CEL MS3 Basic Sync Loss
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I'm getting a sync error (CEL 8) and I'm trying to pinpoint the cause. I'm thinking it looks like a crank sensor based off of the log. does anyone see anything different?
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The issue is happening randomly between 7000RPMs - 7800RPMs (Redline) and feels like I'm hitting a brick wall! This became a really big problem last month when I tried to run a trackday and was basically losing 1000RPMs worth of each gear. I was having to shift super early either coming out of corners or having to shift up again right before braking zones only to shift right back down again because I could no longer hold the gear like I used to.
It seams odd that I would have burned though a new crank sensor so fast but I'm at a loss for what it could be.
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Reverant: and you run no filtering, correct? I have had good success running a filtering scheme, but would rather not need to.
OP: If you switch from rising to falling, you may wish to recheck the base timing. I’m not sure how many degrees wide the tabs are.
OP: If you switch from rising to falling, you may wish to recheck the base timing. I’m not sure how many degrees wide the tabs are.
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Update: I made the changes listed below and was having issues getting the timing set when I switched to falling edge. It seemed like I kept getting timing drift. The drift only seemed to be with falling edge.
I tried to set it where most of the flashes on the timing light hit the right spot hit the drift was bad. I then used the FM digital angle finder to try and find the difference in degrees from the front side of a trigger wheel tooth to the back side and got a 5° difference so I adjusted the setting from -2° to 3° (probably not the best answer but I gave it a shot) The car was VERY unhappy with this setup and I only made it a few minutes down the road towards my "tuning" area before I had to revert the settings back to rising edge in order to make it back home.
Unfortunately I had to leave on the 21st for a training exercise and won't be back to the car until the 1st of August.
Do you know if there is another setting I need to adjust when going to falling edge? I saw the note in the settings saying the the setting needs to match the "tach input" I believe. But couldn't find a clear adjustable setting for this.
I tried to set it where most of the flashes on the timing light hit the right spot hit the drift was bad. I then used the FM digital angle finder to try and find the difference in degrees from the front side of a trigger wheel tooth to the back side and got a 5° difference so I adjusted the setting from -2° to 3° (probably not the best answer but I gave it a shot) The car was VERY unhappy with this setup and I only made it a few minutes down the road towards my "tuning" area before I had to revert the settings back to rising edge in order to make it back home.
Unfortunately I had to leave on the 21st for a training exercise and won't be back to the car until the 1st of August.
Do you know if there is another setting I need to adjust when going to falling edge? I saw the note in the settings saying the the setting needs to match the "tach input" I believe. But couldn't find a clear adjustable setting for this.
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Neko
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05-14-2021 10:35 PM