Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
I have a 2004 Ford F-250 super duty 6L
it had long cranking after the it got warm. I replaced the icp and the crankshaft sensor. It then would not start at all, and it showed a fault for all injectors having low voltage, I checked the cam/ crank signals to the pcm and I believe they were good ( 2wire sensors) replaced the fuel injector module and still no start. I belive I was getting all the correct voltages to the fuel module but it is telling me on the scanner that the fuel injector control module is not synced. I have a fault for the module not compatible but I read that it’s conman with using a different module rather than the original.