CamAdvance or sparkadvance?

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HangaS Contact options for registered users 's Avatar posted on
August 20, 2012, 7:55 pm
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Hi,

Please take a look at this data grabbed via OBD from an E46 318i (Valvetron=
ic)

http://lab.hangas.com/lab/sample2.php  (last graph)=20


I'm puzzled about the Advance Value (OBD PID mode 0x01 0x0E).  The value is=
 suposed to be Timming Adv. in =BA relative to Cyl #1.


But I'm a but puzzled.. It throws values of about 40=BA some times.. and ab=
out -2 to -3 immediately after throttle release.  These values refer to spa=
rk advance or the cam advance of the valvetronic system?

Is 40=BA at 1500rpm a "normal" value? Cos at about 5000rpm is also reads ab=
out 40=BA

Can someone shed some light on this?   Just out of curiosity....

Thanks!=20


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