Engine Rough Idle

[BlackRod]

When I start my car, it runs fine. As soon as I touch the gas, there is a misfire on the passenger side. Lasts until I turn the car off. It's a 2005 GT, mostly stock (Cai, tune). This just started. Fairly new spark plugs. What do you guys think it is?

 

[SpartaPerformance]

I would assume no C.E.L.??? Sound like a coil failing, you may have to wait for a C.E.L.

 

[BlackRod]

That's right. No code or cell.