Engine details:
- 408 stroker
- some custom cam
- twin 90 mm TB?s with external controller for E38 PCM
- twin superchargers
- air-water-air intercooler
- 1050 cc injectors (Bosch-based I think)
- external twin-pump fuel system next to the engine (single pump for non-boost regions, second for boost)
- base pressure either 40 psi or 58 psi, boost/vacuum referenced
- stock fuel pump, acts as a transfer pump, return line from twin-pump system back to the rear tank
Problems:
Without 2 bar COS, I couldn?t get MAF to fail. So I switched to 2 bar COS. Now with it, VE numbers are abnormally high. Small part of it was that I was running only 40 psi of base fuel pressure. Now it is 58 psi or so.
Also, Cylinder Airmass is very high at idle. MAP sensor settings are a bit off, but even if I fix that, I doubt it will help much.
After succesful start and stop, when I?ll try to start again, it won?t. It?s like fueling has changed dramatically. This may be related to the stock fuel pressure sensor which does not see any useful amout of pressure, since external fuel system has return line back to the tank in the rear of the car.
I?ve tried to disable things that could alter fueling that are related to the stock fuel pressure sensor, but I think I haven?t succeed to do so.
I also think at least one of the plugs in the right side is not ok. I will replace all plugs as soon as car starts consistently. Now it does not.
Stock tune: 01 camaro stock settings.hpt
Modified tune: 125 muutetaan spark taulua.hpt
Log when car runs: 113 runs now high cylair.hpl
Log with next start: 114 does not start.hpl