I have been having this issue for a while now. The car is a 1992 Toyota Supra JZA70 . The car had issues with the Hydro Fan Setup and I had to switch over to a Clutch Fan. Before I did the conversion , the car ran fine , turned over fine , never had issues but sat for a while before the conversion. After the conversion took place , the car had issues starting , it would crank but wouldn't start. I was able to get it to start using two paper clips and bypassing the "Now Failing" Fuel Pump , and it would start. Went ahead and replaced the Fuel Pump with a New Walbro 255 pump , replaced the coilpacks with 2JZ oem coilpacks and it ran okay. The issue had changed from a bogging issue while it ran to an issue upon start up. When the car was warm , it would crank over just fine but when it sat overnight or the engine was cold , it would struggle to turn on. I changed the spark plugs , ECT Sensor , looked at the ECU and it seemed fine , but now it's doing the same thing but just cranking , not turning over. What could be the issue !?!?!? I'm hopeless !!!