'99 Caravan - Missing Problem

I have been having a problem with the engine missing for some time now on my Caravan. I have had the plugs & plug wires replaced several times. I can put a new set of plug wires on & in about 1-2 months the missing starts again. Anyone have any ideas? Someone mentioned checking the ground strap to see if I have a good ground. Does anyone know where this is on a '99 Caravan? Any help would be greatly appreciated.

Welcome to AF!

You may want to check the coils on your van. When you put new plugs and wires on they are at their lowest level of resistance. As they wear this resistance will increase slightly and if you have a bad coil it will run ok until this slight increase happens. I would look for a new set of coils and try that. I believe it should eliminate your problem.