you have to coax the accelerator alot to keep it running then it will idle, pops in the fresh air intake area when you increase the throttle. sometimes if you do it slow it will get past some of the pop and rev higher. It pops no matter where you put the timing. Checked the distributor all is timed right but EGR doesn’t seem to be working right. Also no codes
1) Perform a complete tune up : plugs, wires, cap and rotor …. Eliminates possible arching and probably needs one anyway.
2) Perform a compression test on each cylinder : all cylinders should be with in 20 PSI of each other usually between 120 – 150 area. If you see a loss of compression you may have a burnt valve ( seeing as it pops no matter where you put the timing )
The only way for it to pop is for the spark plug to spark at the wrong time or for the valve to be open when it happens. Extreme premature detination is a possibility ( did you just put a fresh tank of BAD gas in it ) Feel free to check out some of the other resources on the website as there may be some helpful information available.