Can't figure this one out. I've posted over on TT to see what Eric might be able to come up with.
Issue: On cold start up only, car will fire and then immediately die. On second try, car will fire and basically stumble to life. Car runs absolutely tip-top after that even at WOT @25-26psi. No smoke or signs of fuel/oil/coolant leaking into cylinders. Car starts perfectly when warm.
Background: I've tried everything I can think of and have several backup parts to which I've narrowed out possibilities by swapping known good parts and/or readjusting existing parts. I've eliminated coil pack, module, plugs, plug wires, injectors, fuel regulator, fuel pump, fuel filter, grounds, battery, battery cables, IAC motor, TPS, MAF, alternator, starter, cam sensor cap/adjustment, crank sensor, compression, ECM, fuses, bulkhead/fuse panel connections, fuseable links, and coolant loss/leak in to cylinders. This has been ongoing for about a year now and started shortly after I shipped the car here to Hawaii. It did not appear after doing work on the car or anything like that. I replaced the entire wiring harness with a Casper's plug and play unit about three years ago with no issues.
Additional info: The embedded video corresponds to the attached log taken at the same time. I notice that the cranking volts are very low, even considering the ~1V lower reading usually seen at the Scanmaster/Powerlogger, and this may be the root of the problem. Also, there's a complete dropout of all readings between the two attempted cranks at frame #449. A/F ratio seems extremely rich, even taking into consideration the cold start fueling but not sure if this is normal. From frames 5132-5153, car goes into closed loop for no apparent reason...again, not sure if that's normal either.
Issue: On cold start up only, car will fire and then immediately die. On second try, car will fire and basically stumble to life. Car runs absolutely tip-top after that even at WOT @25-26psi. No smoke or signs of fuel/oil/coolant leaking into cylinders. Car starts perfectly when warm.
Background: I've tried everything I can think of and have several backup parts to which I've narrowed out possibilities by swapping known good parts and/or readjusting existing parts. I've eliminated coil pack, module, plugs, plug wires, injectors, fuel regulator, fuel pump, fuel filter, grounds, battery, battery cables, IAC motor, TPS, MAF, alternator, starter, cam sensor cap/adjustment, crank sensor, compression, ECM, fuses, bulkhead/fuse panel connections, fuseable links, and coolant loss/leak in to cylinders. This has been ongoing for about a year now and started shortly after I shipped the car here to Hawaii. It did not appear after doing work on the car or anything like that. I replaced the entire wiring harness with a Casper's plug and play unit about three years ago with no issues.
Additional info: The embedded video corresponds to the attached log taken at the same time. I notice that the cranking volts are very low, even considering the ~1V lower reading usually seen at the Scanmaster/Powerlogger, and this may be the root of the problem. Also, there's a complete dropout of all readings between the two attempted cranks at frame #449. A/F ratio seems extremely rich, even taking into consideration the cold start fueling but not sure if this is normal. From frames 5132-5153, car goes into closed loop for no apparent reason...again, not sure if that's normal either.