2000 V6 Isuzu Rodeo Won't Stsrt. No Fuel No Spark

I have a 1999 isuzu rodeo with a 2000 model v6 installed. The vehicle started to over heat from a coolant leak and shut off. Got the vehicle home and repaired the leak. Now it won't start. The engine turns over but no start I've checked and replaced the fuel pump and crank sensor. Still no start. I checked for spark with a spark tester found no spark. And I checked the injector with a noid light no injector pulse present. I replaced the ecu and still no start. I'm out of ideas please help