2001 Ford Focus intermittent miss?

hello
Do you still get random misfire or only misfire at # 4?

The reader showed when I first hooked it up a ramden missfire #4. I cleared the code. It has not reset any codes but I still get what feels like a miss fire but it does not last long enough to set a code or to try to find what cyl. is missfiring.

Sometime, spark plug cables can hide problem in the boot,
I mean half broken wire in the boot when pulling it off from the spark plug .
we have to make really sure that the cables are very good by changing all of them.
also if the coil was crack and changed, it has put some stress on the # 4 spark plug wire even if it look ok.
changing that wire or all of them could solv the problem.

Yes I thought about the plugs and wires they look ok but I will check the ressistance in the wires to see if it shows anything thanks Stevis.

Hi Stevis
how far you got with the repair?
Did not hear from you.

Thank's for following up I put and old plug wire on #4 cyl and did not get It to missfire. The wires on it were farley new. So when I talked with the owner he decited to go back to the parts house to exchange the wires, I have not herd back form him. But I will follow up with him. Thanks,
Stevis.

To follow up with what was wrong with this car. I talked with the owner of the car he was able to take the car to a shop where they were able to incert a camera in to the cly's. and found that #4 had a lose intake valve guide. It would some times not alow the valve to close and ended up replacing the Head.
Thank's for the info you were able to provied. They said it was a common problem with tihis car. FYI incase you come apon this again.
Stevis.