SOUNDS LIKE THE IDLE AIR VALV IS NOT WORKING PROPERLY IT IS LOCATED ON TOP OF THE ENGINE AIR INTAKE AND ONLY HAS TWO 10 MM SCREWS THAT ATTACH IT AND A 2 WIRE PLUG THAT OPERATES IT THIS IS A VERY COMMON PROBLEM WITH THESE ENGINES AND THE FIX IS RELATIVELY CHEAP AS WELL THIS VALVE CAN BE PURCHASED AT MOST ANY AUTO PARTS STORE FOR AROUND 30 TO 50 DOLLARS .. TRY THIS FIRST AND I HOPE IT HELPS
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you have probably been misinformed. The needle on the temperature gauge is controlled by the temperature SENDER unit ( not the temperature SENSOR unit) The sender unit is a single wire unit that is a resistance unit affected by heat of the coolant, The hotter the coolant the less resistance the higher the reading
The temperature sensor unit is a 2 wire unit that tells the ECM when to switch on the fan, when to go into limp mode if overheating and when to adjust the air/fuel mixture as the coolant warms up
Take off the doghouse. there is a soft rubber tube that commonly fails, causint the engine to run very poorly. It has a 90 degree bend, and the hole usually occurs on the outer surface of the 90. It will be visually detectable.
check for a vaccum leak. you can use carb cleaner around the side of the carb and around vaccum lines. if it lowers the idle or kills it `its a vaccum issue easily fixed. could also be low quality fule try running a carb/ fuel injector cleaner through your fuel. if none of these work then id goto a more expensive solution.
If the engine is getting warm, then you have one of 2 problems. First is a warm/cold air door motor located under the dash. Second would be a clogged heater core that would need flushed. If your motor is not getting warm then you need to replace your thermostat.
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check engine coolant temperature when it gets warmer, or at operating temperature, and verify that the temperature gauge is showing warmed up to operating temperature. If the coolant temperature sensor tells the computer the engine is cold it will over fuel and miss and the engine will die. When cooled down it will run fine until it warms up. Also could be coil if it starts missing after warmed up.