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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 01-16-2013, 11:50 AM
libradofavela libradofavela is offline
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Exclamation Misfire? only in park and neutral? extras!

i have a 1999 bmw 328i e46 with 118k. It only misfires on park or neutral but in drive and everything else is works smooth oh and no engine light is on. Another thing is i recently started school about 20 miles from where i live and on the way there my car is smooth but for some reason on the way from school (in the afternoon) halfway home my engine light turns on and my car doesn't shift it seem to stay in 4th gear. When i stop at a light or stop sign my takes a while to take off. After i get home i turn my car off and about 30 minutes later my engine light turns off and the car is fine but then again still misfires in park or neutral with no engine light?? i need help im new to bmw's.
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  #2  
Old 01-16-2013, 12:15 PM
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The first step in any diagnosis is to go someplace like Autozone, have them scan the codes, then report their findings here.
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  #3  
Old 01-16-2013, 12:55 PM
joegr joegr is offline
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Quote:
Originally Posted by libradofavela View Post
i have a 1999 bmw 328i e46 with 118k. It only misfires on park or neutral but in drive and everything else is works smooth oh and no engine light is on. ...
Do you mean that it seems to misfire when you step on the gas in neutral/park and get close to 3K RPM? That's not a misfire. That's the neutral limiter and it's supposed to do that. It's there to reduce the damage that people do by flooring that gas pedal and slamming the transmission into gear.
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  #4  
Old 01-16-2013, 06:19 PM
libradofavela libradofavela is offline
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Originally Posted by joegr View Post
Do you mean that it seems to misfire when you step on the gas in neutral/park and get close to 3K RPM? That's not a misfire. That's the neutral limiter and it's supposed to do that. It's there to reduce the damage that people do by flooring that gas pedal and slamming the transmission into gear.
No when it's in park or neutral I'm not stepping on the gas its at idle after the car is warmed up
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  #5  
Old 01-24-2013, 10:25 PM
libradofavela libradofavela is offline
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okay i got the codes?!?!?!?!
P0735 (incorrect ratio)
P0303 (misfire cylinder 3)
P0300 (misfire randon cylinders)
P0301 (misfire cylinder 1)
P0173 (fuel trim two condition)
P0170 (fuel trim bank one)
P0302 (misfire cylinder 2)
also (P1250)-(P1188)-(P1189) which they said they dont know what these codes mean!

and i discovered and oil leak have no idea where its coming from, on day it will leak a little. the next day it will leak a puddle. im stuck

Last edited by libradofavela; 01-24-2013 at 10:33 PM.
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  #6  
Old 01-24-2013, 11:27 PM
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Quote:
Originally Posted by libradofavela View Post
okay i got the codes?!?!?!?!
P0735 (incorrect ratio)
P0303 (misfire cylinder 3)
P0300 (misfire randon cylinders)
P0301 (misfire cylinder 1)
P0173 (fuel trim two condition)
P0170 (fuel trim bank one)
P0302 (misfire cylinder 2)
also (P1250)-(P1188)-(P1189) which they said they dont know what these codes mean!

and i discovered and oil leak have no idea where its coming from, on day it will leak a little. the next day it will leak a puddle. im stuck
It could be one or more of the following (depending on whether or not any of the following have been replaced):

Cam Position Sensors

VANOS seals

CVV

Valve Cover Gasket

New plugs
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  #7  
Old 01-25-2013, 07:11 AM
joegr joegr is offline
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P1188 = Fuel Control (Bank 1 Sensor 1)
P1189 = Fuel Control (Bank 2 Sensor 1)
P1250 = Very low fuel level
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  #8  
Old 01-25-2013, 11:55 AM
libradofavela libradofavela is offline
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i put new plugs in but when i took the old ones out, the bottom of the thread have oil on it and the old spark plugs had oil. Is that normal? i change the spark plugs and im going to change to valve cover gasket in the morning. Any other suggestions?
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  #9  
Old 01-25-2013, 11:59 AM
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Quote:
Originally Posted by libradofavela View Post
i put new plugs in but when i took the old ones out, the bottom of the thread have oil on it and the old spark plugs had oil. Is that normal? i change the spark plugs and im going to change to valve cover gasket in the morning. Any other suggestions?
The oily plugs is usually an indicator that your CVV is failing. If you replaced it, along with the VANOS seals and VCG, you would see a huge improvement in performance.
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  #10  
Old 01-25-2013, 12:06 PM
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If you do the CVV, do yourself a favor and replace the oil filter housing gasket at the same time. Removing the oil filter housing makes it much easier to get to the CVV and for $10 or less, its good preventative maintenance.
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  #11  
Old 01-25-2013, 12:31 PM
libradofavela libradofavela is offline
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will replacing the cvv stop the oil leak as well?
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  #12  
Old 01-25-2013, 01:24 PM
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Quote:
Originally Posted by libradofavela View Post
will replacing the cvv stop the oil leak as well?
All the things mentioned above are inter-related, and have an effect on each other. Kinda like building a house, first thing you need is a good solid foundation....performing the above-named repairs will *give* you that foundation....
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  #13  
Old 01-27-2013, 12:28 PM
libradofavela libradofavela is offline
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so i discovered the oil leak and found that the trans is leaking. Its dripping from the driver side top of the trans?? any ideas??
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  #14  
Old 01-27-2013, 01:57 PM
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Are you positive it's trans fluid? Trans leaks are rarely on the top.
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Last edited by catso; 01-27-2013 at 01:59 PM.
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  #15  
Old 01-27-2013, 02:18 PM
libradofavela libradofavela is offline
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im pretty sure, its like dripping along the side of the trans of the driver side
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  #16  
Old 01-27-2013, 02:37 PM
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What color is the fluid?
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  #17  
Old 01-27-2013, 02:39 PM
libradofavela libradofavela is offline
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its a brownish and had a horrible odor but it only leaks sometimes
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  #18  
Old 01-27-2013, 02:51 PM
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Maybe the filler plug is loose or missing? Or your torque converter seal is bad? You need to inspect it from below and confirm where the fuid is coming from, Sounds like you have a whole mess of problems, good luck.
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