What is firing diagram for jeep 3.7!

all in the link

https://www.google.com/search?q=Firing+order+diagram+2004+Jeep+Grand+Cherokee+limited+4.7

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1-5-3-6-2-4 Clockwise alt="Cables order">

Firing order 1.2.3.4.5.6
Looking at engine , number 1 cyl left front,number 2 left middle,3 left back
Number 4 right front,5 middle right ,6 back right
Fault codes indicate missfire cylinder 2 and 6

Remove all plugs and compare them with each other. Does 3 look different to the others. Look at the plug connectors carefully to see if there are signs of shorting through the insulator to the cylinder head. Check the resistances of the high tension lines from the coil to each plug in turn. If one seems much higher than the rest then this will need to be replaced

you may try your rotor button and distributor cap. and spark plug wires. try your map sensor also they tend to cause a lot of misfiring if they go bad.hope this helps.

Fuel injector cleaner commonly has a low success rate, and will not help if it's more than one cylinder that is missfiring. The fact that you have a "rattle" noise, leads me to beleive the engine is not receiving fuel on one or more cylidners. If it is all the cylinders, than the fuel pump may be the culprit, or the fuel pump circuit. But if only one cylidner is missfiring than it is a possibly an injector. A code P0300 refers to all cylinder missfires, and any code between P0301-P0308 distinugiushes a particular cylinder.

Misfiring
1- a general electrical tune-up (spark plugs, wire set, cap & rotor) is a basic start to cure this issue. Wiggle the dist shaft while you are in there, if you have one.
2- Then a good carbon cleaning / throttle-body cleaning.
3- Vacuum leaks at any of the hoses that connect to the Intake manifold; especially the MAP sensor connection.
4- If that does not help then the O2 sensor could be bad or drifting.
5- Funky coil/coil-packs
6- Theoretically a microsecond glitch in either the cam or crank shaft sensors would cause this, but I am not aware of this as a typical cause.
7- Lastly a funky PCM but again it is not common for this to cause miss-firing.

Note for the V8 then also:
a) bad erg valve (this dilutes the combustion gases and hence raises the combustion temp
b) a leaky plenum/Intake manifold gasket. Leaking Intake gasket symptoms

Also can check the TSB 18-48-98 Ignition System Cross Fire/Secondary Ignition Wire Induction (Complete Version )

Hope help with this (remember rated this). Good luck and have a nice day.

I'm not sure if you have a Cherokee or Grand Cherokee or what size Engine (2.5L, 4.0L or 5.2L). I have included all three below.

For the 2.5L
Firing Order:
1-3-4-2
Cylinders:
(back of engine)
......4
......3
......2
......1
Distributor:
(back)
.....3
1.......4
.....2
(front)
For the 4.0L:
Firing Order:
1-5-3-6-2-4
Cylinders
(back of engine)
.......6
.......5
.......4
.......3
.......2
.......1
(front of engine)
Distributor:
...(back)
....5...3
1...........6
....4...2
...(front)

For the 5.2L:
Firing Order:
1-8-4-3-6-5-7-2
Cylinders:
(back of engine)
8............7
6............5
4............3
2............1
(front of engine)
Distributor:
(back)
.........3
...4.........6
8...............5
...1.........7
.........2
(front)

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

bad fuel pump can cause this or plugged fuel filter but i believe they are one unit

Check this info... Wiring Diagrams with the graphic firing order for 6 and 8 cilinders.

Good luck!!!