check your compression on #4 cyl
if a cylinder is not firing there will be no spark at the spark plug. Carefully twist as you pull the ignition wire out and start the engine. when the wire gets close to the spark plug you should see an arc. This means the cylinder is firing
There are several possible firing orders of a six cylinder engine, in practice however, mostly it is 1-5-3-6-2-4. The ignition interval is also at 120 degrees.
The ignition coil packs have the cylinder numbers listed on them. The cylinder closest to front of engine (where serpentine belt is) is cylinder #1, the odd cylinders are on this side of engine. Cylinders are in order from front of engine, ignition coil wires display their positions of which cylinder they belong to.
try changing your spark plugs if theres any.
Firing Orders Ford 4.6L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition systemFord 5.4L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition system (One coil on each cylinder)Ford 5.8L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributor rotation: CounterclockwiseFord 6.8L Engine Firing Order: 1-6-5-10-2-7-3-8-4-9 Distributorless ignition system (One coil on each cylinder)Ford 7.3L Diesel Engine Firing Order: 1-2-7-3-4-5-6-8Ford 7.5L Engine Firing Order: 1-5-4-2-6-3-7-8 Distributor rotation: Counterclockwise -------------------------------------------------------------------------------------------------------- The # 2 cylinder is the 2nd cylinder from the front on the passenger side of the engine
Check the list I put together below for the Cylinder Firing orders... Firing Orders Ford 4.6L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition systemFord 5.4L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition system (One coil on each cylinder)Ford 5.8L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributor rotation: CounterclockwiseFord 6.8L Engine Firing Order: 1-6-5-10-2-7-3-8-4-9 Distributorless ignition system (One coil on each cylinder)Ford 7.3L Diesel Engine Firing Order: 1-2-7-3-4-5-6-8Ford 7.5L Engine Firing Order: 1-5-4-2-6-3-7-8 Distributor rotation: Counterclockwise
Firing Orders Ford 4.6L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition systemFord 5.4L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition system (One coil on each cylinder)Ford 5.8L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributor rotation: CounterclockwiseFord 6.8L Engine Firing Order: 1-6-5-10-2-7-3-8-4-9 Distributorless ignition system (One coil on each cylinder)Ford 7.3L Diesel Engine Firing Order: 1-2-7-3-4-5-6-8Ford 7.5L Engine Firing Order: 1-5-4-2-6-3-7-8 Distributor rotation: Counterclockwise
Firing Orders Ford 4.6L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition systemFord 5.4L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition system (One coil on each cylinder)Ford 5.8L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributor rotation: CounterclockwiseFord 6.8L Engine Firing Order: 1-6-5-10-2-7-3-8-4-9 Distributorless ignition system (One coil on each cylinder)Ford 7.3L Diesel Engine Firing Order: 1-2-7-3-4-5-6-8Ford 7.5L Engine Firing Order: 1-5-4-2-6-3-7-8 Distributor rotation: Counterclockwise
Depends on the 8 cylinder engine you are talking about. They are not all the same.
4 cylinder engine- 1,4,3,2 6 cylinder engine- 1,6,5,4,3,2
Firing Orders Ford 4.6L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition systemNumber 2 is on the passengers side second from the front of the engine.
Firing Orders Ford 4.6L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition systemFord 5.4L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributorless ignition system (One coil on each cylinder)Ford 5.8L Engine Firing Order: 1-3-7-2-6-5-4-8 Distributor rotation: CounterclockwiseFord 6.8L Engine Firing Order: 1-6-5-10-2-7-3-8-4-9 Distributorless ignition system (One coil on each cylinder)Ford 7.3L Diesel Engine Firing Order: 1-2-7-3-4-5-6-8Ford 7.5L Engine Firing Order: 1-5-4-2-6-3-7-8 Distributor rotation: Counterclockwise