#1 means the problem is with the injector on the front cylinder. Turn the ignition switch OFF. Check the injector coupler for loose or poor contacts. If OK, then measure the injector resistance. Disconnect the TP sensor/injector coupler and measure the resistance between lead wires. Injector resistance: 12 - 18 Ohms at 20°C (68°F) Yellow/Red to Gray/White If OK, then check the continuity between Y/R wire and ground. It should be infinite Ohms Y/R to Ground
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