Ford Explorer HHO and EFIE MAF affects

[TimSDobson]

Is your truck running ODB2

[breaksteel]

Unlikely, OBD2 was introduced in 1996, a 92 would not have it unless someone decided to install it after the fact.

[Gforce1956]

I am running OBDII on my 98 Expedition through an ELM to my laptop. Works very well for monitoring. You can display both O2 outputs.

[insAneTunA]

according to zerofossilfuel you need around 1 to 2 liters of hho gas per minute for every cubic liter engine to get optimal results. Check his youtube channel, there you can find the URL to his website so you can get more information about this subject.