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Old 08-18-2012, 12:42 PM   #1
2003silver330i
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No warning lights with codes

I just got my Peake code reader a few days ago and got the following codes when I scanned the car. So I cleared the codes:

03...Ignition Coil Cyl #6
01...Ignition Coil Cyl #2
02...Ignition Coil Cyl #4
d2...Misfire During warm-up Cyl #6
1D...Ignition Coil Cyl #1
1F...Ignition Coil Cyl #5
1E...Ignition Coil Cyl #3

Today I decided to scan the car again and got the exact same codes. The car does have a rough idle but have been living with the issue since I purchased the car in February. It has 139K mile on the it. Any clue on what is causing all these codes?

Before anyone asks I have done the following:
1. replaced fuel pump
2. brand new DISA
3. cleaned ICV
4. cleaned MAF
5. cleaned throttle body
6. inspected air intake boot
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Old 08-18-2012, 01:07 PM   #2
jfoj
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I doubt you have 6 bad ignition coils, but you may have a problem related to them??

I would probably pull all the coils and spark plugs.

I would check the ground wires to the coils.

Replace the spark plugs.

Replace the spark plug boots.

Inspect the coils for arc damage and perform a resistance test on them.

Clear codes and see what happens.
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Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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Old 08-18-2012, 01:21 PM   #3
2003silver330i
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jfoj...I found this post. I hope this is exactly the issue I'm having.

http://forum.e46fanatics.com/showthr...isfires&page=2
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Old 08-18-2012, 02:24 PM   #4
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I'd like to focus for a moment on the thing you said about having codes but no light. This should not be possible UNLESS the codes you have are Pending Codes -- events that the car has detected once, but have not repeated.

There is another possibility, the Check Engine (SERVICE ENGINE SOON) light does not even work. Turn the key to RUN (Position II), the check engine light MUST be on. If it is not on, this will cause the car to fail smog. Well, it will cause the car to fail smog in California, your mileage may vary.
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Old 08-18-2012, 03:46 PM   #5
2003silver330i
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I check all of the fuel injector connectors and they are all tight with no broken connectors. However I did find oil in at least one spark plug cylinder and oil pooled on the valve cover. Pics coming.
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Old 08-18-2012, 03:47 PM   #6
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Quote:
Originally Posted by jdstrickland View Post
I'd like to focus for a moment on the thing you said about having codes but no light. This should not be possible UNLESS the codes you have are Pending Codes -- events that the car has detected once, but have not repeated.

There is another possibility, the Check Engine (SERVICE ENGINE SOON) light does not even work. Turn the key to RUN (Position II), the check engine light MUST be on. If it is not on, this will cause the car to fail smog. Well, it will cause the car to fail smog in California, your mileage may vary.
Yes the SES light stays on when the key is in position two.
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Old 08-18-2012, 04:57 PM   #7
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click photos to see larger image

Notice some of the Bosch ignition coils have melted rubber


See oil down near spark plug in cylinder #4......Cylinders #2 and #3 has traces of oil in the same location (not pictured)


Another photo of cylinder #4


Notice the oil pooled on the valve cover


Again notice the oil pooled all over the valve cover.


Notice the missing chunks of plastic. Half the cylinders look like this.


Another photo of missing plastic chunks.
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Old 08-18-2012, 05:02 PM   #8
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What all should be replaced?
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Old 08-18-2012, 06:24 PM   #9
2003silver330i
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At the minimum I'm going to order:
New Bosch spark plugs
All new Bosch ignition coils
A new valve cover
Does this VC include all of the bolt grommets too? http://www.ecstuning.com/BMW-E46-330...Cover/ES18478/

Am I missing anything?

Last edited by 2003silver330i; 08-18-2012 at 06:27 PM.
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Old 08-18-2012, 06:41 PM   #10
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Quote:
Originally Posted by 2003silver330i View Post
Yes the SES light stays on when the key is in position two.
Okay, the light works. The light is not on when you pull codes, this means the codes are Pending Codes, they happened once and the car is waiting for them to happen again. This is why they come up without the light being on.

You have random, multiple misfires. There are several things that can cause this. You need a better diagnostic utility, or you have to wait for more codes.
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Old 08-18-2012, 06:51 PM   #11
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jd...did you even look at the photos in post#7? Isn't my issue oil in the spark plug cylinders?? There is some major oil leaks coming from the 4 center bolts that hold the valve cover down and some of those rubber grommets are missing chunks.

Last edited by 2003silver330i; 08-18-2012 at 06:55 PM.
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Old 08-18-2012, 06:54 PM   #12
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Quote:
Originally Posted by 2003silver330i View Post
At the minimum I'm going to order:
New Bosch spark plugs
All new Bosch ignition coils
A new valve cover
Does this VC include all of the bolt grommets too? http://www.ecstuning.com/BMW-E46-330...Cover/ES18478/

Am I missing anything?
I THINK you are throwing crap on the wall, waiting for something to stick. You can diagnose a problem with a fat checkbook (lots of random parts), or you can use a diagnostic package that actually looks at the engine management system to see what is wrong.

ONE THING THAT CAN BE WRONG is a bad MAF. My MAF was bad and I had random multiple misfires -- I also had FUEL TRIM and FUEL CONTROL (P0170, P0173, P01188, and P01189) problems. The MAF reports to the computer that the air is warm and thin, but it really is moderately warm and normal density, the result is that the fuel trim/control makes a lean mixture, then a few seconds go by and the MAF reports the air is thick and cold but the air is still moderate and normal, but the fuel deliver results in a rich mixture. These conditions should give P0170, P0173, P1188 & P1189. But the lean side of the issue will give the misfire conditions.

You have to understand what a misfire is.

MISFIRE means that the expected work was not performed. When a plug fires, the crank has to progress from its current position to the next position within a certain period of time, if it takes too long then a misfire is reported. Misfire can be weak spark, or low fuel load. A low fuel load can result from the MAF lying through its teeth, or a vacuum leak. Of course, you can have cloged fuel injectors or a weak fuel pump.

Whatever your problem, throwing a shopping cart full of parts at the car is not the most economical approach to the repairs you need.
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Old 08-18-2012, 06:56 PM   #13
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Order coil boots as they do not usually come with the coils. You will also need the 16? Valve cover grommets as well. The valve cover parts should be around $60 as I recall, if far cheaper, you are missing things.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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Old 08-18-2012, 06:58 PM   #14
2003silver330i
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jd...you maybe right but that oil leak has to be fixed.
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Old 08-18-2012, 07:48 PM   #15
2003silver330i
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Quote:
Originally Posted by jfoj View Post
Order coil boots as they do not usually come with the coils. You will also need the 16? Valve cover grommets as well. The valve cover parts should be around $60 as I recall, if far cheaper, you are missing things.
Thanks. For peace of mind I'm going to replace all of the original BMW ignition coils with 140K on them. I just pulled off the valve cover and the only gaskets are around the spark plug holes and around the outer edge of the valve cover, and of course all of the bolt grommets.
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