One of my first projects I was changing the cam and intake system on my 81 f100. put every thing together and the truck wouldent start. this problem drove me nuts. Turned out I made a rookie mistake of working on it with the battery hooked up and melted the fusable link. it looks like a regular wire and I dident solve it the guy i sold it to did. I still kick myself especially since I put all the time and effort then sold it after just giving up (another life lesson). I dont know where the fusible link is on your ride or if this is even the problem, but examine every possible problem no matter how remote. Good luck.