koo Posted July 4, 2013 Report Share Posted July 4, 2013 Just wondering if a Ngk B8efs plug will play havoc with the ecu signals? As they are a non resistor plug. Quote Link to comment Share on other sites More sharing options...
Simon Posted July 4, 2013 Report Share Posted July 4, 2013 If you are running wasted spark I would avoid at all costs as resistive plugs must be used in a wasted application. However if its coil on plug or distributor then there is a very good chance they will be fine. Often it can be an issue for PC connection but the running of the engine is unaffected. Quote Link to comment Share on other sites More sharing options...
koo Posted September 30, 2014 Author Report Share Posted September 30, 2014 We have coil on plug but the CDI is wired in wasted configuration as the CDI provided only had 4 outputs. Would have rathered 6 outputs as it is a 6.. but using what was given. Still no good? Have some resister plugs but they are the big size and hard to get a socket around. Quote Link to comment Share on other sites More sharing options...
Dave Kriedeman Posted September 30, 2014 Report Share Posted September 30, 2014 Hi Koo, long time no see. In all honesty it is the luck of the draw with this issue. I have lots of cars running ViPEC ECU'S with CDI's and wasted spark running NON resistive sparkplugs without comms issues, dropping off line etc. I think out of all the cars I have done , there is only two I have to remove the non resistive plugs and fit resistor plugs to stay online with the ecu when doing tuning changes. If you twist the positive and negative wires from the CDI UNIT to the coils it does reduce noise and keep the CDI output wires as far away as possible from the ECU and it's wiring. Regards Dave Quote Link to comment Share on other sites More sharing options...
koo Posted October 4, 2014 Author Report Share Posted October 4, 2014 Thanks so much for your input Dave. Its a lonely world out there with regards to tuning lol... A lot of people don't like sharing. I have some -8s and -9s in both plug types. Will try em out. Cheers :-) Quote Link to comment Share on other sites More sharing options...
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