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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 04-05-2010, 03:32 AM   #21
mvrk10256
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Quote:
Originally Posted by 1st_ID_Vet View Post
I have the same issue going on right now...I just dumped $2100 on this clown to fix it and now it's back in the shop for the same thing....I was getting real rough idle and an occasional stall....Misfires on 1 and 5....thermostat error and coolant level too low codes from Autozone.. I replaced the Coils (from stock -> to Bav Auto High Performance Coils) and the Spark plugs (replaced all). The car is @ 110K now and had most if not all the same gear from day 1 (thanks to previous owner)...now instead of running rough the minute you turn the car on...it get's rough after driving it for 15 or 20 minutes (seems like when the engine has heated up)...let us see what tomorrow brings.....hopefully a fully functioning 325XI 2004..

Sadly I have not touched the O2 sensors or headers....any idea's?
well i am going to assume you have swapped your thermostat( basic maintenance) and your expansion tank( ditto) and made sure you are not leaking.

that should take care of low coolant. now i would have bought stock coils as they are cheaper. the only thing that could cause misfire is spark(replaced), coil(replaced), computer(distributor) not replaced. has the fuel filter been replaced? thats a long shot but a posibility. I would switch the precat o2 sensors anyway, you can always flip them back. the problem with shops is you enver know what the fvck they dito your car.

gooodluck.
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Old 04-27-2010, 09:42 AM   #22
Mcon330
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I didn't know the sensors had each their position. Im getting a constant misfire in my car, and i recently changed my 02 sensors. Is there a way to see physically if they are connected on the wrong side?
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Old 05-02-2010, 12:39 PM   #23
1st_ID_Vet
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Ok update. I took it in and the guy couldnt figure out what the issue was so I decided I would try to figure it out myself (all you old guys out there don't worry lol)
My BMW was at 110,000 at the time so I decided I would replace the spark plugs and coils as they would need to be done soon anyhow. I replaced them (coils I bought the Bav**** Hi Performance Coils [I starred out the name as I am not sure if it is a No-No to use company names in a forum like this; safe than sorry, right?]. Long story short...Problem is gone. My pickup is amazing, replaced 2 areas that needed it for the 100K maintenance; I am happy...except for the $2100.00 I dropped to learn nothing.
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Old 05-02-2010, 01:22 PM   #24
jdstrickland
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Originally Posted by Mcon330 View Post
I didn't know the sensors had each their position. Im getting a constant misfire in my car, and i recently changed my 02 sensors. Is there a way to see physically if they are connected on the wrong side?
The front and rear sesnors are the same. The parts guy will refer to them as Left and Right, but they are really front and rear -- for the exhaust manifold they go into.

What can happen is that they can be plugged in backwards, the wires reach to the wrong connector, and they are both the same. This is an instance where you have to make certain that you find the correct connector to plug into because both sensors can reach both connectors on the car.
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Old 05-03-2010, 02:38 PM   #25
1st_ID_Vet
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Originally Posted by mvrk10256 View Post
well i am going to assume you have swapped your thermostat( basic maintenance) and your expansion tank( ditto) and made sure you are not leaking.

that should take care of low coolant. now i would have bought stock coils as they are cheaper. the only thing that could cause misfire is spark(replaced), coil(replaced), computer(distributor) not replaced. has the fuel filter been replaced? thats a long shot but a posibility. I would switch the precat o2 sensors anyway, you can always flip them back. the problem with shops is you enver know what the fvck they dito your car.

gooodluck.
mvrk10256-
You are 100% right...you never know what they did to your car so they could fix one thing and screw up another that will not show signs of a problem until later down the road.
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