Toliski Posted January 12, 2018 Report Share Posted January 12, 2018 Hello guys i have a 3sgte with cop and G4+ plug in. i have very noisy RPM signal, i am at stock harness. I know that i must change the crank/cam wires with shield one but i want to ask, at 3sgte the crank and cam sensors are in the distributor? Quote Link to comment Share on other sites More sharing options...
ClintBHP Posted January 13, 2018 Report Share Posted January 13, 2018 When you say must I rarely do and don’t seem to suffer. When you say noisey can you show us, is it always noisey or just when cranking,. Shielded twisted wire is best, the shield grounded at the ECU end only. Twisting cable helps reduce magnetic interference which is the most likely cause of noise. alao check all your earths have you played with the filtering and arming thresholds? Quote Link to comment Share on other sites More sharing options...
Toliski Posted January 13, 2018 Author Report Share Posted January 13, 2018 22 hours ago, ClintBHP said: When you say must I rarely do and don’t seem to suffer. When you say noisey can you show us, is it always noisey or just when cranking,. Shielded twisted wire is best, the shield grounded at the ECU end only. Twisting cable helps reduce magnetic interference which is the most likely cause of noise. alao check all your earths have you played with the filtering and arming thresholds? All my Rpm signla is like this one. Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 14, 2018 Report Share Posted January 14, 2018 This "noise" you have here is more likely just due to the poor trigger design. Your engine position signal is coming from within a distributor that is connected via a loose mechanical coupling to a camshaft which is then connected to the crankshaft via a "rubber" belt. So you have mechanical backlash, valve train resonance and cam belt resonance all contributing to an inaccurate engine position signal. Converting to a crank mounted trigger wheel is the proper fix. The "RPM filtering" setting under trigger setup may help a little. Quote Link to comment Share on other sites More sharing options...
Toliski Posted January 14, 2018 Author Report Share Posted January 14, 2018 6 hours ago, Adamw said: This "noise" you have here is more likely just due to the poor trigger design. Your engine position signal is coming from within a distributor that is connected via a loose mechanical coupling to a camshaft which is then connected to the crankshaft via a "rubber" belt. So you have mechanical backlash, valve train resonance and cam belt resonance all contributing to an inaccurate engine position signal. Converting to a crank mounted trigger wheel is the proper fix. The "RPM filtering" setting under trigger setup may help a little. Thanks Adam! I will try it! Quote Link to comment Share on other sites More sharing options...
Toliski Posted January 14, 2018 Author Report Share Posted January 14, 2018 I try the filter, and do the trick! Thanks guys!!! Quote Link to comment Share on other sites More sharing options...
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