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Cam sync trigger tooth question
Posted: Sun May 10, 2015 3:18 am
by knastbigger
Hi Guys
When driving at low rpm I sometimes gets a misfire, have found out that I have strange trigger signal. Do you have any ideer why ?
The engine is a BMW M52B28
The crank and cam sensor is both VR from a M50 engine
The car runs fine and pulls clean, its only during low rpms
Re: Cam sync trigger tooth question
Posted: Mon May 11, 2015 12:44 pm
by Jadzwin
I would use option sensitivity switch (try to setup this option for as low RPM as possible) or use in series resistor (eg. 20K ) with cam signal .
Re: Cam sync trigger tooth question
Posted: Tue May 12, 2015 9:19 am
by knastbigger
Hi Jadzwin
Can you explain how dwell error is messured. I just got the same error at high rpm also, but now I dont see the cam sync trigger tooth at the same time
The coils are 0 221 504 004 (M52B28)
The dwell time is 1.65 @ 14 volt
Re: Cam sync trigger tooth question
Posted: Tue May 12, 2015 12:05 pm
by Jadzwin
The dwell error is the difference between required dwell and real dwell. It could change due to cranks shaft rotation speed change (dwell is issued one revolution earlier) or trigger errors.
In your situation the cam sync trigger tooth could be stable (+/- 2 teeth)
Re: Cam sync trigger tooth question
Posted: Tue May 12, 2015 11:27 pm
by knastbigger
Hi Jadzwin
Thanks, so it's just noise on the signal ?
BR Lasse
Re: Cam sync trigger tooth question
Posted: Wed May 13, 2015 4:27 pm
by Jadzwin
Looks like noise..
Re: Cam sync trigger tooth question
Posted: Fri May 15, 2015 2:50 am
by knastbigger
Hi
Just made a few logs with a scope, it look ok - right ?