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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 02-11-2014, 10:03 PM   #1
csenf205
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Shakes when idle

I have 2003 325i. Just recently this car has started shaking when in idle and occasionally kills the engine. It also has a much harder time accelerating. Any idea on what's wrong with it and how to fix it?


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Old 02-11-2014, 10:37 PM   #2
Brevik
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I put the answer in your other thread
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Old 02-15-2014, 09:52 PM   #3
Boondockz
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Shot in the dark here maybe the MAF or fuel filter. Or maybe a big ass vacuum leak. Or maybe injector / spark plug / coils.
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Old 02-15-2014, 09:54 PM   #4
Boondockz
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Fuel pump maybe....shakes is little or no info. Try searching.
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Old 02-15-2014, 10:29 PM   #5
aproblem
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vanos or vacuum leak? i had rough idling until i fixed my vanos
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Old 02-16-2014, 03:00 PM   #6
tsalhani5
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A buddy of mine had a similar problem and it was simply due to his spark plugs. Other than that it could be motor mounts.


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Old 02-20-2014, 06:06 AM   #7
gregor1
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Engine sucking in air at idle - probably a hole in a breather hose - if you get misfire warning from OBD it can be caused by this problem.
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Old 02-21-2014, 01:48 AM   #8
1`
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I have this happen mild vibration, never causes issues like cutoff though. Happens while idle and not always. Engine feels a little rough during these times. I was wondering what the issue was. Sometimes the vibration is nonexistent, other times it's a bit rough. Only while idling (in drive while not moving).

Suggestions?

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Old 02-21-2014, 04:55 PM   #9
csenf205
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I put all new coils and plugs in it cleared most of the codes. I think I've narrowed it down to a fuel issue. Pump sounds like its slowing dying on me. I'm going to replace the fuel filter and pump since this is likely something id have to do down the road anyway.


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Old 02-21-2014, 05:13 PM   #10
Sedan Hussein
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Definitely give it a full tune up and go from there. Now that the plugs are done, replace the fuel filter then clean the MAF and ICV.
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Old 03-07-2014, 10:53 AM   #11
inebriation
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Check for tightness in your sparkplugs and also check for vacuum leaks. Might.even want to get under the car and check the condition of your engine mounts. When mine failed there was a noticeable shudder in the car at idle and all of that was cured by new mounts. Just guessing here and trying to help!
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Old 03-07-2014, 11:10 AM   #12
Xeus
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SES on? any codes?
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Old 03-08-2014, 10:17 PM   #13
headmaster
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I'm with sedan, check the icv, clean the maf. Also, how old is the disa valve? I've seen these "leak" before they fail, as the plastic gets more brittle and causes similar symptoms. Could also be a bad fuel filter..


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