I have a 95 crown vic crank no start

IF you are unfamiliar with what an *inertia switch* is - Suggest using Google search to find out what it does. Listed in the owners manual as > Fuel Pump Cut Off Switch .. Located inside the trunk - drivers side.

Yes I checked that after checking the spark plugs

I was just making sure - we see this quite a bit and most people are unaware of that switch .. That is the MOST common problem when this sort of thing occurs - in fact it’s probably 90% of the time! You’ll need to check for ignition spark - fuel pump operation and fuel pressure .. Suggest getting some *car savvy hands-on help* with it. Good luck!