Question about Ford Expedition

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Looking for a diagram of a 4.6 L ford head. i need to see how the plug is inserted

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Remove ignition coil,then spark plug.

Posted on Sep 29, 2010


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Need engine diagram to replace spark plugs

The engines use what is called COP type ignition, or Coil On Plug. That means it does not have a distributor and plug wires like you are probably used to... each cylinder has its own ignition coil. If you can look at the injectors, you will see something about 1.5 inches around with a small bolt holding it in place, and a small wiring harness attached to it. These are the coils. The bolt has a 7 or 8 mm head on it. Remove the bolt and wire plug, and the coil will pull up and off of the spark plug. Depending on which cylinder you look at, it will be difficult to actually see the spark plug, but trust me it is down there about 4 inches deep into the head. They have a 5/8 head, and you will need about 1 3 inch extension for your ratchet to remove the plug. Be sure that your spark plug socket has the little rubber insert in there to. If you are going to replace them, a little tip for you.... lube the ceramic boot of the plug with dilectric grease before you insert it into the spark plug socket. This will keep the rubber piece from stickin to the plug after you install it. Also DO NOT OVER TIGHTEN THE PLUG !!!!! You will mess up your head and the repair is VERY expensive to fix. You can actually rip the threads right out of the head if you over tighten them. It is a bit of a pain to get all of them, but not too bad. I would plan a good 3 or 4 hours the first time you do it. On the passenger side, the back two are tough, but if you take off the brackets where the battery wires connect to (4 - 8mm bolts) and slide the two harneses off of the brackets, you can do it. Just push the heater hoses out of the way.

Jun 19, 2012 | 1999 Ford Expedition

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Need wiring diagram for spark plugs

Firing order for V6 is 1-4-2-5-3-6 If your standing in front of the car looking towards the windshield 1-2-3 are on the PASSENGER side and 4-5-6 are on the DRIVERS side front to back.

Firing order for V8 is 1-3-7-2-6-5-4-8...Again looking from the front 1-2-3-4 is on the PASSENGER side and 5-6-7-8 is on the DRIVERS side front to back.

Dec 23, 2010 | 1998 Ford Explorer

3 Answers

1999 ford escort I changed the plugs, but broke a plug cap. Bought a generic replacement spark plug wire that had to be modified to fit into the head. I cannot get the firing order correct. The car...

Remove the plugs from the head. Insert into the coil wires. Make sure they are properly earthed on the engine. Crank the motor and check for spark at each of the plugs.
Refer to the diagram. Cylinders are connected as shown on the diagram in blue. 1 goes to cylinder 1(sparkplug furthest from coil pack), 2 to 2, 3 to 3 and 4 to 4(closets to coil pack).
To test the coil pack use a digital volt meter. Measure resistance between coil towers for coil 1(marked 1 in red on diagram) Value should be between 12000 and 14500 ohm. Do the same for coil towers 2.
Measure resistance between I and C1. If the measurement is more than 5 ohm the coil is defective. Do the same for I to C2.
Measuring voltage at I(Ignition start/run) to ground should be 10V.
I is connected to the 15A engine fuse. The radio interference capacitor is connected between this line and earth at the coil. Disconnect it to see if it cures the problem.
C1 and C2 connect to the powertrain control module.
Bear in mind that aftermarket coil wires may cause problems with misfiring, so see if you cant find an OEM coil wire to replace the broken one before replacing anything else.


Nov 15, 2010 | 1989 Ford Escort

1 Answer

During a diagnostic test I was told cylinders 2 and 4 had pressure of 110 and 115. The others were at 140(6 cyl)I was told I needed a head gasket to solve the problem.My 2003 ranger seems to be running...


Jan 10, 2010 | Ford F-150 Cars & Trucks

1 Answer

Need wiring diagram for 1990 ford f-250 4x4 diesel. the glow plug system

If you are looking for a complete wiring harness diagram then faxonautoliterature has the original Ford service manual for your truck which has complete diagrams in it. If you are looking for components to check then Haynes Diesel Engine Repair Manual, part # 10330 has good diagrams of components and terminals pinpointed for testing purposes as well as the specs for those tests and a good diagnostic section. Hope this helps.

Oct 18, 2009 | 1990 Ford F250

1 Answer

1998 ford 4 cyl. 2.0 over drive over head cam timing diagram looking for the timing diagram

There are no marks on this motor. To do the install it requires the special tools to lock the camshafts in place (requires valve cover removed) and crankshaft in place for the install.

Jun 07, 2009 | 1998 Ford Contour

1 Answer


Do you mean plug wires? there is a diagram on the front of your truck near the radiator that tells your fireing order you read it counter clock wise and your spark plug numbers is from front looking to the back left side #1 #2 #3and #4 right side is #5 #6 #7 And #8 is your motor a 5.0 v-8?

Mar 21, 2009 | 1989 Ford F 150

1 Answer

Vacuum diagram 94 ford escort lx

check the vacuum diagram located under the hood this should rovide you with what you need.

Dec 19, 2008 | 1996 Ford Escort 4 Door

1 Answer


i am looking for a diagram for 1996 ford f-150 for the spark plugs.

Jul 31, 2008 | 1996 Ford F150 Regular Cab

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