Code 34 after a Hydrogen generator was installed and running

Hello I need advice on my vechicle I have a 89 pontiac GTA Transam 5.7L V8 TPI 72,000 miles
. After I installed a hydrogen generator and ran the car on it for a hour, my car wouldnt start. I was getting code 34 flashing on the dash, which is map maf sensor pressure. This happened to me in the past with this device. The first time I had to let the car sit for a day and the next day it started fine with the device dissonnected.
Well the makers of the hydrogen generator said that some cars you may have to retard the timing on it, because the hydrogen burns quicker then the gasoline. If my timing got messed up would that give me a code 34?
The generator doesnt run solo on the car it only shoots hydrogen into the car intake which is after the maff sensor. The car still runs gasoline and isnt a hydrid. IT just uses some gas from the generator and the car to save you on fuel economy up to 22 percent. It burns both at same time. I read that a clogged catalyic convertor would do this, but my exhaust system is new.
I just checked the car today and It runs but when u stepp on the pedal is dies. I dissconnect the maff sensor and it runs fine. When I plugg sensor back in when car is running it kills it. Any help is appreciated