting if there may still be any inputs. Car is now idling a whole lot better and now have a lot more power behind the wheels. You can really feel the acceleration. To add, I did do a tranny fluid change to so that really helped with the performance. 4th cyln. still misfires though.

Last edited by Zero2_2005; 06-24-2009 at 10:55 AM.
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Old 06-24-2009, 12:08 PM   #31
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sorry..i hope it does turn out to be the injectors, and not a cyclinder/valve job problem..
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Old 07-20-2009, 11:07 AM   #32
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I haven't taken it to the shop yet but I am hoping that it will not cost me a lot. Maybe it could be the fuel injector is stated earlier in the thread. But then again I don't feel too confident on taking apart the fuel rail and the injectors. I don't want to cause a fuel leak. It will be soon when I take it to the shop. The guy that I know there is very reputable and he knows how to work on BMWs. I will keep up to date on what the problem is and will post to see if any of you who has similar problems could diagnose your own.
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Old 07-20-2009, 11:33 AM   #33
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When My Nissan did this the shop also checked the compression due to driving like this can cause serious damage. Just something else to have them check while you are at it.
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Old 09-15-2009, 04:36 PM   #34
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UPDATE: My car was checked today and they said that the rod that holds the piston head in the 4rth cylinder is bent. It is still drivable but the amount of pressure will not be there when combustion takes place. They say that it was due to water getting in, don't ask me how, but it will cost roughly $2,000 in repairs. Now I'm stuck with a $116.32 bill and waiting til the end of this year to see if I want to fix it. I really love this car and would really like to keep it. What are you guy's opinions and is it possible to fix it my self?
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Old 12-31-2009, 11:15 AM   #35
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Misfire and rough idle

I am also having a problem with a rough idle when sitting still at stop.
I changed the coil to another cylinder but same cylinder showed on CEL.
It states misfire on cyl #2 and low fuel codes.

I am being told that it is probably the injector.

I tried the Seafoam/DeepCreap cleaning and it cleared for about 2 days.
Tried the cleaning again but it still idles rough at stop.

Any ideas? I have checked the usual suspects.

Anyone have detailed instruction on checking/replacing the injectors?
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Old 07-26-2010, 03:06 PM   #36
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Were you able to get this resolved? How did they determine it was the rod?
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