The vehicle was idling rough and hunting with the air conditioning turned on.

The vehicle had an unstable idle, hunting between 800 and 400 RPM when the air conditioning was engaged. The issue had been present for approximately two months and remained consistent. The vehicle had an extensive prior repair history including replacement of the inlet manifold gasket, throttle body O-ring, air valve solenoids for the throttle runner flap, catalytic converter, and oxygen sensors — none of which had resolved the concern.