BMW E46 Fanatics Forum banner

1 - 20 of 52 Posts

·
Registered
Joined
·
306 Posts
Discussion Starter #1 (Edited)
Just bought an 03 zhp sedan w/ 145k and I love the car except this one issue. I've had it about a week now and it drives flawlessly once it's warmed up, but every morning I experience the rough idle and a violent shaking. By the way it's about 80 degrees so it's not an ambient temperature issue. It also makes a knocking/clapping noise until you rev the engine then it goes away. THe first few days I had it, this worked and the noise would stop as soon as this was done. But I went to pull it in the garage this morning and no matter what I did the noise/violent shaking wouldn't go away. The SES light came on, and when I scanned it I got these codes.
P0171
P0174
P0300
P0305
P0303
P0302
P0304

I'm really worried it's some kind of an engine issue, but I really hope I'm wrong. I replaced all the plugs today and it did nothing. I called the previous owner and his response was "don't let it do that bro!". I'm taking it in tomorrow most likely, but any help would be greatly appreciated.
 

·
Registered
Joined
·
306 Posts
Discussion Starter #2
Anyone? Is it okay to drive like this? I think once it's warmed up it'll stop. My initial thought was the camshaft positioning sensor or something, but I'm afraid it may be the whole valvetrain. It just seems weird because once the engine is warm it runs like new.
 

·
Registered
Joined
·
474 Posts
If it was the CPS, it would happen all the time not just when the engine is cold. It sounds more like a leak in the intake. At your mileage, I'm sure the hoses are ready to be replaced. There is an active thread about fixing your cold idle/running issues for under $50.. Something to that effect. The OP of the thread has a great link in his sig that will help you diagnose your issue in detail.
 

·
Registered
Joined
·
306 Posts
Discussion Starter #5
I'll check that out. I'll probably be taking it to an Indy, so we'll see what they say. I talked to the guy I bought it from again and he said he took it to the BMW dealer in Orlando and they said "the lifters aren't getting enough oil and all 330's with this mileage do that". That's BS though, I've never ever heard of something like this and I've searched a ton. Most likely they wanted to rip him off and get an extra 4 grand. Hopefully it's something simple like this. My previous e46 always had the SES light on with the p0174 code and it turned out to be a small vacuum leak. That also had a rough idle when cold but not nearly this bad and didn't make any weird noises. Thanks for your opinion, i'll check it out. Anyone else have any thoughts?
 

·
Registered
Joined
·
3,355 Posts
CPS, vacuum leak, secondary air pump failure can cause shaking/weird sounds when cold, severely failed CCV?

What happens if you unscrew the oil cap while the car's running? Does it make honking or other weird noises?
 

·
Registered
Joined
·
306 Posts
Discussion Starter #8
Has anyone else experienced the knocking noise? Seems like a lot of e46's have a rough idle, but the noise is really concerning me. haha
 

·
Registered
Joined
·
213 Posts
I'm having the same problem, minus the noise you describe, with my '01 330i with 169k miles. It doesn't like to sit and idle when started cold. Once driven a few seconds, she purrs smoothly at idle. I'm needing to replace my VCG (a second time in the near 170k miles), so I'll tackle the CCV and its related hoses at the same time. I'll let you know the outcome.
 

·
Registered
Joined
·
57 Posts
I just recently had this problem fixed. Cold start ups occasionally would manifest this knocking noise as if the it was excessive flywheel chatter noise and really shaky.

Turned out to be an air idle controller and a faulty ignition coil so get those looked at.

You are describing the exact symptoms I had about a month ago. Have not had any since then.
 

·
Registered
Joined
·
306 Posts
Discussion Starter #11
just got it back from the shop. they charged me $455 to diagnose it and replace the ccv and all hoses. SES light is off and it runs much better, but i still get the knocking on cold start for a few seconds. no oil light, and it's not a lifter tick. doesn't sound like a rod knock either, really doesn't sound like an engine noise. the mechanic said to put some oil stabilizer in just to see if it changes anything but he doubts it's anything internal. any other thoughts? i'll keep you all posted
thnks
 

·
Premium Member
Joined
·
28,970 Posts
Can't say for sure I am correct on this, but search flywheel noise/loose flywheel and see what you can find.
 

