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Old 05-01-2012, 09:40 AM   #1
mizter_pino
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Exclamation My Story on solving misfires

Since there are a lot of misfire threads, i would like to give my 2 cents to help some people.
Most people don't explain it detailed but, i'm gonna explain it in detail so bear with me.
It worked on my car,
so if you have the same crap i had down below. (text, not something else)
This will do it for you in most cases, if it doesn't then your problem lies IN your engine.
And then, sucks to be you.

I have a 330ci 08-2001 manual 5 speed euro spec 180.000km/111.801miles.
My car was having a lot of misfires. Misfires on ALL cilinders 1 to 6. (1 faultcode; misfire on cilinder 1 - 6)
But...no engine code light, never!
Really high fluctuations on all cilinders, compression wise.
It was like driving a tractor, only mine was even slower lol.
It wouldn't go further then 2000 rpm.
Because the software wasn't giving my cilinders any fuel to prevent more damage.
The weird issue was when i started the car and i left it idle, the car would go tractor on me.
But when i started the car up and immediatly drove away there was nothing wrong, the car was doing its normal thing.
Only difference was, that my fuel economy was really bad.
It was around 20mpg to 23 at its best.
A lot of people will say that that is normal, but it isn't.
A good operating 330 should be doing around 25 to 28 with ease!

So i went searching like crazy on the web.
This is what i did before finding the solution;
New spark plugs, improved fuel economy a Bit, still same faults.
New disa, didn't do anything because the old one wasn't busted.
New upper and lower intake boots, yes they were ripped, but i didn't have any idle problems to start with anyway.
I did the ccv check with a plastic bag, but that was just dandy, nothing there.
I replaced my valve cover gasket VCG, had some oil leaks, but didn't do aything for the misfire problem.
I did a engine flush, didn't do a thing.
I changed my oil to castrol edge 0w-30 and replaced my oil filter, still nothing.
I checked/swapped my coils, i have bosch versions stock, it didn't do nothing.

There were no other fault codes except the code; misfire on all cilinders 1 - 6

So in a last attempt.
I unplugged my maf and there was no change.
Because!
Remember what i said, when i started the car and drove away immediatly that the car would run fine but still with misfire codes...
So if your engine runs fine to the Eye, unplugging the maf wont do squat.

Finally i unplugged the maf after starting the car and letting it idle.
Remember, that i said when doing so the car would run like a tractor.
So when unplugging the maf in the tractor state the engine would go running smooth again.

So, i changed my maf although (again) my software didn't give ANY maf fault codes of it being broken or what so ever!
A new maf at the dealer here is 514 US dollar..

Everything is perfect now. It runs great.
My fuel economy went to 27.32 mpg ALLROUND (city and highway).
32.3 mpg on the highway at 100kph/60mph ~2500rpm 5th gear.
~30 mpg on the highway at 120 kph/75mph ~ 3000 rpm 5th gear.
FIY, I run on octane 95.

Changing my maf to a new maf did the trick for me.
Altough there weren't any fault codes on various faultcode readers.
I had 3 different diagnoses with 3 different softwares, which one of them was the dealers'.

Also you could try cleaning your maf.
Only imho it will maybe! run better then it was, but it will never run as good as with a new maf.

On a sidenote.
I took my baseball bat and smashed the old maf into orbit.
And it felt great!
Yeah im on crazy pills, you can't have what im having unless you go through i went through lol.

I hope this helps you all.
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Last edited by mizter_pino; 05-10-2012 at 04:26 AM.
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Old 05-01-2012, 09:43 AM   #2
Mango
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Wow. Just wow. Condense some? Glad you got your problem fixed. All you had to do is put it like this:

Had misfires. It turned out to be the MAF.
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Old 05-01-2012, 09:47 AM   #3
mizter_pino
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Quote:
Originally Posted by E46Mango View Post
Wow. Just wow. Condense some? Glad you got your problem fixed. All you had to do is put it like this:

Had misfires. It turned out to be the MAF.

no beacuse if you had read my story,
there are a lot of solutions out there but not with
enough information
it's always a bit of this and a bit of that
if the solution was out there, i really wouldnt have bothered to do this write up
and i didn't have to change so many parts on my engine before finding out
that it was my maf

hopefully you understand it now
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My Surinamese grammar sucks. So Excuse me!
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*Heavy sigh...

