dont tell me reversion. Just bought brand new dry pipes 2 seasons ago. Also why would it be skipping on one and not the other with reversion? Only other thing I can think of is injectors.

audibly the motor was skipping and missing at idle.

there are 4 items left on ignition system to check IMO...distributor coil, ignition module, spark plugs, and ignition coil.

i hope your wrong!!! lol. I’m gonna pull plugs and possibly a tail and inspect with boroscope. if no evidence of reversion I’m good. We do have some tubes used for winterizing it might be worth a shot.

i seriously hope hope the brand new valve train we just put in isn’t messed up already.

Pulled one side of plugs...no sign of water or rust. Plugs do look a little lean. Going to replace them all. I would think this rules out reversion. If it were reversion there would be serious signs of water. We do run in salt water.

Pulled all plugs and replaced. Still missing and skipping. Tried swapping ignition coil still an issue. We had computer hooked up. Originally said manifold air temp sensor issue. Swapped it. Still missing. Cleared all codes. Still missing.

the spark advance was all all over the place when it was running...trying to compensate for idle. New IAC didn’t do anything.

Any suggestions next steps...was gonna try swapping injectors? Anything else I should try?