Engine Bay Sounds

[Oli77]

MAF on or MAF off does not matter, sound persists.

8 pending codes, Misfire, O2 sensor, Fuel, Comp, Catlyst, Evap, Sec Air, O2 Htr.

And then after running without MAF, I got P0102 and P0113

[rguti153]

Injectors

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[Oli77]

I cleared the codes. Will drive a bit tomorrow and see if they come back.

I hope some of these codes were 'leftover' from another car I scanned (not sure).

I will be gone most of the day tomorrow but will be coming back to this thread ASAP as I'm worried. It does sound like top of engine noise.

Bad injector(s) you think would cause this metallic rubbing knocking sound?

Mummy!

[Hornung418]

Don't freak out. Run a bottle of Techron in your next tank and clean out your injectors. It definitely sounds like a misfire to me. And it will clank and creak if its beyond the DMEs ability to correct the knocking.

Scann it tomorow when the codes come back.

Just keep in mind that the O2 related code is telling you that the oxygen sensors are still working. But the O2 heater code worries me.

Sent from my GS3.

[Oli77]

Thanks for those comforting words. I will do that and report back tomorrow. About 3 months ago I did run a third of a bottle of seafoam in the gas tank. It made my idle smoother (no more dip).

[Oli77]

Injectors

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Don't freak out. Run a bottle of Techron in your next tank and clean out your injectors. It definitely sounds like a misfire to me. And it will clank and creak if its beyond the DMEs ability to correct the knocking.

Scann it tomorow when the codes come back.

Just keep in mind that the O2 related code is telling you that the oxygen sensors are still working. But the O2 heater code worries me.

Sent from my GS3.

So your theory sounds right. You think I have weak function on one cylinder or 2 that is causing the engine to sound a bit limpy?

It's weird that I can't feel a loss of power and No upfront codes. The only codes so far are "pending". No dash light.

Drove 4 miles filled up + techron bottle. 4 codes came back, Evap, Catlyst), O2 sensor, O2 htr.

[Hornung418]

Keep monitoring it. Your O2 sensors are a lot cheaper than ours. Think I paid ~$100 for both when I did the 328i sensors.

Sent from my GS3.

[Oli77]

You feel it is OK to drive it normally? or am I risking a disastrous failure?

[Hornung418]

You feel it is OK to drive it normally? or am I risking a disastrous failure?

Doesn't sound too horrible. As long as the engine is running smoothly and not shaking like crazy you should be okay.

Mine was knocking and pinging, the car would shake and the idle was rough. If thats not happening, you will be fine to further process the situation.

Sent from my GS3.

[Dave1027]

How about taking a two foot piece of hose. Put one end to your ear and the other to various spots on the engine to localize the noise.