ecu ?? do the noid light test. the computers go bad on these all the time.I fought with this problem a few times if you know anyone that would let you borrow one for testing. or go buy a noid light test kit at harbor freight,they are cheap.its a kit with a bunch of test lights in it, they plug in to your harness where the injector plugs in. you turn the motor over and they will flash every time the ecu pulses the injector.if it does not blink your ecu is bad. if it stays on constant your ecu is bad. test every one. you can borrow mine but I live in spring hill.I think I paid less than 20 bucks for the kit