I have a 5.7L TBI engine in my 94 GMC C1500. The truck is running really terrible. It’s sucking in ALOT of air through the intake without pressing the pedal also it has a really rough idle and when accelerating it sputters and kind of hesitates. It started with the O2 sensor code. I replaced it. Code went away then code 32 popped up. I replaced the EGR VALVE and the Solenoid. Still was having issues. I just replaced the TPS sensor, spark plugs, MAP sensor and still having the same issue.
Could it be the IAC Valve messing up or something else?