Hello everybody!
I just purchased a 350Z G4+ for my car. It is a 2003 with Plenum spacer, High Flow Cats and Nvidia Gemini exhaust. I've installed the G4+ and I am trying to start to tune this baby and I am questioning if I am doing it right, which I am probably not. But here are some observations/questions that I've made.
1. TPS (sub)
Is it me or the sub channel of the TPS is reversed ? This is coming from a automatic calibration. Under the OEM Ecu, both channels are 0V closed, 5V open.
2. On a former log using the OEM ecu, nissan is holding the idle rpm using 15% TP throttle. The basemap of the 350z shows a TP position of 2.5% only. This makes the engine iddling lean as the oem injector don't put barely any fuel and I need to really increase the amount of fuel. What I do see is that the OEM is using retard timing to keep the idle speed but the G4+ only uses the TB.
3. Talking about timing, I had to advance my trigger offset by 6deg in order to match the 10deg timing mark on my crank pulley. Is that normal ? It seems to me that either the 6deg of retarded timing could be a safeguard to "hurry up" tuners.
4. dwell time. When measuring the timing, I actually used a spark lead and use that lead as inductive source. This way , I was able to measure the timing "including" the dwell time of the coils. Now because I saw a 3ms dwell time, I dig into the ignition dwell table and noticed the dwell time differs from changes in RPM. Isn't dwell time just the time it takes for the ignitor to spark ? why would rpm changes that ? help me understand please.
5. I have installed a Innovate LC2 coupled to a LSU4.9 wideband on the bank 2 only. My AFR reading are very inconsistant at TP% below 10%. Is that normal for this sensor. Does it requires a minimum exhaust flow to become accurate ?
6. Torque management. The 350Z is based on the G4+ extreme. Can I later work this feature to work on a manual or is this only for automatic where the Trans TCM do the request. I am thinking about doing some kind of rev-matching later on. Yeah! I know , I am far away from it now.
EDIT: 7. I have a twin VVT engine. Both Basemaps included shows Inlet and Exhaust activated. Should I keep it this way ? or deactivate all exhaust VVT signals ?
Thank you.
I really like the software, It is easy to understand for a very beginner like me. Also thank you for the wiring and setup help. This enabled me to install it all by myself ( yes, I am proud of it)
Francois
