Allot of good advise here..... Have you checked for vacuum leaks? Spraying engine starting fluid around the intake & listening for an rpm increase might lead you to something you might have missed IMHO.....
Have you read my posts? I've stated many times that I've checked the for codes there are none and have done the surging idle check list as well over and over again still not fixing the issue. It's not a surging idle it's a dipping idle it goes from 700 rpm down to 500 rpm and the hessitation is like a feeling that the car is starving for fuel or that the firing order is off but only happens after the car is in closed loop when in open loop the car runs fine! So it's gotta be some sort to sensor that makes the car flip out but doesn't flip out enough to throw codes. During the damn tests the car idles dips and hessistates but still won't throw a code so I'm totally confused to what's the problem.
Clean the fuel injectors, replace the spark plugs.
Plus the stock gt40 injectors on the explorer is a 19# injector same as the stock mustang injectors just these have 4 holes vs the stock mustang has just one. This post is obviously over your skill level bro I appreciate you tryn to help but it's better to only comment on posts you know what your talking about
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