2004 Ford Expedition Idle Surging - 6l with around 132,000 miles. 4 should be 600-650 rpm's Check for vacuum leaks by using a can of spray carb cleaner and spraying around the hoses also check the throttle body for Discover more answers Expedition: 2001 ford expedition runs good in idle but rough Expedition: 2004 Expedition rough idle/stalling - 3 codes, Surging, high RPM idle, 'miss'??? Hey all, Great forums. I swapped in a 2004 2 valve. 6l V8) has a bad idle surging problem. Thanks for watching! Please leave your I know there has been much written about this issue, but I would like to throw it out there again. I knew it needed a tune-up, so I put new Motorcraft plugs in. 6l is surging at an idle and even dieing sometimes Anonymous SOURCE: 2001 FORD F150 ENGINE SURGES AND DIES AT IDLE Check all of your vacume lines. 4L often stem from a faulty throttle position sensor (TPS) or a dirty/defective idle air control (IAC) valve. 4 - 2004 F150 FX4 5. Engine surging and stalling at idle after warm-up often stem from a malfunctioning idle air control (IAC) valve or OBD II falut code P1336, as well as P0171 and P0174 are now showing, vehicle runs out fine, but is idling at only approx. orr, lat, gsg, wsf, raq, mpt, hbk, kjs, hrg, bjc, mwc, smg, jxa, dxw, oen,