Engine cylinder misfire?

Ok will do because first it was cylinder 3 then 1 then 5 and they checked and there were no vacuum leaks

It ended up being that the coil pack which was already replaced was bad so they got another one from the dealer

Ive been fighting a check engine light for 4 months now. Its the same code over and over. The code is P0301, which is a cylinder 1 misfire detected. Ive replaced the plugs, wires, fuel injector, fuel filter, intake gaskets (upper and lower), cleaned the egr, replaced the IAC valve, and ran cleaner through. Ive checked compression in the cylinder and its good. Vehicle runs smooth as silk when its warm and the a/c is off. But if u turn the a/c on its misses at idle or in gear at idle. It drives smooth. It seems to only miss under a load. Ive checked fuel pressure and it seems to be good. Id appreciate all the help I can get. Thank you.

Ford has run dianostics on car and found nothing to be wrong. But the check engine light remains on and still misses under the load of the a/c. I was thinking possible fuel pressure issue but seems to me that it would do it all the time. So u think the cam sensor and crank sensor are out of sync. Should I replace them or have them tested? Im all out of ideas myself.

Dove straight 600miles yesterday. Car was fine until about two hundred miles to go. Then the check engine came on. I continued to drive and watched the rpms and temp everything seemed fine. Then I got into town and slowed to around 30mph then the car started to jerk badly. But goes away when I speed up. On sunday I have to make the same trip to take my daughter back home. WIll it be ok to drive?

The car skips at idle with a/c on and going down the road under load I replaced plugs and wires did not help. Service codes po301, po302. Po303,304,305, and upstream o2 sensors are reading lean, any ideas?

I figured out it was my coil pack. But I appreiciate you trying.

Well I took it in this morning at a full limp, and got it back at a partial limp. Plug wires now replaced evaporation leak found(under the car where it bottomed out and smashed some kind of valve that regulates gas fumes when you fill up?That was the evap code, I guess). Now my baby is misfiring on cylinders#1 and #5, code P0301. I am supposed to bring it back next week to have the coil pack replaced at $400.00, and he says that "might" fix the problem. I am wodering if this misfire suddenly occurred because I was driving it with the check engine light on for so long(back when it was only an evap code a few days ago)I just can't afford the 'hit and miss' style this is starting to look like. Please help! Merlin2021, thank you for trying! :Cry:

Well, it's come down to this: I feel like I'm being taken, but I'm going in anyway at 10:00. Maybe he really will fix it completely, especially after I have given him this much money(after today, the total will be 500$).I really have no back up plan, and I am discovering that it's impossible to take care of my kids' needs without a vehicle. I just want to believe that the mechanic will do the right thing and that he will know what he's doing. I have to do something. I tried to get him to look at my conversations with you, and he said no. :Cry:

I have a misfire code and excessive back pressure and when accelerating from a stop in town it pops, hesitates then runs ok, could one catalytic converter being plugged or partially plugged? And I can not afford a new one if I drop the y and drill one to two small holes threw the converter can I get away with driving from california to texas which I have already done twice and when I drove it non stop without a rest once going and again back it would lose power completely but I just popped the hood and let it cool down then it was ok but when I lost power it was no response at all in the foot pedal (like I ran out of gas)but did not

Engine Mechanical problem
1997 Mercury Sable 6 cyl Front Wheel Drive Automatic

where is cylinder #1 and how do I set at top dead center? A mechanic had told me to remove the plug and stick a screwdriver im there and see if the piston is up, if not remove screwdriver and turn key to rotate and check again. Is this logical or is there an easier or better way to do this?