Brad May Posted June 10, 2018 Report Share Posted June 10, 2018 Hi guys, sorry no log yet, but just seeing if this rings a bell with anyone. Atom on LS1 semi sequential and waste spark. At cruise anywhere from 70-100km it will often cut fuel or spark for a second or three then come back on back to normal. The car is an auto, so its not cutting to stall the engine as it comes back in,but allows no throttle input during it and afrs go full lean. Can do it 3 times in 1 minute, then not at all for ten mins, and can be at different revs each time. Fuel press remains constant. Quote Link to comment Share on other sites More sharing options...
motomattx Posted June 10, 2018 Report Share Posted June 10, 2018 Sounds like a loss of crank signal. Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 11, 2018 Report Share Posted June 11, 2018 Probably too many possibilities to hazard a guess here, Try setting up ECU logging so it is recording a few common parameters at all times and you might capture it. Does the tacho drop to zero when it cuts out? Quote Link to comment Share on other sites More sharing options...
Brad May Posted June 11, 2018 Author Report Share Posted June 11, 2018 thats one thing i forgot to monitor but im fairly sure it stayed up, i guess if it zeros it possibly is a crank signal. I also checked my fuel cut overrun, its a new tps, but even calibrated reads a low % at cruise so i wondered if it is activating fuel cut Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 11, 2018 Report Share Posted June 11, 2018 You can easily turn off overrun fuel cut as a test. Quote Link to comment Share on other sites More sharing options...
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