·
Registered
Joined
·
306 Posts
Discussion Starter #13
Just got my fuel filter replaced because the ses light came on again, and now it's running even smoother. I haven't gotten the noise for about a week, but tonight I started it up for the first time in 2 days and it did it again. Here's a video of what it sounds like: http://www.youtube.com/watch?v=8a_L...DvjVQa1PpcFMIkRcaTAy1afGiadUV00oM3WTRfgVcd8s=

Not my video but it's the same noise. The funny thing is I've found about 3 or 4 videos of this noise and every one is on a ZHP, never a regular 330. What do you guys think?
 

·
Registered
Joined
·
26,274 Posts
Have you checked the condition of your oil? You've only had it a week and you were probably told something like "it's all good," but I wonder about the oil...

It doesn't sound like a pulley issue, but that intermittent tapping might be an issue with that...pulley(s) hanging up and/or a bad tensioner...look to see if belts are running flat between pulleys.

It's really hard to isolate sound on the internet, you know. Take a 5' section of garden hose and see if you can isolate the source of the sound.

If it's above the cylinders, consider running techron for a couple of tanks. At your mileage, you'd hope plugs have been done, but who knows.

I'd start hunting this sound down, but also, would start getting to work on taking care of maintenance items you know you'd need to do anyway.

That intermittency, though, makes me think lubrication for some reason and/or dirty valves...but that's only a sense...not a diagnosis.
 

·
Registered
Joined
·
681 Posts
When you get a new car its always good to run a tank or two of injector cleaner.

The fact that a fuel filter helped a lot probably perhaps means cleaning out the injectors would also help some?
 

·
Registered
Joined
·
58 Posts
Don't use any oil stabilizer. What about any good synthetic oil needs stabilized? My guess is your DISA. That's what my rattling was upon startup.
 

·
Registered
Joined
·
306 Posts
Discussion Starter #17
I did end up running some oil stabilizer but it didn't do anything. I'll probably change my oil again because I don't want that stuff in there if it's not doing any good. Oil was changed 3,000 miles ago. I changed the plugs the day after I bought it, and the mechanic ran some injector cleaner in it. The car runs perfectly aside from this, and even when it makes the noise now the idle remains smooth. Giving it just a little gas makes the noise temporarily go away, but if the car is not under a load it sometimes comes back. It generally does it about 30 seconds after cold starts. If I take off right after I start it I never encounter the noise. It doesn't seem to be a big deal, but I'm still a little concerned. Any other thoughts? I'll try the garden hose thing to try and see where the noise is coming from. I'm not sure about the disa valve, but now that you mention it right at 2200 rpms I get a slight rattle if the windows are down, which sounds like it could be the disa. It's so quiet I didn't even think about it till you mentioned it, but I'll look into that as well. Besides fuel filter, ccv, plugs, disa, and vanos, what else should be done at this mileage?
 

·
Registered
Joined
·
2,270 Posts
At this point it seems like guess-work, but I'll throw in some suggestions:

Gumout All-IN-One
Treat yourself to 93 octane gas
replace fuel pump
ignition coils
 

·
Registered
Joined
·
45 Posts
I just had rough idle issues checked hoses and the airboot ripped repaired boot till i get new one the cleaned maf sensor idle issues went away then driving to stop had a hard clunking feel when rpms got down pass 800rpms got on this site and found out that another 330 owner had same problem with his 330 and it was the idle control valve ,checked mine and sure enuff my was broken going tomorow to get it and repair myself check yours just to be safe. when they brake they can cause all kinds of misfire codes and vacuem leak codes your car is high mileage so it could be your issue like mine.the dealers/mechanics will only lie and rip you off ! check this site for someone with same issues you might get lucky and find the fix yourself like I did!
 
1 - 20 of 52 Posts
Top