Where is the #1 coil and how do I get to it? - E-250 Ford Cars & Trucks

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no fuse for coil if no power to coil[s] assuming its the ignition coils sheck and test wiring and coil for damage or failure

No cylinders fire at same time. 6 & 3 must be from same coil-ignition coil C-that is the one with the problem. And the secondary circuit- that is the spark firing portion of the coil. Coils have a primary winding circuit and a secondary wire winding circuit. The secondary comes out of coil as the tower, or the spark plug wire tower -the business end of the coil leading to the plug.

You could have a bad new coil (happens occasionally) or the connection to that coil may be the problem-the connection where the coil snaps onto the coil pack assembly. Try swapping that coil (coil C) with another one there and see if problem follows the coil. See? Keep your plug wires the same, just swap coils with another and see if the new position for suspect coil causes other cylinders to misfire. If a different coil in that "C" position causes same code, then it is not the coil itself, but probably the base assembly that the coil connects to.

These ignition systems use what is called a waste spark, or exhaust waste spark system. The coil will send spark to 6 & 3 simultaneously, but since one is always on the exhaust stroke while the other is on the compression (firing) stroke, the exhaust spark is very weak, and all the energy from coil is directed to the compression stroke cylinder. It sounds crazy but it works great.

Since you say it runs bad just as before, that indicates the coil is not the problem, but something wrong with the base of the coil pack . This is where the wiring is directed to the coils.

Disconnect the ignition coil output wire at the distributor cap.
Connect a spark plug to the end of the ignition coil output wire which you just disconnected.
Connect a ground wire to the threaded portion of the spark plug.
Disconnect the ignition coil ground wire from the negative terminal on the coil (Green Wire).
Connect one end of a ground wire to the ignition coil negative terminal.
Turn the ignition switch to the ON position.
Tap the other end of the ignition coil ground wire jumper on an good grounding point (for example the battery negative terminal) and look for sparks at the spark plug that correspond to the frequency of your tapping of the ground wire.
If you have a good spark at the spark plug, the ignition coil is good.
If you don't get a good spark, check for approximately 12 VDC from the coil positive terminal (black wire) to ground with the ignition switch in the ON position. You should also get approximately 12 VDC from the coil negative terminal (Green wire) to ground
Ignition Coil Resistance Check

In addition to the test above, you may elect to perform an ignition coil resistance check as confirmation of the coil's condition.

Check the ignition coil primary coil resistance by connecting an ohmmeter between the positive (Black wire) and negative (Green wire) terminals on the coil. The resistance should be 0.4 to 0.6 ohms.
Check the ignition coil secondary coil resistance by connecting an ohmmeter between the coil output terminal and the ignition coil negative terminal. The resistance should be 5000 to 7200 ohms.

You may have a bad coil or bad ground or wire connection

To Remove......
1. Remove the spark plug wire from the ignition coil.
2. Disconnect the ignition coil electrical connector.
3. Remove ignition coil bolts.
4. Remove ignition coil.

To Install.....
1. Install ignition coil.
2. Install ignition coil bolts.
3. Tighten ignition coil bolts to 8 Nm the same as 71 inch pounds.
4. Connect ignition coil electrical connector.
5. And finally, install spark plug wire to ignition coil.

Hi.

Ignition coil terminal 1 --> UCE Bosch ME2.0 (terminal 21(coil 1) ,16(coil 2), 7(coil 3) ,14(coil 4), 4(coil 5), 18(coil 6))

Ignition coil terminal 2 --> Fuses and Relays Module X61 (terminal 34)

Ignition coil terminal 3 --> UCE Bosch ME2.0 (terminal 20(coil 1) ,17(coil 2), 6(coil 3) ,13(coil 4), 5(coil 5), 19(coil 6))

Hope i helped.

GM Full-Size Trucks 1988-1998 Repair Information
Ignition Coil - REMOVAL & INSTALLATION
(sSee Figures 1, 2 and 3)



Fig. 1: Ignition coil mounting-4.3L engines

1. Tag and unplug the wiring connectors from the coil and the coil wire.
2. Unfasten the retainers securing the coil bracket and coil to the manifold.
3. Remove the coil and bracket and drill out the two rivets securing the coil to the bracket.
4. Remove the coil from the bracket.
   

To install:
The replacement coil kit may come with the two screws to attach the coil to the bracket. If not, you must supply your own screws.



Fig. 2: Ignition coil mounting-5.0 and 5.7L engines



Fig. 3: Ignition coil mounting-7.4L engines

1. Fasten the coil to the bracket using two screws.
2. Fasten the coil and bracket to the manifold. Tighten the retainers until they are snug.
3. Engage the coil wire and the wiring connectors to the coil.

Hope this help to solve it (remember comment and rated this).

Coil "D" should be Cylinder #4
Coil "A" = Cylinder #1
Coil "B" = Cylinder #2
Coil "C" = Cylinder #3.
Coil "D" = Cylinder #4
Coil "E" = Cylinder #5
Coil "F" = Cylinder #6
Coil "G" = Cylinder #7
Coil "H" = Cylinder #8

Firing Order for 6.0L
1-8-7-2-6-5-4-3
Cylinders:
(back of vehicle)
8----------7
6----------5
4----------3
2----------1
Ignition Coils are adjacent to the corresponding Cylinder

Let me know if this helped.

Check the coil wire from coil to distributor cap.

REMOVAL & INSTALLATION

See Figures 1, 2 and 3


Fig. Fig. 1: Ignition coil mounting-4.3L engines

1. Tag and unplug the wiring connectors from the coil and the coil wire.
2. Unfasten the retainers securing the coil bracket and coil to the manifold.
3. Remove the coil and bracket and drill out the two rivets securing the coil to the bracket.
4. Remove the coil from the bracket.

To install:
The replacement coil kit may come with the two screws to attach the coil to the bracket. If not, you must supply your own screws.


Fig. Fig. 2: Ignition coil mounting-5.0 and 5.7L engines


Fig. Fig. 3: Ignition coil mounting-7.4L engines

1. Fasten the coil to the bracket using two screws.
2. Fasten the coil and bracket to the manifold. Tighten the retainers until they are snug.
3. Engage the coil wire and the wiring connectors to the coil.

Hope this helps
Lefty64