I have a 2002 chevy blazer crank no start replaced spark plugs and wires cap and rotor and distributor gear timed it top dead center but no start. Also I'm getting spark and fuel but it still doesn't fire doesn't even try to fire. I replaced the crankshaft positioning sensor and camshaft positioning sensor. I need someone's help ive set it to the timed markers but the piston isn't to the very top. It's right before it hits the top and goes back down. It just doesn't want to start. I replaced the sensors only because it through ransom misfire code