1999 GMC Savana 3500 Q&A

1999 GMC Savana 3500 Question: What are the special procedures to restore the fuel injectors?

Do you have instructions for replacing fuel injectors? -
Answer 1
first of all why do you need to replace the injectors -
Answer 2
what is the van doing that you suspect injectors? -
Comment 1
did tune up and changed maf censor -
Comment 2
do u have any eng codes? -