Question about 2000 Ford Expedition

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I need the spark plug diagram for a 2001 ford expy. or at lest steps on how to replace the plugs. I have a mis fire in cyl. 1 if anybody could help.

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  • Ford Master
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4 cylinder? 1342 is the firing order.just change them one at a time. Mark the tower #1 plug wire goes to.

Posted on Jun 21, 2009

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Need firing order diagram for 1995 f-150 6-cyl 4.9 litre


1-5-3-6-2-4 is the spark plug firing order for the 4.9 L ( 300 cubic inch ) straight 6

The distributor rotor turns CLOCKWISE

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Hope this helps

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Scanner said #4 cyl mis-fire changed #4 coil still reads #4 mis-fire any ideas


Replace the spark plug and if the problem still exsist replace the the ignition wire to the #4 cylinder.

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Replaced sparkplugs and sparkplug wires, now runs rough. I checked connections all tight. check firing orger, looks right. run good till I touched it. Help.


Check the firing order with the firing order diagram that I have uploaded, and if that does not solve the problem then remove the spark plugs and be certain that there is an even spark plug gap between all of the spark plugs, (see the emission label under the hood for the correct spark plug gap) and be certain that there is not any split-fire or multi-fire spark plugs installed in the engine, because those plugs will not work with an OBD-II system, and a random mis-fire is the least that they will cause if installed in an OBD-II controlled vehicle.


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Aug 18, 2010 | 2001 Ford Taurus

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Firing Order diagram for 2006 Ford Explorer


Hope this helps. The ignition coil:
  • changes low-voltage pulses from the PCM to high-voltage pulses.
  • fires 2 spark plugs simultaneously.
  • has 3 transformers.
    • One transformer fires the spark plugs for cylinders 1 and 5
    • One transformer fires the spark plugs for cylinders 2 and 6
    • One transformer fires the spark plugs for cylinders 3 and 4
Spark plug wires:
  • carry high-voltage pulses from the ignition coil to the spark plugs.
The spark plugs:
  • change high-voltage pulses to spark at the gap, which ignites the fuel and air mixture.
The firing order is 1-4-2-5-3-6.

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1 Answer

Engine misfires on #1 cyl. Code P0301. plug, fuel


Then the coil is bad. Even if the specs were ok, which they r not, the cracked case means its junk.

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I have a ford f150 that is mis firing on number


The most coomon thing is a coil. You cant really test without a scanner or way to test coil output. But you should replace the spark plugs and the #3 Ignition coil. Use MOTORCRAFT PLATINUM Spark Plugs only. Number 3 is the 3rd back on the Passenger side. Be sure there is no water/coolant on the spark plug well, if there is coolant, one of the heater hoses may be leaking. Take coils out, using a 7mm socket, be sure to blow out the spark plug hole with compressed air before removing the spark plug. Take the rubber boot off each coil and place some "silicone dielectric grease" in th ecavity for the coil end to keep out moisture. Cyls 1 2 3 4 on pass side, 5 6 7 8 on drivers side. After you are done, remove the positive battery cable for a few minutes to clear the memory and long term fuel trims.

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2001 ford taurus p0301 and p0303


You are mis fireing on cyl 1 and 3 if you replaced plugs and wires and coil this is going to be a fuel injector issue or valve issue. See if you can swap the injectors with known good cyl. and see if it changes. Or have a shop do a fuel injector service on it to see if it helps. It may be to late for the fuel injector service.

Mar 01, 2009 | 2001 Ford Taurus

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