Cylinder 1 misfire

[tepponogu]

I have a bad misfire and the CEL says its cylinder one. Are there any known common causes of this? If not, where's a good place to start trouble shooting?

I already replaced the spark plug, and it was white, as though it had been running lean.

Thanks for any help.

 

[panda24619]

about 90% sure its your coil pack. change it. they just go bad or water has touched it and it didnt like it.

 

[Bigwill]

Coil pack but since you did mention yr and size of your engine you might have wires. I would check that next. .

 

[tepponogu]

Its a '97 5.4l.

Thanks for the replies fellas. Where is the cool pack located?

 

[tepponogu]

Just looked up the parts on line, am I looking to replace the part that has the plug wire attached to it? The one that is held in by the small bolt next to the injector?

Thanks again all.

 

[panda24619]

if you changed the spark plugs your self then you had to remove the coils. and yes this is what they look like.

 

[KC Dave]

IF that doesnt fix it, the next guess would be a bad fuel injector. JUST had this issue with the CEL and Cyl 1 misfire on my sons car and it was a bad injector.

 

[tepponogu]

Turned out to be the coil pack. Thanks guys.