my car set is ti with afr heads the other day right before i was about to get on it i heard a noise or back fire kinda like a holley does with a blown power valve and then a hear a tappin like a consistant miss or was thinkin maybe a plug got loose checked that that wasnt it pulled the valve cover rockers still seem fine no slack in the push rods look fine but just have it comin from one side almost sounds like a valve is hitting somthin i cant figure it out it dont seem like a mushroomed lifter ive had that problem rockers pushrods look fine any suggestions whould be great have any of u ever had a valve seat go bad or valve im clueless on this sound

 

If your car is stock by your sig it is, check your exhaust gas recirculation valve on top of your exhaust manifold the one with the 3/8 steel lines going to it, check the threads for a small crack , mine went and it sounded like a lawn mower, I couildn't find it at first but it developed and was found

 

actualy i have slp headers afr 195 heads on a 350 people have been sayin brokin valve spring bent valve still trying to figure it out sounds like air escaping from an exaust valve kina like if u didnt have aspark plug in just shooting air sound with a ping almost as the valve hitting or the piston hitting the valve vise vursa but it seems its from the head just 1

 

Well youv'e allready pulled the valve cover and found nothing corrcect? You would have seen a broken spring or bent valve. I still believe you should check that recirc valve on the exhaust manifold or the header gasket. Have a helper get in the sar and gas it while you find where it's coming from.