Intake valve deposits.

[Torino]

OK Gents. The bottom line. Which cleaner/additive will KEEP the valves CLEAN after they have been manually cleaned. Just the facts please. Best regards. John

 

[BlazerLT]

Water cylinder decarbonization.

Any cleaner will leave deposits.

I use plain distilled water and I have great results.

 

[Pablo]

I have some evidence that Amsoil PI and Fuel Power will help keep (previously cleaned) intake valves clean.

If you have leaky valve stem seals, there isn't much you can do in the way of fuel additives.