I need some help, I have a 1990 GT 5.0. Mostly stock. Last 2 weeks have had issues with it cranking. Some days it will and others it will not. Drove it to get gas the other day. Cut it off to pump gas, It has never started again after that. Car will turn over great and I have spark at the plugs. Not a great spark but I do have spark. I replaced the PIP sensor and had the TFI testes at Advance 7 times passed each time. I used a NOID light on the injectors and I do not have a pulse going to the injectors. Fuel pump runs with switch on. what is the next area to look at and or test?