What about the filter?
I tried everything before I found out. Spent $$$$$ Thousands $$$$$ and my new #1 mechanic spotted it almost right away and fixed it all up for about $500 (Most of that was the second hand harmonic balancer)Ok thanks wolfie, never heard of it but will look into it!
Who told you that? :rofl:Just been to get the part from bmw and the e46 doesn't have a knock sensor so that rules that out
When you start the car, the engine runs on a basic fuel/air map/programme, and is not using the MAF and certain other sensors. After the first 20 secs or so, it switches to real-time monitoring/adjusting based on sensor inputs. So the engine is getting conflicting info - the MAF is saying X amount of air is coming in, but something is causing it to run poorly based on that input. Either an air leak, fuel pressure issue, or maybe your pre-cat o2 sensors are giving out. If they have near 160k kms or more, they should be replaced. They give the readings to the computer after combustion to tell if anything's off in the mix. If they don't perform well, you can get sketchy feedback and improper real-time engine mix adjustment.Ok since the my last post I came to the conclusion that my problem was through incorrect air intake so was told to unplug the maf and run the car like that. After doing this the car ran great, obviously still not perfect but loads better, so went out and bought a new maf, after installing and plugging it back in my original problem is back! Car is sluggish, misfires and sounds ****e. What else could this be if it runs well without the maf plugged in??
Oh yeah, typical for me to get the 1 : 1,000,000 problem and spend a fortune finding it.Bingo! But still probably a long shot that it's the problem here. Not common for the HB to go bad and trip the sensor.
Options are good to have. What kind if codes did you have? EDIT: found the thread. Interesting there's no code for the knock/ping.Oh yeah, typical for me to get the 1 : 1,000,000 problem and spend a fortune finding it.
But I only mention it as an option, certainly wouldn't go out and change it until it's proven!
No CEL either. Was a really odd problem! Got to the bottom of it in the end by noticing that the HB had a half inch run out on it, noticeable on closer inspection. As you see it was full of cylinder misfire codes, and my suspicion was fuel cut off on those cylinders also after doing the coil pull test.Options are good to have. What kind if codes did you have? EDIT: found the thread. Interesting there's no code for the knock/ping.
thanks for the picture. I made replacing my electric vacuum control valve much easierYou're headed the right way, most likely a vacuum leak. If you don't find any on the elbows, verify that the dummy plug behind the manifold was installed after the replacement motor. The DISA can leak too if the diaphragm is torn, so check for that too while you have it out.
Courtesy of another member:
<a href="http://www.flickr.com/photos/[email protected]/9952974046/" title="intakemanifoldvacuumrea by cvx5832, on Flickr"><img src="http://farm3.staticflickr.com/2847/9952974046_61aba98630_o.jpg" width="640" height="480" alt="intakemanifoldvacuumrea"></a>