Re-occuring plug/wire failure?
I bought my used 97 SE and it had the 4 cylinder wire (and assuming plug) replaced. It also had the corresponding coil pack replaced.
Recently started throwing the P304 code, and replaced the wires and the 4 cyl plug after noticing that there was arcing going on with that plug and wire.
About a month later, I'm noticing the same symptoms happening again, but no code yet.
My guess is this motor had that problem before, and the previous owner hadn't fixed with with the coilpack/plug/wire fix.
Is there anything that would cause a specific plug and wire to fail (arcing?)