Question about Ford F-150

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Spark Plug Wire Sequence

I am changing the spark plug wires on an 84 Ford F-150 4.9L 6 cylinder. At some point I got my wires crossed and now don't know what what order I'm in. I know what the firing order is, but I don't know what # each terminal on my distributor is.

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  • mdbaysinger Jul 03, 2009

    Thank you so much for your very clear description. My book was off by one terminal (or the distributor was off). Your explanation was dead on and the truck fired right up. Thanks again. I'll look for you again I'm sure, as this is a project truck and I'm always doing something to it.

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  • Ford Master
  • 3,854 Answers

Your firing order is 1-5-3-6-2-4 and your #1 is the cap terminal the 3 O'clock from the front so that would be the one towards the driver's fender and the rotor rotates clock wise. So the next post would go to the #5 cylinder. Hope this helps friend. Keep me posted, be glad to help you get your truck running 100%.

Posted on Jul 03, 2009

  • Harvey N Tawatao
    Harvey N Tawatao Jul 03, 2009

    Glad to have mad a new friend, be safe and keep up eh great work. 

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Blinking Check Engine Light / Rough Idle


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You may have got the spark plug wires out of sequence.
Reseat the coil wire going to the center of the distributor cap Check the spark plug wires at the distributor against the firing order as follows:
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I took of*** my spark plug wires working on my small block 350 pickup and I don't remember the the firing order to put the new wires back on. Is there a diagram anywhere or is it even that difficult to...


Next time number each lead before you remove it and no. the dissy cap as well

The firing order, which should be cast into the intake manifold, for the chevy small block V8 is 1-8-4-3-6-5-7-2. The firing order is the numerical sequence in which the spark plugs are fired. The insertion position of each spark plug wire around the circumference of the distributor cap can be found according to a clock face. The insertion sequence determines the firing order. The firing order is followed clockwise around the distributor cap starting from the 6:30 position with the 6:30 position being the number one cylinder spark plug wire.
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The firing order makes sense if you know how the cylinders are numbered. The number one cylinder is the front most on the drivers side and 2 being the front most on the passenger side. From front to back, the cylinders are odd numbered on the drivers side, and even numbered on the passenger side.
See the diagram; Click to open a printable larger image in a new window. The firing order starts with the number one cylinder. We would connect the number one spark plug wire to the distributor cap terminal in the 6:30 position. distributor.pngSince the next cylinder in the firing order is 8 (passenger side rear), we connect the number 8 spark plug wire to the next distributor cap terminal (approximately 7:30 position) in the clockwise direction from number one. You need to be sure you continue the firing order in the clockwise direction around the chevy small block distributor cap from the last installed spark plug wire. Setting the rest of the firing order is just a matter of repetition. Be sure to count the spark plugs from front to back on each side of the motor to identify the correct cylinder number in the firing order.

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Hope this helps. The ignition coil:
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Spark plug wires:
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The firing order is 1-4-2-5-3-6.

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Check to make sure you have not cross the wires and your firing order is off by one wire. 
http://autorepair.about.com/library/firing_orders/bl-fo-8792.htm

Good luck and hope this helps. 

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