2005 Jeep Grand Cherokee limited 4+4, is missing, replaced spark plugs, coil packs,fuel pump.02 sensors,still missing.runs ruff in idle.smell gas when it starts,

Take 2 screws out of PCM and replace with shorter ones

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you need to check the fuel pressure,and did you mean you replaced the distributor or just the rotor because inside the distributor is a pickup plate that some times causes this also 02 sensor can cause this.is your check engine light on if so go to chain auto parts store they usually read your codes for free.

Try changing the O2 sensor before the catalytic converter... mainly if you have seen a change in the gas mileage.

TO REPLACE SPARK PLUGS YOU REMOVE COIL PACK MOUNTING BOLTS THEN REMOVE THE COIL PACK WITH BOOT OVER THE SPARK PLUG.YOU HAVE 6 INDIVIDUAL COIL PACK TO EACH CYLINDER. YOU NEED A 3/8 RATCHET WRENCH - LONG 3/8 EXTENSION -SPARK PLUG SOCKET - SPARK PLUG GAUGE.AND TORQUE WRENCH.THE 2000 MODEL JEEPS FUEL FILTER INSIDE THE TANK.1993 - 1996 MODEL JEEPS FUEL FILTER LOCATED LEFT SIDE OF THE VECHICLE NEAR THE FUEL TANK.

A misfire may mean that one or more of the following has happened:

Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

If you notice symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

replace map sensor

does it turn over?? check coils or coil packs.

replace the coil pack... to confirm this pull spark plug leads off the coil pack one at a time.... note whether the idle changes. the spark will actually arc and you can hear it. if one of the plugs does not have this arcing... the coil pack is at fault.

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have you actually had a fuel pressure test done on this Jeep? I had a 93 cherokee limited and i replaced the fuel pumpo but the new one was bad and it wasnt getting enough psi's

You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.