Hold on. We need to actually diagnose this. The pickup coil in the distributor will not cause what you described. The engine will not run at all when that fails. Sputtering that starts suddenly is not going to be solved by regapping the spark plugs. We change them; we do not try to fix old plugs. Our customers would not appreciate spending their money to have us make old parts limp along a little while. Also, forget cleaning the throttle blade. That causes a hesitation on acceleration on GM cars. That comes on over a period of years, never instantly.
The IAC is the "idle air control" motor, also called the automatic idle speed, (AIS) motor. It is involved with what its name implies, idle speed. If you have a problem of low idle speed, check the air passage that valve sits in for carbon blocking it. That has not been a problem for many years with the better additives in today's fuels. The throttle position sensor is the least important sensor for proper engine performance, and it will not cause sputtering or misfires. It is sealed too, so there is nothing related to it you can clean.
The most common cause of this symptom is spark plugs and wires, so start with those.
Wednesday, December 21st, 2016 AT 3:26 PM