Truck was running just fine, I back out of my drive way go to put it in drive and it just dies. Tried and tried to start it, but it just turns over and wont catch and fire. Thought it was the ignition coil. Replaced that but it still won't start. It's getting fuel and spark and fuses are all ok. I'm at a loss. My dad said it could be the timing chain slipped but I'm not hearing any unusual noises. Everything sounds normal. Any help will definitely be appreciated. Thanks

 

what vehicle? you have spark at every cylinder? fuel pressure and volume?