I'm weird, but honest!
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Old 05-01-2012, 10:16 AM   #4
Mango
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Quote:
Originally Posted by mizter_pino View Post
no beacuse if you had read my story,
there are a lot of solutions out there but not with
enough information
it's always a bit of this and a bit of that
if the solution was out there, i really wouldnt have bothered to do this write up
and i didn't have to change so many parts on my engine before finding out
that it was my maf

hopefully you understand it now
Had misfires, changed disa, plugs, etc, etc, didn't work. Turned out to be the maf.
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Old 05-01-2012, 10:44 AM   #5
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if you have nothing constructive to add
i would like you to stay away from this thread
and let people react who do appriciate this thread
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*Heavy sigh...

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Old 05-01-2012, 10:53 AM   #6
Mango
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Oh, what I'm adding is very constructive. Notice nobody has read your post or replied to it yet? Trying to help you get noticed. Condense.
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Old 05-01-2012, 01:24 PM   #7
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Quote:
Originally Posted by E46Mango View Post
Oh, what I'm adding is very constructive. Notice nobody has read your post or replied to it yet? Trying to help you get noticed. Condense.
+100

The story (and esp its formatting) could use some condensing. Mango's trying to make your thread more digestable, he's not ragging on you.
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Old 05-01-2012, 03:22 PM   #8
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Thanks for contributing OP
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Old 05-01-2012, 04:18 PM   #9
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hmmm... Looks like my issue too OP. Its great that you sorted it out.
Thanks for sharing.

So far: VCG, VANOS seals, air filter, intake boots, fuel filter, spark plugs, DISA(checked and it is not busted), changed the oil from bmw 5w30 to mobil 1 0w40; didn't change my mpg.
I still get 19-21mpg mixed on 91 octane.

My next shots are O2 sensors and then MAF. I would hate it to be the MAF as it was in your case, and find it out at last.

No SES lights by the way.
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Old 05-02-2012, 04:22 AM   #10
mizter_pino
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Quote:
Originally Posted by jojo12 View Post
+100

The story (and esp its formatting) could use some condensing. Mango's trying to make your thread more digestable, he's not ragging on you.
Allright, i made it easier to read. And condensed it as far as i could.
Still don't see positive criticism from mango, but i appreciate it anyway.
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My English grammar sucks. So excuse me!
My Dutch grammar sucks. So Excuse me!
My Surinamese grammar sucks. So Excuse me!
My Hindi grammar sucks. So Excuse me!

At least I have a big weener...
*Heavy sigh...

I'm weird, but honest!
Can you sue me for that?
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Old 05-02-2012, 04:26 AM   #11
mizter_pino
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Quote:
Originally Posted by trj View Post
hmmm... Looks like my issue too OP. Its great that you sorted it out.
Thanks for sharing.

So far: VCG, VANOS seals, air filter, intake boots, fuel filter, spark plugs, DISA(checked and it is not busted), changed the oil from bmw 5w30 to mobil 1 0w40; didn't change my mpg.
I still get 19-21mpg mixed on 91 octane.

My next shots are O2 sensors and then MAF. I would hate it to be the MAF as it was in your case, and find it out at last.

No SES lights by the way.
i also think its your maf, if you say you have the same things i had.
i really dont think o2 sensors can make your car misfire that much
the 2 in the front dont do a alot
the 2 o2 sensor in the are the most important for smooth running.
so IF it's your o2 sensors (which i dont believe)
then it would likely be your 2 o2 sensors in the back

fiy i use octane 95
but that shouldn't make that much difference
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My English grammar sucks. So excuse me!
My Dutch grammar sucks. So Excuse me!
My Surinamese grammar sucks. So Excuse me!
My Hindi grammar sucks. So Excuse me!

