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m50 crank signal

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Both crank and cam are incorrect polarity in that capture.  Also with the cam tooth being right in the middle of the crank gap could potentially be a problem.  Set the trig 2 like below usually works best in this case (set as hall instead of reluctor):

2vru13c.png

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Yes, since we are not worried about the timing accuracy of the cam pulse, changing it to hall allows us to choose rising edge which is safely to the left of the crank missing teeth area.

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Correct, with a missing tooth crank wheel the cam is only used for phase detection.  So really the most important aspect is the cam edge that you are using must always occur on the same side of the crank gap.

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Photo is too blurry to see the cam signal well, you would be better to use the save as log feature.

One thing I can see though is your crank sensor is wired incorrect polarity.

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hello,

this is the last thing a made it , cam is hall , rising, car running normally  till rev limit, is that right?? although crank look weird

thanx

aaa.jpg

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Cam sensor is wrong polarity by the looks.  Can you swap the wires and do it again.  Offset will probably need to change by 360deg when you swap it.

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The zero crossing of trigger 2 is very close to the index tooth on trigger 1 (the first edge after the gap). It may work ok for a short time like this, but any small movement between cam and crank - say due to belt stretch or thermal expansion could cause a trigger error.  Changing trig 2 to hall & rising means you are then triggering of an edge that is further away from the gap so it will have much more tolerance to cam movement before a trigger error can occur.

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Hello,

i change the cam to hall, rising, resistor off, the engine didn't start at all, return to vr , it start but it didn't run smooth as the polarity was reversed

Any idea??

thanx

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Did you change the offset by 360deg?

 

On 1/26/2019 at 9:53 AM, Adamw said:

Offset will probably need to change by 360deg when you swap it.

 

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Yes.  If it was originally 276 then to change the offset by 360 you need to set it to -84.  You also need to test this with a timing light, dont just use a number because someone else with the same engine used it.

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Hello,

the last thing i did , -84 offset , cam hall, rising, is that the right thing?? the signal of the cam is near from the crank gap

thanx

 

84.jpg

842.jpg

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Ok thanx for support

last 2 question

is this near cam signal from crank gap can make problem in high rev??

is the arming table is perfect??

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