ms3x vr circuit adjustment screw up
followed the westfieldmx5 ms3x guide before it was updated
EXCEPT instead of being smart and installing R52 and R56 with the adjustment screws up, I apparently decided to ignore the silkscreen picture on the board and soldered them with the screws down :facepalm: I couldn't figure out why adjusting these resistors couldn't get me into the 2.5v-3.0v range on R54 while turning R56 I'm also failing to do the same on the ms3x board while measuring R17 while turning R11 Did I break it by initially soldering the variable resistors wrong and jimstimming it? Am I just being even more noob by measuring the wrong place? I'm also hoping this is the cause of me not getting a trigger signal in the diagnostic composite log and thus not being able to start the car (have fuel, no spark) |
did you flip the pot resistors back around?
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yeah, switched them back around after I posted. I can get the mainboard pot to adjust to 2.75v
the ms3x one will adjust to 2.56v now, but that's the highest I can get it (was hoping for the same as on the mainboard) haven't tested it in the car yet to see if it'll start up question, when testing the voltage, I'm supposed to use any ground? or the nearest ground? not sure if there's a preferred ground to use when testing with the voltmeter |
just setup the ms3x ones exactly as written in the docs.
I've never had to adjust them other than exactly as documented (both mainboard and expander), always synced, no complaints, so never tested voltage. |
I had to adjust mine by measuring the voltage. MS3 was reading crank signal, but no Cam signal.
Just counting the turns did NOT work for me and I was off by 0.5V on the Cam signal and by 0.3V on the Crank signal (if I remember the voltages right). There is of course the chance that I didn't count right. |
You should se how many times I do it. I miss count at least 7 times.
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AND...... car is running :) thanks guys. Using a voltmeter helped after fixing the pots. Now to retune idle. Going from DIYPNP to ms3x is so much more complicated, yet the possibilities are endless
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Idle tuning is easier.
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I'm saying more complicated as in more things to adjust compared to pid, but definitely easier to get perfect, not to mention things make more sense in ms3
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since I've already got a thread up, might as well ask. in the ignition settings for the "ignition input capture" for the ms3, why is it rising edge? whereas in my diypnp, ignition setting are falling edge?
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Originally Posted by bmxfuel007
(Post 950351)
in the ignition settings for the "ignition input capture" for the ms3, why is it rising edge? whereas in my diypnp, ignition setting are falling edge?
This is simply the result of a design choice in the DIYPnP board as opposed to the MS3/X boards. Neither one is right or wrong in an absolute sense- choices of this nature are fairly arbitrary, and the result of the whim of the designer. |
love you guys. thanks for the info
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