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94 ford explorer idles fine replaced TPS wires plugs checked all sensors but when i put it in gear it will not take throttle like it runs out of gas but when i release throttle it will return to an idle
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Check all vacuum hoses for, first of all, that they are there, and then that they have not been chewed by mice or squirrels (that happens), or rotted away (that happens too).
Check the coil pack(s) for corrosion at spark plug terminals, check plug wires--at night, the darker the better, raise hood with engine running; blue sparks or lightning jumping around the wires and plugs means your wires are dead--check plugs for fouling or tip wear, if your car has over 100,000 miles check catalytic converter and fuel filter, and check the TPS. The throttle position sensor monitors where the gas pedal is, and since most of the time, it is at the place that makes the car go 55, or idle, the TPS can get worn in those positions and send false signals to the PCM. Fords of that vintage also used a pulsed air feeder that can cause rough idle and is very difficult to service.
Best bet is vacuum leak first, then spark, then fuel, then the out-there stuff.
There are several problems and they are all related. Check plugs if they a white with gray ash buildup. Gap .054
1. Fuel pressure regulator, if it is ruptured fuel will be vacuumed straight into the the intake causing idle surge also in causes temperature fluctuation and poor performance. It will also cause lean running condition. 2. The Mass Airflow Sensor also has a huge impact on mixture, defective symptom was a knocking and clattering under load especially uphill. Cleaning will only give temporary fix. 3. Spark Plugs- Do not use Platinum plugs they run hotter than standard plugs! 4. Any intermittent starting problems are likely fuel pump related, when you turn the key in the ignition you should hear the pump running!! 5. Preventive maintenance is the key change your fuel filter at recommended intervals.
I have a 94 Explorer, it run very poorly after changing these items it runs great, restored power, idles great and great mileage again and finally no more temperature fluctuation.
what code are you getting when you check the obd2 computer usually the problem when an ford engine runs ruff check the tps sensor which is on the side of the throttle body opposite of the throttle cables tps stands for (throttle possitioning sensor)
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