Jordan B Posted July 2, 2017 Report Share Posted July 2, 2017 Hi im using a link atom G4+ on my 4 stroke 200cc turbo charged single cylinder motorcycle my local tuner has helped me with the base settings and ive got all the essentials like spark, fuel and fuel pump working and all the sensors but the issue is it runs momentarily and cuts as it does this the rpm limit fault shows and im getting rpm readings of 17000rpm can someone please point me in the right direction please Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 3, 2017 Report Share Posted July 3, 2017 Hi Jordan,It sounds very much like you are getting a trigger error. Unfortunately the Atom ecu doesnt have the triggerscope hardware so it makes it a little more difficult to diagnose. Does your tuner have an oscilloscope? What does the engine use for a trigger/s? Quote Link to comment Share on other sites More sharing options...
Jordan B Posted July 3, 2017 Author Report Share Posted July 3, 2017 Im using a 36-1 trigger wheel with a Ford ka two wire mag sensor can ive read that the sensors can be wired the wrong way would this cause my issue Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 3, 2017 Report Share Posted July 3, 2017 (edited) Yes reversed polarity can cause it. Also with a single cylinder the position of the gap will be quite important too. Preferably your "gap" will pass the sensor about 90deg before or after TDC. Do you know anyone with a "bigger" ecu like a storm or Xtreme that you can plug in to do a triggerscope? Edited July 3, 2017 by Adamw Quote Link to comment Share on other sites More sharing options...
Jordan B Posted July 3, 2017 Author Report Share Posted July 3, 2017 Arrr that could be the issue then ive set my sensor up wrong i think the gap is 90 degrees before tdc but it fires at tdc so i will move it tonight and see if it solves the issue cheers Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 3, 2017 Report Share Posted July 3, 2017 Arrr that could be the issue then ive set my sensor up wrong i think the gap is 90 degrees before tdc but it fires at tdc so i will move it tonight and see if it solves the issue cheers no, if your gap passes the sensor when the crank is at 90 btdc (piston approx half way up bore) that is ideal already. Quote Link to comment Share on other sites More sharing options...
Jordan B Posted July 4, 2017 Author Report Share Posted July 4, 2017 Gteat got the sensor in the correct position now and tried to start last night with no luck battery was at 9v would this cause a non starter Quote Link to comment Share on other sites More sharing options...
Simon Posted July 4, 2017 Report Share Posted July 4, 2017 It could well do as that is getting really low. You will have to reset your base timing to allow for the shifted sensor position. Quote Link to comment Share on other sites More sharing options...
Jordan B Posted July 5, 2017 Author Report Share Posted July 5, 2017 Got it started thanks for ur help guys Quote Link to comment Share on other sites More sharing options...
Jordan B Posted July 6, 2017 Author Report Share Posted July 6, 2017 Got it running but it wont idle happily with out alot of throttle and then dies what direction should i be looking in Quote Link to comment Share on other sites More sharing options...
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