Car will not start

Don't have help with testing coil rail right now. Any other thing I can test?

Also tested all fuses. Will the governor pressure sensor or solenoid not allow the car to start. These are the first two things after it wouldn't start the first time.

Engine Mechanical problem
2004 Jeep Cherokee 6 cyl Four Wheel Drive Automatic

Initial engine light, eventually flashing, and running like very, bad fuel. After two, independent management systerm diagonoses in two states; nobody finds a CAUSE for a # 3 misfire. Mileage is +/- 87,000. The car never actually stalls, and never fails to start; but after driving awhile, it runs VERY ROUGH! Replaced plugs, filters, plug boots, fuel injector and sleeve, and ignition coil. After these changes, auto ran perfectly for over one month.
I am elderly woman who fears being stranded again on I-69 or elsewhere. I see some similar descriptions, for older models, on your site. And they were always referred to service shop for diagnosis. I have done that twice @ almost $1,000.
Please help. Jt

Ok will do thanks for your time

Don't know what brand plugs/wires were used, but they charged ME $4.19 each. The coil was $195.00--is that cheap?

The last service notes say:
"EEC Tests codes 203 and 303 #3 cylinder misfire. Recheck plugs and coil assy installed previouslyl.
Swapped #2 and #3 plugs; and misfiire stays in #3. Check online NAPAFIX hotline. Several possibilities."
No fix.
Jt

Ok tested coil pack. Is it possible the whole rail went bad?

2004 Jeep Grand Cheorkee SE.
When I try to start the vehicle, absolutely nothing happens. The engine does not even begin to turn over. However, if I sit and try to start the vehicle multiple times(minimum 20 times), it eventually starts in the manner in which it should.
The weird symptom that may give some indication as to what the problem is what the gauges are doing prior to attempting to start the vehicle. The gauges will spike up to about 25% (ie, 30-40 mph on the speedomoter) and then immediately go back down. All gauges do this and are in sepuence.
The only other note is that while the vehicle is in this "no start" mode. Is that all electrical functions do not work. Radio, door locks, windows, etc all do not function.
The vehicle has done this to me 3 times, but on all occasions has eventually started up with persistance. However, I would like to fix this asap.
Thanks in advance.

Wow. Thanks for the quick response. Ok.I will do that. Thanks again.

Drove the jeep to work acted fine check engine light was on. Went to lucnch light was still on, went back to work the parked it. Came back out after work it would not start. I can hear the fuel pump turn on and the engine cranks but will not turn over. So far ive replaced the spark plugs because the were way overdue any suggestions

Started doing my own trouble shooting Read up on a couple of Forms then I checked the basics Made sure I had fuel in the fuel bar which I did then I did a spark check by shoving a screwdriver in my coil pack and having a buddy turn the key felt no shock found out that the Crank Postion Sensor controlled voltage to it so I replaced the CPS and vola it works now

It crank but it won't start and all gages are down

Check for injector pulse, if none replace crankshaft sensor, if it has a pulse, check fuel pressure. Thanks for using 2CarPros