Bad coilpack?

[Abdallah Hatough]

Hello, im new to jeeps
I had a missfire problem from the coilpacks according to the codes.
So I ordered a new coilpack from a company called AIP electronics, and when i replaced it i had an even worse missfire than the old one, so i tried to wrap it from under with electric tape and it worked (but it doesnt start up easy and there still a bit of missfire when i give it gas at low rpm) could it be a bad coilpack or is it something else?

I dont have check engine light or anything anymore , could it be the o2 sensor??

 

[05 Blue Unlimited]

What were the original codes?

 

[Abdallah Hatough]

O2 sensors, but the mechanic said its from the coilpack when he looked at them, and they were gone when i replaced it

 

[Chris]

Here's an easy way to test the coil packs to see if they're good or not:

 

[Abdallah Hatough]

Ill try this, thank you.

And if they are working properly do you have any idea what could it be?