SOURCE: Oxygen Sensor on '99 Isuzu Trooper
The O2 sensor is on the engine side (up stream) before the catalytic converter in the exhaust pipe, it is barrel shaped about the size of a jumbo magic marker.
SOURCE: IAT sensor
The intake air temperature sensor can be found in the air intake duct, or threaded into the intake manifold depending on which engine you have.
SOURCE: How do you replace turn signal bulb on 2001 Izuzu Trooper?
NOT SURE IF IT IS TRUE ON THIS KIND OF VEHICLE, BUT USUALLY WHEN CHANGING A BULB YOU NEED TO GO UNDER THE HOOD ON WHATEVER SIDE YOU ARE CHANGING...AND THERE WILL BE A KIND OF PLUG INTO THE BACK OF THE ACTUAL LIGHT FIXTURE, IF YOU GIVE IT LIKE A QUARTER TURN IT WILL PULL OUT YOU THEN CHANGE THE BULB AND PROCEED WITH PLUGGING BACK IN. MAYBE THIS WILL HELP!
SOURCE: 1989 IZUZU TOOPER NOT GETTING ANY FIRE
Need to have the Coil packs and the Ignition Control Module tested at someplace like auto-zone. I'm willing to bet thats your problem.
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