Need more information (such as engine size) to tell you why. Experience is anyone of them can misfire but Fords of that vintage sometimes have problems with cooling leaks on that hole from heater hose I had exact same problem on my '99. Leak on #4 plug caused damage to the coil. Changed hose and coil. Coil very easy to replace. My brothers 98 F150 had the same problem, had to change the intake gaskets. All four corners of the intake was leaking. Took about 4 hours to repair. His was a 4.6 motor.
misfire # 1 cylinder
Your PCM is detecting a misfire with in the first 1000 revolutions of engine start up. This code is usually but not always accompanied by a cylinder specific misfire code.
An engine cylinder misfire has been detected in the # 8 cylinder
P0306 Cylinder 6 Misfire Detected
have misfire on #5 on a ford f150 4.6. changed spark plug and coil pack and injector.
Trouble code P0302 means: Cylinder 2 Misfire Detected
Check the spark plug and the wire on the 8th spark cylinder. Corosion, short, or just bad.
An engine cylinder misfire has been detected if your check engine light is flashing
If the check engine light is flashing that means an engine cylinder misfire has been detected
If the check engine light is blinking that indicates an engine cylinder misfire has been detected
If the check engine light is flashing that means an engine cylinder misfire has been detected
The number 5 engine cylinder is misfiring