Second COP in 6 Months?

[acolic]

Hi,

My truck was running really rough in the Spring and the trouble code indicated a COP problem with cylinder #4.

So I changed that COP and everthing worked fine.

Six months later, the truck is rough again I'm getting the same error.

Any idea why a COP would fail that quick?

thanks

Alex

 

[Bowesmobile]

Coolant from the heater core hoses dripping on it?

 

[GAINMOB]

may be time to change them all...if its the cops again

 

[BIG GREEN FORD]

If it's the same coil that went bad and there is no water/oil on the plug. Then its the coil pack brand.. what are you using for brand?
It could also be the connector coming out from vibration.

Take the coil of check for cracks/fluid on the boot if it looks fine get electrical grease and apply to the connector and also add to coil spring in the boot.

 

[FordandPolaris]

Did you change the spark plug along with the COP?

 

[acolic]

Hi,

plugs were changed about 6 months before the coils were.

The coils are ACCEL 140032 Ignition SuperCoil. They seemed to be rated high.

I'll try taking everything apart and putting it together again.

 

[american steel]

Hi,

plugs were changed about 6 months before the coils were.

The coils are ACCEL 140032 Ignition SuperCoil. They seemed to be rated high.

I'll try taking everything apart and putting it together again.

I always ran accel or msd coil packs on LS and OHC ford engines.
there is nothing wrong with accel packs, I know there is a problem with coolant that hits number 4 and sometimes the pack in front of 4. you changing your spark plugs 6 months before wont cause the misfire.
I've seen problems with either the harness creating issues going to individual cylinders
and you might have an injector problem and or the ECU is doing some thing whacky that it isn't supposed to do. I build these engines and I build a lot of them yearly im familiar with this problem.
if you do have an injector issue with that cylinder then you need to replace all injectors or clean them, because if 1 is going bad the others will follow or will act odd.
now there also is few other possibilities that you might have a problem inside the cylinder bore sorry to write that on here and im not trying to scare you it is what it is man!
something stupid is probably causing your issue.