Your welcome, always interested in making some of these ideas work.
Here is a few more ideas.
The use of the transmission cooler is a fair idea, but you’re limited to only 195 degrees, IE the thermostat’s control temp.
The real question is what is the best temperature for fuel that will promote better vaporizing and not harm the injectors…??
Another old idea was an oil vapor separator allowing the engine to then draw in the lighter elements of this vapor and burn it as well.
And another one is to draw into the engine the gasoline vapor from the cars vapor recovery system. (I suggests looking this one up.)
As for PCMs check these out:
https://www.ebay.com/sch/i.html?_fro...olers&_sacat=0
Especially this one…
https://www.ebay.com/itm/Narrow-Band...75.c100623.m-1
I cannot say if they work, but they might…they claim to allow you to change the sensors feed to the PCM.
This one has New Thermostat Switching at proper operating temperature Tstat (Thermostat sensor) Quad “True Digital” Signal EFIE handles up to 4-02 Sensors
Adaptive Control for adapting to the Newer 25ms. Oxygen Sensors MAF/MAP Control for for leaning your fuel flow to your engine. IAT Control for adjusting and retarding your ignition timing. CTS Control for forcing your ECU to select leaner fuel mapping. Automatic Sequential Switching, following the ECU chain of command Take Control of your ECU and AFR.
I would try using one of these WITHOUT any HHO...HHo systems are a mess..I tried a few and they are just crap.
BUT tune with one of these alone and see what happens.
And as always good luck.
Rich