[lustek]

Hi,

Working on e46 with N42 engine. 
When I disconnect ex. camshaft sensor and start car and rev to aboute 3000rpm everything seems to be OK. After hitting 3000rpm its start rattles and in most cases die while rev down. 

When i connect ex. cam sensor car start ok but after a while it start shake and sometimes die.

Only fault that is logged is aboute ex. cam. sensor signal

What I have done yet:
- replaced valvetronic module becouse was fired
- learn vvt limit pos and clear adaptation
- check complete wiring on engine bay (becouse of fired vvt ecu, find one sensor makeing short circuit). All wires are ok
- move cam sensor from in and ex camshaft
- check sensor with metal - voltage drop from 12v to 0v
- timming
- unplug both vanos sensor, both cam sensor, vvt motor but rattles after 3000rpm remain

Anybody have any other idea what I can check?

[tintoverano]

you'll need a scope to see what's going on with cam, crank and timing

do you get any DTCs?

[lustek]

you'll need a scope to see what's going on with cam, crank and timing

do you get any DTCs?

Have only ex. cam sensor fault when car start rattles and shakes.
Strange is that, car start rattles even when i dosconnect all sensors...so its something mehanicaly, not electric

[jaki]

Have only ex. cam sensor fault when car start rattles and shakes.
Strange is that, car start rattles even when i dosconnect all sensors...so its something mehanicaly, not electric

My guess is jamming VANOS mecanics.

[tintoverano]

you'll need a scope to see what's going on with cam, crank and timing

do you get any DTCs?

Have only ex. cam sensor fault when car start rattles and shakes.
Strange is that, car start rattles even when i dosconnect all sensors...so its something mehanicaly, not electric

when timing is off, unplugging sensors won't help - you need to check cam crank correlation

[lustek]

you'll need a scope to see what's going on with cam, crank and timing

do you get any DTCs?

Have only ex. cam sensor fault when car start rattles and shakes.
Strange is that, car start rattles even when i dosconnect all sensors...so its something mehanicaly, not electric

when timing is off, unplugging sensors won't help - you need to check cam crank correlation

Record some signal data with scope. 
Can somebody help me analysis this data?

01 - recorded crankshaft signal. Camshaft sensor disconnected. Car running OK. I thing something wrong here becouse it should generate different signal wave. It is hall sensor but generate signal like inductive sensor. Or I am wrong?

02 - recorded crank and ex. cam signal data. Both sensor connected. Car running not OK

03 - recorded ex. cam sensor only while engine running not OK

04 - recorded ex. cam sensor only while engine running OK

On 01, 03 and 04 there is also additional refferenced wave.
Signal from in and ex cam sensor looks same. 

Dont have much exp. using scope so sorry if I collect this data wrong way.
Are this data can tell anything or not?

thank you very much for help

[bmchicago]

did u check oil level and quality?

[lustek]

did u check oil level and quality?

Hi, 
yes oil level and quality are OK.

At the moment car have disconnected ambient temp sensor and have faulty oil level sensor but i think its not related.
I disconnect this sensor and car run same