flamex10

Hi boys, today, to get off half car and I have performed the followings jobs:
Pulitura systematizes secondary air;
Pulitura injectors.
I have checked the Vanos, and I have become account that the valve of pressure is already installed.
Unfortunately the continuous car to have the same defect, and it is really a strange defect.
I try to make him/it understand..., then, the car goes a splinter, however if I make her/it take back from 1000 rpms in 4 as soon as it reaches 1800 rpms it loses hits and it beats in head up to 2000 rpms, then it goes normal.
Another strange thing is that when it makes this problem, he feels odor of gasoline not burnt, so much strong that the air inside the car becomes unbreathable.
Does someone know what you/he/she can be?
I have already replaced the ignitions coil, the sparks, the MAF, the filter of the gasoline, the sensors of o2, the sensor of temperature motor.
I don't know thing anymore to do...

Did I forget to tell you that I feel noise of chain of distribution, you/he/she could be that I must replace the you extend chain because the slow chain can delay the phase?

Beamer_usa

If the odor of gas is that bad, there must be a gas leak somewhere

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flamex10

There is no anybody crack because with the closed glasses he doesn't feel.
The odor that I feel is not of pure gasoline, but of fat mixture too too much.
This odor originates from the exhaust and I feels him/it when, to 1800/2100l rpms, the car goes badly.

ard

Any check engine lights?

Are there any stored codes in the engine computer?

Has a BMW dealer looked at this?


A

richie_rvf

Did you try the CPS?

Could be a reason for incomplete combustion leading the the smell from the exhaust??

flamex10

The technical bmws have checked and from the diagnosis there is not any error except that classical of the secondary air.
I have reversed to the right from left the cps but nothing is not changed.
The diagnosis bmw doesn't notice any defect to the cps.
I must add that the car turns very minimum good, any hesitation of it loss of hits.
Could you/he/she be the sensor of rmps, that he/she doesn't read well to that rpms?

KBK

Isn't 1600-1800 rpm where the vanos system is really just starting to work or starting to be 'active'? Could it be a timing issue or a cam postion itself being off. ie, bad vanos pressure? or has that been looked at? Do a leakdown test on the motor, maybe? How many km on the engine?

also, grounding of the coil wiring is important on these motors, with the coil being at the plug itself. Check the motor's ground straps. one or two might be loose or bad, in terms of fraying, or connectivity to the proper ground point. This is a common problem on motors, not just this one. There are ground straps connected to the heads, under the sparkplug access covers. These ground straps are important. A grounding issue could very well lead to the issues you are experiencing.

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flamex10

Unfortunately the vanos has not been checked.
Where are the connections of earth of the sparks positioned?
Indeed as you you say, it would seem a problem of spark but me I have ambled all the ignitions complete coil and the sparks.

KBK

I had a bad ground connection for ONE sparkplug, on the right bank. This lead to much misfiring, and stumbling. It fouled the plug, and it was due to a stripped ground point for that ground, on the heads. The ground wires for the coils are done with brown colored 18 guage teflon shielded wires, and are right on the heads themselves, two or more per cylinder bank. This is where my ground was bad. it would also cause the car to go into 'limp' mode if the humidity (raining) was high, and if I was heavy on the throttle. I fixed this grounding issue, and my stumbling, CPS warnings, plug fouling, and limp mode issues went away. A bad ground will affect timing for that cylinder, in terms of spark strength and timing of that spark.

The screw holes for the grounds are easy to damage, with over-torquing.

Lucky for us, BMW was thinking ahead, and provided deep screw holes, where a longer bolt can be inserted after an issue with stripping the upper part of the bolt hole for these ignition coil ground straps. I'm not saying this is your solution, but it should be looked at.

I personally have very limited knowledge of these motors, but my problem was as outlined, and it was my particular solution. Hopefully this helps you.

A BMW mechanic might have found it quickly, but that would not have done the particular BMW shop any favors, as my car was under warranty at the time. They likely would have changed everything under the sun, and charged BMW for it all. Good method to make money, a financially captive BMW company!

I live over 200 miles from the nearest BMW shop, so I found it and fixed it myself. I had no time or desire to spend large amounts of my life, time and money shuttling back and forth from the BMW shop I bought the car from, which was over 400 miles away. Took me all of a few hours to figure it out. Truthfully, I found the bad ground by accident as I was swapping the plugs out to see if that was the source of my issues.

flamex10

I have tried to look at the sparks to make I count me if one or more sparks burn badly, but I have realized that you/they burn badly all.
If there is a problem in the thread of earth it is surely between thread and carcass of the auto.
I will check...
But, the cps, that defect gave you?

Evil One

Hi all,
Flamex10 asked me to try and translate the above into more readable english for him, so here goes (hope I do it right LOL)...

I've cleaned the secondary air system and the injectors, and while looking at the vanos I realised I already have the pressure valve installed.
However I've still got a strange set of symptoms that continue to present themselves: The car drives fine but if I let the rpm drop back to about 1000 in 4th then accelerate it starts to miss-fire at about 1800rpm then pings until I reach about 2000rpm then is fine after that.
While the missfiring and pinging is going on I get a very strong smell of un-burnt fuel in the car - so strong that it is unbearable in the cabin.
Anyone got any ideas what this could be?
I've already replaced the ignition coils, spark plugs, MAF, fuel filter, o2 sensors and engine temp sensor.... I don't know what else to do....


The last bit about the 'chain of distribution' I don't understand at all, sorry . Flamex10, please post it in italian or PM me and I'll try to translate it.

Hope this helps
Cheers

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