My 2007 Nissan Altima won’t crank
So I had a misfiring issue and I scanned and saw it was the 3rd cylinder, so I replaced spark plug and checked the ignition coil everything was fine but still had the misfire so then I noticed the clip on the pigtail was broken and there was exposed wiring, in the midst of checking the 3rd and 4th cylinder pigtails my engine stopped cranking. More information I replaced the 3rd pigtail connector in hopes that was my issue but wasn’t, I did notice the triple 40 amp fuse block which housed the ignition, eco and unknown was pushed up so I’m guessing it’s a wiring issue related to the ignition and ecu. I have already checked the fuse block and it’s fine, and also the immobilizer is on because the symbol is solid when I try to start it. How should I go about diagnosing and fixing the issue ? Please help me this car has been sitting for a month and a half also I have tried to scan but it doesn’t let me