Need Help. I brought my 91 300zx to a mechanic to change the spark plugs and 1 injector that seemed like it wasnt firing and some seals and manifold gasket. Supposed to be a 5 hour job. he started work 9 am today and when he put it together he said it started but then stalled out and doesnt start, i wen down there and there isnt a spark to be found, he scratched the fenders, broke the cowl plastic piece and didnt install all the seal he said he would. Any ideas what the no spark problem can be? He wnet through the fuses but was so irritatted that im not sure if he knew what he was doing. Steve