Water (hydrogen) engine kits

Do the inexpensive (under $100.00) water (hydrogen) intruduced into the intake manifold (via hose) work and do they cause mechanical or ingnition module control problems?

Don’t work, pure scams.

They don’t do ANYTHING!! The amount of gas they produce is minuscule compared to the volume of air flowing into the engine. SAVE your money…These things are a SCAM!