Incorrect CAS signal in tuning

[keyzer_sean]

Hi everyone, hoping someone has run into a similar problem and can shed some light.
I'm trying to tune a 4ze1-t running a Link G4 Atom which I just finished installing a flying loom on.
During the pre-start up tests, when I got to testing the CAS after selecting the Nissan Optical 360 style sensor - it would give out really random signals. Sometime's when I twisted the shaft it would give no injector clicks then randomly start signalling but then have random dead spots? I tried a different sensor setting (LS1, Evo etc.) and it would give consistent signals but obviously in the wrong frequency and pattern as the software thinks it's a different sensor.

IS MY CAS STUFFED? IS THERE SOMETHING I'VE DONE WRONG IN THE SOFTWARE? IS MY WIRING OF THE TRIGGERS WRONG?

[Jonno]

Paging Mick and Scott!

[sandy]

id be looking at the wiring dude, if its getting mixed signals when you spin the shaft and effecting things like your injectors

[DR_GEM]

Haven't got experience with the link / vipec systems so dont know what your options are for cas type, but would suggest changing optical pickup type to a 36-1 arrangement as the e1 CAS is more akin to a home signal reluctor.

[moley]

Dumb question but is your cable shielded?

[Burntrubber]

The Nissan and 4z trigger wheels are different that could be it. Nissan one has one bigger slot on the 4 tdc ones. The 4z ones are all the same.

[archangel62]

4Z work as a pull-down voltage. You need to supply the signal wires with voltage via a 1K resistor, then the dizzy grounds it, creating the square wave. No voltage = no signal. There's a very strong chance your ECU isn't supplying the signal wires with a voltage, my Megasquirt wasn't. This has come up a few times recently, so I did a write-up.

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