2004 chrysler van 3.8 motor replaced coil pack still doesnt fire number 4 cylinder

The firing is 1 3 4 2. From the front of engine to the back, the cylinders are numbered 1 2 3 4.

Cylinders 1 and 4 are on the same coil pack. Cylinders 2 and 3 are the other coil pack.

This is not the firing order that is stamped on the coil packs.
Coils are matched by 2 pairs of cylinders for ignition spark plugs and coils system.
1- Like 5 2 and 3 6 and 4 1
2- Pairs of 2 cylinders are firing at the same time.
3- When cylinder number 5 fire at ( Power Cycle) the cylinder number 2 fire but in ( Exhaust Cycle ). That is why you have those number stamped on the coil packs.

Hope it helps.

1-2-3-4-5-6
Head (horizontal)
135
246

Coil (vertical)
6 3
4 1
2 5

Take out the harness connector (3 pin) from the ignition coil pack.
Point it to your self, the lock is upwards. There are 3 female pins on the connector. The right most connector is the switching signal wire to cylinder number 2 and 3 simultaneously. Center pin is 12 V supply and the left most is switching signal wire for cylinder number 1 and 4 simultaneously.
Now the problem may lie in:
- The high tension cords.
- The short or open circuit between the ignition coil pack connector and the ECM.
- Short or open circuit between the camshaft position sensor and the ECM.
- Short or open circuit between the crankshaft position sensor and the ECM.
- Valve timing incorrect, or timing belt tooth over jumped.
- Broken or damaged crank shaft sprocket.
- The ignition coil pack.

Please read about misfire diagnosis and repair here.

Firing order is 1, 5, 3, 6, 2, 4. Number 1 cylinder is up front. Why would you need the firing order, this engine does not have plug wires, each plug has its own coil pack, each coil pack is controlled by the computer.

STANDING FRONT OF VECHICLE CYLINDERS FACING YOU ARE 4 5 6 AND BACK CYLINDERS IS 1 2 3 NOW ON PIECE PAPER LOOKING AT IGNITION COIL PACK FACING YOU WRITE BACK NUMBERS 123 AND UNDER THAT NUMBER 1 2 3 WRITE FRONT NUMBERS 5 6 4 THATS YOUR COIL PACK PLUG WIRES LOCATION. LIKE I SAY 5 6 4 IS PLUGS WIRES LOCATION FACING YOU AND BACK NUMBERS 1 2 3 PLUG WIRES LOCATION ON COIL PACK. FIRING ORDER IS 1 4 2 5 3 6

1 is right front, but coil pack should be marked with cylinder numbers as below. Firing order is 1-4-2-5-3-6. OK?

The COIL PACK TOWERS are numbered : coil----3---4 pack---2---6 plug----1---5 ----------------------------------------------------------------- The engine cylinders / spark plugs are numbered : passenger side , front to rear , 1 , 2 , 3 -----drivers side , front to rear , 4 , 5 , 6 ------------------------------------------------------------------- The spark plug firing order is ( 1 -4 - 2 - 5 - 3 - 6 )

For the 2.4L:
Firing Order:
1-3-4-2
Cylinders:
1---2---3---4
(front of Van)
Ignition coil:
1----4
2----3
(front of the Van)

For the 3.0L
Firing Order:
1-2-3-4-5-6
Cylinders:
1----3-----5
2----4-----6
(front of Van)
Distributor:
-----2-----1------
3----------------6
-----4-----5-----
(front of Van)

For the 3.3L:
Firing Order:
1-2-3-4-5-6
Cylinder:
1----2----3
4----5----6
(front of Van)
Ignition Coil:
6---3
4---1
2---5
(front of Van)

For the 3.8L:
Firing Order:
1-2-3-4-5-6
Cylinders:
1---3---5
2---4---6
(front of Van)
Ignition Coil:
6---3
4---1
2---5
(front of Van)

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