Hi, A few things you can check, first the dist. cap, look for carbon trails, check the rotor too. look for cracked or bad plug wires, firing order too.18436572. if that isnt it, check your valve lash,you may have a tight one. do a compression check, a burnt intake valve would give a constant pop. even a bent pushrod would do it. This is all a good place to start. there are alot of things to go wrong but these are the most common. Good luck