I recently overhauled the engine on my 1986 jeep comanche 2.5 tbi....I did a new timing chain kit and water pump and oil pump among other things....before I started all this the injector was fine but I put it back together (not all the way but enough to let it run) and it would turn over but wouldnt fire...I checked everything out and found no fuel coming from injector...does anyone know why the injector wouldn't even be spraying??