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There are several possibilities for this problem. A "cold start" sequence is suppose to activate based on water temperature and the signal from the water temperature sensor. This makes the fuel rich and adjusts timing to make the engine run better when cold. It works like a choke only it is electronic.
There may be 2 sensors with one making the dash gauges work and the other doing the engine controls. If not 2, then 1 sensor would do the whole job.
Another possibility is an air leak in the fuel system which makes the system bleed dry overnight. It is far less common on gas engines but happens a lot on diesels.
Some earlier Ford engines from 1984 to I don't know when they stopped on trucks, would use a step-up solenoid on the accelerator bracket that worked off water temperature. Sometimes a bad water thermostat would make the temperature controls malfunction the other way (High idle, clicking, low idle) that would stall and engine as the temperature vary.
it sounds like there is no fuel getting to intake.
when you step down on accelerator, it is designed to squirt a shot of fuel into the intake, which would keep it running for a few seconds. same as pouring gas down intake.
you never stated if you had carburation or injection system, in either case no fuel is getting through on its own.
which could be a variety of problems depending on which system you had.
Mike will it not start if you just lightly press the gas padle.? I mean does the key turns on the engine? If not the car needs a tune up - adjustments.
Sounds like it is not getting fuel or air? Check your air filter and clean it out. Possibly remove it completely to see if this helps keep your vehicle runing the next time you test it. Check your fuel filter. It sounds like it cannot get enough gas to keep it running. Try cleaning your fuel lines with something similar to gum out. You add it to your gas tank when it is on empty and then add a certain amount of gallons of gas as indicated on the can to complete the clean out process. I would recommend cleaning at least twice.
you might check the cable that runs to the air box that runs from the gas peddle to the air box. see if it is bent or something obstructing the movement of the arm on the airbox the thing that use to be a carburetor or older vehicles
Are you sure your idle ports ( size of pinhole) in carb aren't plugged with something? What happens if it starts to die, and you give it a quick squirt of WD-40 , down throat of carb?
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