E38 code P1519 not going away...car idling rough

[Raffaeldvm@hotm]

Hi there. Our Father son project is stumping us.

Did a timing chain and guides replacement, new vanos sensors, new o2 sensors and new camshaft sensors but car still has a roaring sound when idling.

Runs great when going highway speed and has lots of power. It also sounds like it has a bad lifter.

When we clear the code it comes back immediately.

Not sure what else to try.

We bought parts on amazon...so not very expensive ones...

Any suggestions of what else to do/check/replace would be appreciated.

Raffael

[jclausen]

Check the fan clutch if it's locked up it will make a very loud noise

[Raffaeldvm@hotm]

I can turn the fan pretty easy when the car is not running. Is there a certain way to check it? Would that throw a code?

[MauiM3Mania]

Discussion moved to the E38 sub-forum.

[Timm]

[acspecialists]

As always nice work Timm!
Please include the code details it saves time for the people trying to help out. As for the rough idle you could post a video but I would start looking for vacuum leaks.

[kouks]

Here's one explanation. Seems like one of the VANOS is not operating properly (this is from the e39 forum):

P1519 is a function failure, not an electrical failure. It is saying that your intake cam is too far advanced while the VANOS is off.

This is an example of why replacing the part named in the code often does not fix the problem. An analogy for this code would be you arrive at work first thing in the morning, and flip on the lights to your office. But the lights do not come on. As far you can tell, the switch moved, it *felt* normal, but it didn't do it's job. So you report to building maintenance that you have a O-1345 light switch { function / rationality / performance } failure. Does this mean the light switch is bad? Maybe, but not likely. It's probably something else, but you don't know what. So you are reporting exactly what you know. The switch seemed to work, but you didn't get the expected results when operating it.

To set the code, the cam has to be over 480 crank degrees for more than 2 seconds, engine above 680rpm, vanos off. And yes, this is a two-trip code. First start it will set as a pending code. Second start, it will flag as a full code and turn the light on.

Could it be a stuck VANOS? yes. Could it be a mistimed cam? Possible, but not likely. Could it be bad seals? yes. Could it be a lack of oil feed to the VANOS? errrrr..... possible. Most of these require pulling the VANOS and inspecting.

[Raffaeldvm@hotm]

Hi there, back working at this car again....

[Raffaeldvm@hotm]

I think we have everything ruled out and we think it maybe not getting enough oil. When we did the timing there was a screen in the bottom of the pan by the oil pump....pretty sure we did not clean it perfectly. We did get new vanos sensors and tested them, new seals as well.
Thank you for your input and time