ozzie bob

Hi, I am having running issues with my 94 suburban that has had an LS1 conversion.
It has also been fitted with a Mongoose car alarm....
My question is ,

Has anyone else found that the fit up has interfeared with the running of their Aussie built LS powered cars?

My engine is only running on the Left bank, changed coils and injectors across to the right to cross check. still Left side only.

I feel that the wiring is too small/thin on the alarm system and may be creating a voltage drop or something similar.

I am also getting about 27 lbs pressure at my fuel reg...maybe limp mode?
New fuel pump and filter,spark plugs done and still no change.

Bob