Failed COPS

[RobbyMartin]

I'm not an engine guru so thats why I'm asking you guys about this. I don't know if the problem was tune related or engine related. I thought my 4.6 was bad, but my 5.4 takes the cake with these COP's. I didn't know if running rich or lean could case the failures or what, I'm just trying not to spend $40 every other month on the same part.

[907DAVE]

Well, on the plus side you will have ALL new coils within the next month or so...................problem solved.


Seriously though, I dont quite understand why Ford has had so many problems with these coils. Back in the day they could use one coil for everything and a failure was almost non existent, now there is one for each cylinder and they fail all the time.

[88Racing]

Originally Posted by 907dave

Well, on the plus side you will have ALL new coils within the next month or so...................problem solved.


Seriously though, I dont quite understand why Ford has had so many problems with these coils. Back in the day they could use one coil for everything and a failure was almost non existent, now there is one for each cylinder and they fail all the time.

Engine management control.

[907DAVE]

Explain.

[Jackpine]

I'm pretty sure 88's talking about how the PCM can shut down half of the cylinders in the event of overheating. In this case, spark and fuel are cut off to those cylinders.

- Jack