ecu voltage dropping

[scottc1088]

I have a emu installed in my Nissan skyline on a turbocharged 1uzfe engine which I am having problems with the ecu voltage fluctuating
iv just fitted Honda k20 coils in favour of the twin distributor setup and have noticed the problem, im not 100% sure if it was there before fitting the coils but I don't think it was
battery voltage is stable as is the 12v feed to the ecu

any ideas what the problem could be?

[WHPZach]

Post up a log or a screenshot of the behavior you're describing and tell us exactly how the ECU is grounded (which wires go where, etc.).

[scottc1088]

file posted
sure all earths are to engine block with sensor ground going to ecu
will check soon

[scottc1088]

all earths go to engine block, any other ideas?

[Jan32]

Did you have also an bigger ground connection from the grond point at the engineblock to ground at battery?