A buddy of mine a similar problem when he engine refused to start. My mechanic told me to check and see if the injectors where firing right, if they weren't it could be a sign the ecu went bad, and for him it did. To see if the ecu is working right pull one of the injector connectors from the electrical harness off and attach a noid light or a 12v light bulb to close the circuit. Then have a buddy turn the engine over. If the ecu is working right the light should turn on for a split second every time the ecu tells the injector to fire. If it stays on or doesnÆt turn on at all then you might have a problem. Hope this helps.