Replaced MAF, still errors.....

[jhandy]

do you have a oil mist/dirt all over the top of your motor? Do you have liquid oil in the throttle body? (not allways true) do you have a sucking vacum sound with the cap off and car running? Does your car seem to use oil more than it regularly does?

If yes to these, then the AOS is not working well. If it fails, you will know. Plumes of white smoke will come from your car. or lock up with oil in the cylinder ( this could kill the motor).
From my understanding, AOS is like the water pump. Replace it every X years. They are cheap. motors or tow trucks are expensive.

[sparker]

Ok bad news... Just drove car again, CEL misfire cylinder 3 (plus those other two again). Assuming I swapped the right coils and plugs over (right rear two) I guess I need to inspect the loom?

Any other suggestions?

Sam

[sparker]

As for AOS, there is no oil over motor - I will check throttle body again but I believe it to be ok. As for the sound with the oil cap off, yes, there is noise but I would expect there to be. The car won't idle with this off though - can someone please confirm if this is a good or bad sign?

Thanks guys,
Sam

[jhandy]

yes that is normal to not run smoothly with the oil cap off. That is why when the oil fill tube leaks, the car will run like crap, but looks normal.
If you are not using excessive oil or leaking oil into the throttlebody or as a mist covering the motor the aos sounds fine. There realy is not way of telling for sure if it is getting weaker. it is usally a failed-or not failed thing. Thats why it is advised to replace it as maintance every few years.

[jhandy]

Originally Posted by sparker

Ok bad news... Just drove car again, CEL misfire cylinder 3 (plus those other two again). Assuming I swapped the right coils and plugs over (right rear two) I guess I need to inspect the loom?

Any other suggestions?

Sam

OK, assuming you pulled the correct pack you have ruled out the coil pack as a cause of the misfire code. Check the next thing back in the line to the third cylinder. Is the wire ok, not cuts, shorting on body, clean conection?

Cylinders 1 2 and 3 are located on the right (passenger) side of the engine, which #1 being the 1st cylinder of that bank (#1 is the one up front, 2 middle, 3 back) and so on. Cylinders 4, 5, and 6 are located on the left (driver's) side of the engine with #4 being the 1st cylinder of that bank.


Anyone out there with a direction to point him to? What is the next common cause of a misfire if it is not the coil pack/plug/or wire?

[sparker]

I'm actually leaning towards an intake leak at the moment causing cylinder three to run lean and misfire. The other cylinders probably would error too if I went further.

Just think there must be a reason for my wideband to read so lean on that right hand side bank. Lack of spark would make it run rich.

That being said, I will still inspect the wires to that coil in case it is the issue. Will also look at I injector wires to cylinder 3.

Sam