Idle air control...i know... put a brand new motorcraft one on today with no luck. along with a throttle position sensor. the motor is 4.6 lincoln mark 8 with an msd dis-4 ignition. K&N cold air. the problem happened randomly about 3 weeks ago while driving home from work and the motor started to sputter out and was near impossible to drive, luckily i was close to home. figured id let it sit overnight.. as i had hoped it started perfectly and went on an hour cruise to make sure all was well, of course having some fun with the right peddle every now and then having no issues until i am almost home again! Now it is at the point where it will barely idle, the motor shakes, and if you touch the throttle at all it dies. 30psi fuel pressure at its attempted idle. all of the wiring to the msd is good, triple checked. throughout the last few days iv replaced the tps, IAC, new msd coil packs and new plugs. the idle slowly got a tad better but not much. also the exhaust smells like fuel. makes me lean towards MAF, but THAT is new too! im stuck scratching my head...any help would be appreciated thank you.