had posted previously on this (SPUTTERING AND SERIOUS HESITATION) and could not get any specific answers. yesterday i double checked my injectors (how they squirt) and they were fine also my fuel filter is clean as hell. already swapped the whole dizzy and before that i changed th coill the ignighter, plugs and regapped them, wires, better engine ground wire, checked the timing and was on. my ecu does not give any codes and think i will try to swap that out to see if it will work. if all fails will go to obd1 as i have been advised to do, but i just wanted to get this problem solved first.

 

what ecu are you running exactly???

 

the ecu that i am presently running is a obd0 pr3. (stock)

 

check all your grounds, I had the same exact problem.

 

does it only sputter under partial throttle? under WOT it runs good?

 

yeah but already swapped around my o2 sensor wires on my ecu to correct this problem and it did. i am running a aftermarket header so i am using only one o2 sensor but when i put the header on it ran fine for a long time and then all this crap came up also changed out a few o2 sensors and still the same ISH.

 

try NOT running a o2 sensor that works better on pr3 and pw0 ecu's. either run both o2's in the correct runners of your header or run NONE. let me know how that works out. it helped me when I was running a pr3 ecu.

 

just a shot in the dark but if you did all that have you checked the compretion yet??? there dosnt have to be smoking to have a blown head gasket....I dont realy know the situation with your car but I would also check that just to cover the base
art

 

check your map sensor b/c my ls hatch was sputtering at low rpms and then was good after about 3500. i switched out the map sensor and it works like a charm. -matt