I own a 1991 2.0 dohc sierra glx, efi. Recently got the car, havent cleaned the fuel injectors yet, thought it would run better if I did. So, how would I go about doing this? What would I need? Thisbeould be my first time doing this, so any tips are welcome

 

You would need to send them away to be ultrasonically cleaned and flow tested afterwards. Personally I wouldn't bother if it's running ok!

 

Not really, sometimes rpm stutters when in neutral, fuel economy is pretty bad too