Ok, i've been having this problem for awhile now and nothing has been able to fix it. I chug at slow speeds mostly and sometimes at high ones when i lightly hold down the gas pedal.
Looking for a vacuum leak and i heard clicking coming from under the TPI plenum. It might have been the fuel pressure regulator or something. is it supposed to make that noise or what?
please help

 

GTA,

If you hear a light clicking that is regular (doesn't vary in intensity) and varies in frequency with the engine speed, you are probably hearing the injectors. They normally generate a light "click" each time they operate.