is an adjustable fuel regulator needed if you custom tune your car say with tuner cat or mail order tune? or do you just adjust it thru the computer

 

There is no need for an adjustable regulator, unless you have fuel system modifications that make it necessary. On a MAF car, tuning is not done with the regulator.

 

thanks. just trying to narrow down my problem. i think i may have it thrown off by jacking with the regulator. imma swap fuel lines back over to the one with the stock regulator. i have a mail order tune so ill see what it does