Crank Signal Issue
 

Got my LS3 (58x) swap running but having issues with sync errors. Reading this: https://www.diyautotune.com/support/...megasquirt-vr/ it mentions that if there are two seperate long bars that the sensor is wired backwards. I'm 99% sure it's right, but I have the two long bars like they described. Should I keep messing with r56 and r52 or try swapping the ground and signal wires on the sensor?

https://cimg3.ibsrv.net/gimg/www.mia...ad6d972abe.jpg

LS sensors are hall effect, not VR. You haven't mentioned which MS you're running (3.0, 3.57, ms3x etc) or what pullup resistor's you've got whacked on.

Sorry, it's a MS3x, with a 1k pull up to 5v.

https://cimg4.ibsrv.net/gimg/www.mia...d873f44417.jpg


He's a screen shot of the sync errors

Thank you......you didn't actually fix the issue but triggered me to look a little deeper at the basics. You are correct, the LS sensors are hall, but yet you set the MS up as a VR sensor and you tune the pots per the link I posted.

Here's the part I missed.

VR Input with pullup for hall sensors, LS2/58X, optical sensors or points
a) Find JP1 in the bottom right of the board. Place a jumper across positions 1 and 2
b) Find J1 in the middle of the board. Place a jumper across positions 3 and 4
c) Install a 1k resistor (any value 470R - 2k2 is likely ok) onto the pads marked R57
d) With a small screwdriver, turn the pots, R52 and R56, 7 turns anticlockwise (sometimes you may feel a "click" when the end position is reached, they can't be damaged by turning too far.) and then turn R56 back about 2 turns clockwise.

For anyone converting a megasquirt configured for a Miata to an LSx, the miata uses position 5 and 6 on JP1 which is inverted VR, where the LS needs regular VR.

It now revs cleanly to red line!

Gooflophaze is good help.