Ok, thanks. I will check it more thoroughly tomorrow. Yes the AI is removed and in its place a Jinks retrofit. More tomorrow, thanks to all
quote]More likely you have an air leak on the intake side, but leaking at the head/header juncture is a possible cause. You have a '03, so deterioration just from age is bound to occur. You do not mention if your air injection is still intact, or any modifications you have made, popping is a common occurrence, with the same old culprits as the cause. Look for unwanted air entering the system.