At least I have a big weener...
*Heavy sigh...

I'm weird, but honest!
Can you sue me for that?
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Old 05-02-2012, 04:43 AM   #12
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Remember some of our models can use the Hyundai MAF; the same Siemens, just for a lot less money.

...and for Mango, my reverse cribs...

So, when I was born many years ago, I dreamed of owning a bmw...and then one day...
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Old 05-02-2012, 08:17 AM   #13
trj
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Quote:
Originally Posted by mizter_pino View Post
i also think its your maf, if you say you have the same things i had.
i really dont think o2 sensors can make your car misfire that much
the 2 in the front dont do a alot
the 2 o2 sensor in the are the most important for smooth running.
so IF it's your o2 sensors (which i dont believe)
then it would likely be your 2 o2 sensors in the back

fiy i use octane 95
but that shouldn't make that much difference
I do not have any misfire codes. I am just trying to get better mpgs. So let's see.
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Old 05-08-2012, 09:38 PM   #14
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I think I have this issue. but I dont feel any difference in power or struggle to speed up. My MPG is still awesome ever since I got the car. Would cleaning the MAF fix the issue?

I know 6 spark plugs cant all go bad at the same time, and neither can 6 coils. It has to be something other then the obvious.
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Old 05-08-2012, 10:14 PM   #15
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Quote:
Originally Posted by E46Mango View Post
Oh, what I'm adding is very constructive. Notice nobody has read your post or replied to it yet? Trying to help you get noticed. Condense.
His information helps point someone who has gone half way to replace those parts and is looking for a quicker solution...but thank you for taking your time and for condensing it for us...this is your contribution.
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Old 05-08-2012, 11:47 PM   #16
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I have similar symptoms on my 325xi (2003)...is this the part I 'might' need?
http://www.ecstuning.com/BMW-E46-325....5l/ES2091378/

Thanks!
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Old 05-09-2012, 03:47 AM   #17
mizter_pino
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Quote:
Originally Posted by euromade View Post
I have similar symptoms on my 325xi (2003)...is this the part I 'might' need?
http://www.ecstuning.com/BMW-E46-325....5l/ES2091378/

Thanks!

yes but i would NOT recommend you the mtc version

i would recommend the vdo version

yes it makes a lot of difference
the dealer version is also a vdo

because the vdo part measures the air a lot better (finetuned) then the mtc part
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My English grammar sucks. So excuse me!
My Dutch grammar sucks. So Excuse me!
My Surinamese grammar sucks. So Excuse me!
My Hindi grammar sucks. So Excuse me!

At least I have a big weener...
*Heavy sigh...

I'm weird, but honest!
Can you sue me for that?
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Old 05-09-2012, 03:48 AM   #18
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Quote:
Originally Posted by E46tknv View Post
I think I have this issue. but I dont feel any difference in power or struggle to speed up. My MPG is still awesome ever since I got the car. Would cleaning the MAF fix the issue?

I know 6 spark plugs cant all go bad at the same time, and neither can 6 coils. It has to be something other then the obvious.

pm-ed you
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My Dutch grammar sucks. So Excuse me!
My Surinamese grammar sucks. So Excuse me!
My Hindi grammar sucks. So Excuse me!

At least I have a big weener...
*Heavy sigh...

