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Got the same issue here as well. It means that you have a misfire in #4 cylinder. Most likely it is the plug and coil in the #4 position due to leaking coolant from the heater core. Check to see if there is indeed coolant, if so when you change out the coil and plug you will want to replace the hose clamp just above the plug with a "screw to tighten" one.
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2001 ford explorer sport diagnostic codes P0304?
the code p0304 is cylinder 4 misfire detected
Dodge caravan 2001 eng code p0304?
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Trouble code P1507 means: Idle air control (IAC) underspeed error
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light sensor
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There is a electrical short somewhere...
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Speed sensor on a 2001 ford expedition
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The 2001 Ford Expedition has 16 valves.
What type of freon do you put in a 2001 Ford Expedition?
r134a for a 2001 Ford Expedition
What size engine does the 2001 Ford Expedition have?
The 2001 Ford Expedition has a V8 engine.
Is the 2001 Ford Expedition electric or gas?
The 2001 Ford Expedition is a gas-powered vehicle.
What kind of transmission does the 2001 Ford Expedition have?
The 2001 Ford Expedition has a 4-speed automatic.
