I had the same issue with a 1997 SLS. I started with replacing the fuel filter and it has helped.
It is bolted in the very top of the TBI housing behind the 2 injectors. The whole top of the housing will have to be replaced if the regulator is bad. It is all made together.
Fuel injectors need to be replaced every so often. If the fuel injectors are not working, they may be too old, and need to be replaced or put in properly.
the regulator and motor need replaced. they can both be ordered on line for about $65. and have a local car window shop install them for a $100 or less. the regulator will come with the motor installed. just make sure you order the new regulator with motor. a local cadillac shop or window repair shop will try to charge you over $500 to fix
The regulator is in the engine computer not the alternator.
Sounds like the brushes need to be replaced. Find a shop that can check your regulator, and who can rebuild your generator.
fuel pressure regulator
The voltage regulator is attached to the vehicles alternator. It can be replaced as a separate unit.
When you replaced the injectors, did ou also replace the O rings? Are the injectors seated down in there OK? Try twisting the injectors a little after you've seated them
AnswerCheck fuel filter, which should be back near the fuel tank, and ckeck the fuel line for blockage.last fuel pressure regulator.
If it worked before the regulator was replaced, something was done incorrectly. If it didn't work before the regulator was replaced, the electric motor, switch or wiring may be at fault.
The regulator is in the engine computer, and if failed the computer will need replaced.
The voltage regulator for a Hyundai Tuscan is on the back of the alternator. It is bolted on and can be replaced separately.