Is it my idle Air Control Valve?
Recently everytime I crank my 1999 v6 it does this weird rumbling noise and my RPMs just jump up and down really quickly. Its like its a really bad idle. Its of course only when its in idle as well. But my check engine
light doesnt come on tho. Just wondering if this could be what it is. Thanks!!!
1999 V6 Mustang Dark Satin Green , SR CAI, BBK 65mm Throttle Body, Screaming Demon Coil Pack, SR Lowering Springs, Pioneer Stereo, 2 12' inch subs and 1600watt amp, Green Calipers,