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check the air filter if dirty "it would have to be terrible" it would cause less oxygen to your fuel mixture wich will run lean.if it has carb you can adjust it if fuel injected or throttle body could even be computer if its a 96' or above you can take to auto zone they will hook it to a computer and pin point your problem.
In your situation I would check the Mass Airflow Sensor ( read in your manual each vehicle is different ). Then test your Fuel Pressure Regulator by unplugging the vacuum line to it; if there's fuel in it it's faulty. Then test to see if the fuel injectors are clogged or not providing enough fuel.

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13y ago

What else can I help you with?