No crank signal - with 36-2 trigger wheel
4 Attachment(s)
I have posted thsi on other forums, but I probably need a Miata expert
I have a MS3 with MSx on an 03 Miata engine. Using latest firmware and tunerstudio. I am using a Flyin' Miata 36-2 timing wheel and am using it in TS as well. It looks like I am getting a CAM signal but not crank signal. I have seen that I am getting 12v and good ground to the sensor, but do not have an oscilloscope to see if I am getting something out. I have adjusted the pickup so it is VERY close to the timing wheel. I verified that the sensor wire runs from the connector to pin 25. I have verified ground and 12v as well (all of my grounds go back to the same few connections as I checked the MS and they all were the same) I have set the MS3 up as:V3.0 board - VR Input with pullup for hall sensors, LS2/58X, optical sensors or points a) Solder a link between VRIN and TACHSELECT b) Solder a wire between VrOUT and TSEL c) Install a 1k resistor (any value 470R - 2k2 is likely ok) in the proto area. Connect one end to the 5V hole and join the other end to VRIN with a jumper wire. d) With a small screwdriver, turn the pots, R52 and R56, about 12 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 6 turns clockwise. BTW, I am fairly confident in the circuit as it works with the JimStim as a 99-00 Miata I am leaning toward it being a bad crank angle sensor but not sure. Seems like if I have 12v and good ground going to the sensor and the signal wire is in the right spot, that I should see something in TS. I know that I am missing something simple, but am brain dead. HELP Mike |
you need to keep turning the pot CW.
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Originally Posted by Braineack
(Post 1119024)
you need to keep turning the pot CW.
I assume that it is a "pick up" of some sort. Is it something that if you go past the "sweet spot" that it will go back to no input or will it be just noisy? I did order a new sensor since I am not sure of this one (came with the salvaged engine) but my research tells me it is rare that they fail. $60 via Amazon for next day to know that the sensor is good is liveable. Thanks for the suggestion. |
just keep turning until you get the signal.
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Originally Posted by Braineack
(Post 1119050)
just keep turning until you get the signal.
Can I just keep starting (no more than 5 seconds or so at a time) while turning the screw? In other words, is that a real-time switch? |
you should be composite logging, not trying to start.
but you're at 6 turns now, go at least 2 more to 8. that's been my experience with the NB crank sensor at least. |
I bow to you Braineack... 8 turns was the trick.
She fired up but needs a ton of work to get it to run right. I assume that the injectors run A-D starting at the firewall and running to the front... Could I be wrong? |
1342 abcd
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Physically 1234 from the waterpump. Is it ABCD from the waterpump as well?
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