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Trigger Log of 3sge beams that wont spark correctly / start


rex@rexshort.co.nz

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Hi there. We have a Link G4+ Storm Blue wire in ecu. It is connected to to a Toyota Altezza 3sge 4 cylinder beams  (in a Lotus 7 replica) on the oem crank angle sensor and the intake and exhaust cam angle sensor.

 

The spark is extremely intermittent. We believe this is tied to an incorrectly configured trigger setup or potentially a faulty sensor. We have included an image of a scope showing trig 1 and 2. Trig 1 is crank, 2 is intake cam and di1 is exhaust cam. We have tested a wide range of trigger settings and at one point had it running on the Toyota 3sge profile but only for a short time. (the timing when checked with a light was perfect on the 3sge profile). Currently the spark fires very occasionally (every 3 revs or so but at the correct timing) and the detected RPM jumps all over the place although sometimes is holds a fairly consistent rpm of around 250. Could someone please have a look at the attached trigger scope and let us know if this is looking correct for a 36-2 stock 3sge timing ring. We have tried inverting it by swapping the wires and it didn't make too much of a difference except for being obviously inverted in the scope. 

90% of the time it is super inconsistent but occasionally it seems to somewhat work allowing us to run the engine. This has us considering potentially a faulty sensor or wiring too close to potential interference sources?

How do we calibrate/setup the correct offset (if required) between the crank and cams?

Whats the minimum battery voltage before it will start to cause issues?

Here is a link to a high resolution file: https://photos.app.goo.gl/2gaDSsJdY9M4PKML6 

 

Thanks, Rex.

Log of sync - Copy4.jpg

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