I'm weird, but honest!
Can you sue me for that?
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Old 05-09-2012, 10:50 AM   #19
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Quote:
Originally Posted by mizter_pino View Post
yes but i would NOT recommend you the mtc version

i would recommend the vdo version

yes it makes a lot of difference
the dealer version is also a vdo

because the vdo part measures the air a lot better (finetuned) then the mtc part
Well this morning I fired up the car and I did not idle good...once the MAF was unplugged it ran really smooth with somewhat higher RPMs.
I took a can of MAF cleaner out and sprayed the whole unit. There was quite a bit of dirt/particles in the metal screen.
Once I put everything back my idling was much smoother and I felt more power when I took it for a test drive....will report back if something changes but as of now I'm considering this issue solved.
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Old 05-09-2012, 11:05 AM   #20
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Quote:
Originally Posted by mizter_pino View Post
Since there are a lot of misfire threads, i would like to give my 2 cents to help some people.
Most people don't explain it detailed but, i'm gonna explain it in detail so bear with me.
It worked on my car,
so if you have the same crap i had down below. (text, not something else)
This will do it for you in most cases, if it doesn't than your problem lies IN your engine.
And then, sucks to be you.

I have a 330ci 08-2001 manual 5 speed euro spec 180.000km/111.801miles.
My car was having a lot of misfires. Misfires on ALL cilinders 1 to 6.
But...no engine code light, never!
Really high fluctuations on all cilinders, compression wise.
It was like driving a tractor, only mine was even slower lol.
It wouldn't go further then 2000 rpm.
Because the software wasn't giving my cilinders any fuel to prevent more damage.
The weird issue was when i started the car and i left it idle, the car would go tractor on me.
But when i started the car up and immediatly drove away there was nothing wrong, the car was doing its normal thing.
Only difference was, that my fuel economy was really bad.
It was around 20mpg to 23 at its best.
A lot of people will say that that is normal, but it isn't.
A good operating 330 should be doing around 25 to 28 with ease!

So i went searching like crazy on the web.
This is i did before finding the solution;
New spark plugs, improved fuel economy a Bit, still same faults.
New disa, didn't do anything because the old one wasn't busted.
New upper and lower intake boots, yes they were ripped, but i didn't have any idle problems to start with anyway.
I did the ccv check with a plastic bag, but that was just dandy, nothing there.
I replaced my valve cover gasket VCG, had some oil leaks, but didn't do aything for the misfire problem.
I did a engine flush, didn't do a thing.
I changed my oil to castrol edge 0w-30 and replaced my oil filter, still nothing.
I checked/swapped my coils, i have bosch versions stock, it didn't do nothing.

There were no other fault codes.
None!

So in a last attempt.
I unplugged my maf and there was no change.
Because!
Remember what i said, when i started the car and drove away immediatly that the car would run fine but still with misfire codes...
So if your engine runs fine to the Eye, unplugging the maf wont do squat.

Finally i unplugged the maf after starting the car and letting it idle.
Remember, that i said when doing so the car would run like a tractor.
So when unplugging the maf in the tractor state the engine would go running smooth again.

So, i changed my maf although (again) my software didn't give ANY maf fault codes of it being broken or what so ever!
A new maf at the dealer here is 514 US dollar..

Everything is perfect now. It runs great.
My fuel economy went to 27.32 mpg ALLROUND (city and highway).
32.3 mpg on the highway at 100kph/60mph ~2500rpm 5th gear.
~30 mpg on the highway at 120 kph/75mph ~ 3000 rpm 5th gear.
FIY, I run on octane 95.

Changing my maf to a new maf did the trick for me.
Altough there wasn't any fault codes on various faultcode readers.

On a sidenote.
I took my baseball bat and smashed the old maf into orbit.
And it felt great!
Yeah im on crazy pills, you can't have what im having unless you go through i went through lol.

I hope this helps you all.
I'm confused that your car could run so poorly AND not have the Check Engine (SERVICE ENGINE SOON) light be on, and not have stored codes in the range of P0300 through P0306 and the occasional P0313, not to mention codes in the P01nn range.

I'm not saying you misdiagnosed the problem, but I am saying that the computer should have told you why the engine was running so poorly. I am saying that you may have more problems than you have fixed BECAUSE the problem you fixed should have lit the SES light and stored a dozen or so service codes.
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