My 3.0 MTX SHO is a beast cold. The engine runs fine above 1500 rpm but will stumble, load up and die below this when cold. Warming up eliminates the problem. Code reader gives me a 59...which I have had since the last time I checked 6 months ago. IAB is clean. EGR passages have been cleaned. ECT and ACT sensors are hooked up. I bought 2 news sensors for $60 but await you input before installing them.