| The injector driver ICs in the ECU fail which can cause one or more injectors to stop working. I've repaired them before. If you can borrow an ECU to test with and find it's the ECU I can fix it. Let me know. BTW, a bad CAS will not cause just one injector to stop working. Oh, and you can use an NA ECU to test with too. Just put the key in the ON position and turn the CAS shaft by hand and listen for the click at the injector.
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