How to change the spark plugs in a 1998 E150 conversion van and whats the firing order

1975 Ford Truck E150 1/2 ton Van 4.9L 1BL OHV 6cyl

The Firing Order

Select the part number to view the diagram.Firing order 1-5-3-6-2-4 -------------front ' ' of ' 1 2 3 4 5 6 ' vehicle '' Distributor rotates clockwise ------------

1975 Ford Truck E150 1/2 ton Van 5.8L 2BL OHV 8cyl

The Firing Order

Select the part number to view the diagram.Firing order 1-3-7-2-6-5-4-8 ---------front ' 1 2 3 4 ' of ' ' distributorrotates counter vehicle ' 5 6 7 8 ' clockwise---------

go to a parts store and open a book called specs for that type engine or call the dealer and they will give you the order of firing you need free also ask for distributor firing order this will allow you to match the distributor to the spark plug order on engine

here is a link that should help you shows a picture of what cylinder numbers are and firing order
http://www.autozone.com/autozone/repairinfo/specifications/specificationsMain.jsp?childCatName=Firing+Order&childCatId=26200242&categoryNValue=26299999&categoryNameForTitle=Ignition+and+Tune+Up&categoryName=IGNITION+AND+TUNE+UP&childCategoryNameForTitle=Firing+Order#

If your trying to change spark plugs remove one wire from a plug, replace that plug, reinstall the wire onto that plug and move on to the next plug. You don;t need to worry about firing order unless you plan on changing the wires or the cap and rotor. Even if you where to change the wires if you did them one at a time than the new ones would be in the exact same place as the old ones and there is nothing to worry about,

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Remove boot to spark plug using a boot puller. Unscrew spark plugs using a spark plug socket, extension, and ratchet.
Do them one at a time to avoid confusion. Installation is the reverse of the removal.
--- FIRING ORDERS NOTE: To avoid confusion, remove and tag the spark plug wires one at a time, for replacement. If a distributor is not keyed for installation with only one orientation, it could have been removed previously and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement of the plug towers in relation to the engine. For this reason, it is imperative that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes in your book to reflect how your engine is wired. Fig. 1: 2.0L and 2.4L Engines Firing Order: 1-3-4-2 Distributorless Ignition System
Fig. 2: 2.5L Engine Firing Order: 1-2-3-4-5-6 Distributor Rotation: Counterclockwise

For the 1998 Ford Econoline Van:
I do not know if you have the Econoline E150, E250, E350 Model; or the 4.2L V6, 4.6L V8, 5.4L V8, or the 6.8L V10 Engine; however I have included all below.

For the 4.2L V6:
Firing Order:
1-4-2-5-3-6
Cylinders:
......(back)......
|..3..|.......|..6..|
|..2..|.......|..5..|
|..1..|.......|..4..|
......(front)

For the 4.6L V8:
Firing Order:
1-3-7-2-6-5-4-8
Cylinders:
Click on the following direct free Link:
http://autorepair.about.com/library/firing_orders/bl-fo-4591.htm

For the 5.4L V8:
Firing Order:
1-3-7-2-6-5-4-8
Cylinders:
.........(back).........
|...4...|........|...8...|
|...3...|........|...7...|
|...2...|........|...6...|
|...1...|........|...5...|
.........(front)

For the 6.8L V10:
Firing Order:
1-6-5-10-2-7-3-8-4-9
Cylinders:
............(back)...........
|....5....|.........|...10....|
|....4....|.........|....9.....|
|....3....|.........|....8.....|
|....2....|.........|....7.....|
|....1....|.........|....6.....|
...........(front)

Let me know if this helped, or if you have additional information questions. Feel Free to contact me at FixYa.com!

Hi, you will need to do a compression check on all cylinders, compare results, IF this is ok, check spark plug cap, lead, rotor arm, distributor cap.


You say plug was "wet & blackened", was that fuel (plug not firing) or oil ( oil getting up past rings into bore )
The latter is expensive. (strip/re bore etc. etc.)

Here's the firing order:

Because you didn't say which engine this link will take you to a proper site that has what you need