Dynodom Posted April 14, 2019 Report Share Posted April 14, 2019 Hello I am getting random engine speed spikes. The trigger wheel is the Link 24 teeth and the sensor is also from link. I have taken all precautions when wiring to have a reasonable distance between the high tension ignition wires and the ECU loom. I have attached the log. Can you help ? ATOM2 MSD CDI ignition Lotus Cortina, Distributor synch Atom-DBA-Lotus-Cortina-Random-RPM-Spikes.llg Quote Link to comment Share on other sites More sharing options...
Steve Posted April 14, 2019 Report Share Posted April 14, 2019 Do a triggerscope capture Quote Link to comment Share on other sites More sharing options...
Simon Posted April 15, 2019 Report Share Posted April 15, 2019 A image of the trigger signals will be the go. As you have the Atom you don't get the onboard trigger scope so will have to use an external scope or a higher spec ECU to do it Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 15, 2019 Report Share Posted April 15, 2019 3 hours ago, Steve said: Do a triggerscope capture Unfortunately there is no trigger scope in the Atom. Dom, since the errors happen at low load (low ignition energy) I think I would be leaning more towards a waveform problem rather than an ignition noise problem initially. Maybe the cam tooth is crossing over one of the crank teeth or one of the sensors is wired incorrect polarity. Do you have a 2 channel scope that could capture the crank and cam signals? Quote Link to comment Share on other sites More sharing options...
bsh Posted April 16, 2019 Report Share Posted April 16, 2019 Are you using spark plugs with resistor? If not, you should... Quote Link to comment Share on other sites More sharing options...
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