Phil2JZ Posted September 11, 2022 Report Share Posted September 11, 2022 Hey legends, Ive got a roadblock on getting my engine started after upgrading from the G4+ FURY to G4X FURY. 2JZGTE VVTI was running great on the g4+ prior to swap. I've transferred everything over and adjusted all parameters to suit etc. Ive thoroughly been through everything but just cant find the issue. I have narrowed it down to potentially an ignition coil Dwell timing issue. The dwell settings look good, but when i crank the engine over, it reads zero dwell and when i stop cranking the engine but with ignition "on" the dwell reads 3-4ms. It seems to me to be transposed with its activation. "On when it should be off" and "off when it should be on" . Could this be a battery low voltage when cranking issue. Causing havoc. Or a trigger issue? The fuel side of it looks and works great, fuel pump and injectors tested and activated with fuel pressure inputs. Ive attached a trigger scope and feel like its working correctly Ive attached my tune also to see if any settings are off Also attached a couple of Runtime value photos when cranking engine. Shows i have no fuel or ign "cuts" or engine kill. Trigger signals = "on" TriggerScopeLog 0.8.llgx https://www.dropbox.com/t/HNA0epOJoTvIvYPf https://www.dropbox.com/t/VnwE2XyOtTWM7NM4 Quote Link to comment Share on other sites More sharing options...
aerace_fab Posted September 11, 2022 Report Share Posted September 11, 2022 6.5 volts at cranking, do you have another battery you can use? Quote Link to comment Share on other sites More sharing options...
Phil2JZ Posted September 11, 2022 Author Report Share Posted September 11, 2022 https://www.dropbox.com/s/b162fx1n7q6bysk/Photo 11-9-2022%2C 11 02 16 am.jpg?dl=0 Yea it’s struggling, I do keep it on charge up to when I need it. then remove to crank over engine. I did have issues when I would leave the previous setup for more than a couple of days. But if I had the charger on, it would start after a few cranks. if its highly likely the issue, I can pick up a new one. How does every else look? Quote Link to comment Share on other sites More sharing options...
Phil2JZ Posted September 11, 2022 Author Report Share Posted September 11, 2022 Just put a new battery in, sounds much better cranking and hold voltage better now. only drops to 9.5v at cranking. link to show log of the new battery cranking https://www.dropbox.com/t/w1ERzX30J8qatRUC still no start Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 11, 2022 Report Share Posted September 11, 2022 Fuel table doesnt look right to me. You have MGP on the Y axis but it only goes down to 10Kpa at the lowest (this is positive pressure boost) - it should go down to something more like -80kpa. And in the cell it is operating in during cranking you only have a VE value of 7%, usalyy in modelled mode you wouldnt have VE numbers much below about 50% - and in the cranking area it would be more like 80%. I also think your trigger offset is wrong - Im pretty sure it will be close to zero in G4X - check your base timing. Quote Link to comment Share on other sites More sharing options...
Phil2JZ Posted September 13, 2022 Author Report Share Posted September 13, 2022 Ahhhhhh thankyou mate! Sorry about that, it was ment to be MAP on the Y axis Also changed my offset to '0' to get it started. Wasnt too far off with the timing light. Runs rough but ill go through everything and get it dialled in. Quote Link to comment Share on other sites More sharing options...
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