Originally Posted by jv2290

I have a 1992 F250 with a 5.0 & E4OD transmission. I've been having issues with starting it and I think it's the ICM. The ICM is the fender mount style, gray in color and the number on it is E7DF-12A297-A1A. My question is, what exactly does the ICM do? Are there anyways to test it? I've seen people post that they had them tested and they passed but were still bad. My truck has a very hard time starting only when it's cold out. It was 55 Fahrenheit outside the other day and it started decent. any temp above 65 it'll start great! When it's cold out it runs like crap until it warms up. It acts like it's on 2 cylinders. But once it warms up it's great! I've changed lots such as ECT, O2, IAC, plugs, wires, cap, rotor, coil, exhaust, air filter, TPS, EGR system, and the fuel system tested fine and the parts are new anyway including the filter. It acts like the coil is cutting out and the timing doesn't wanna sit still much. The idle changes randomly and I believe it's because of the timing moving around. I even believe I hear labor knocks / pings as is the timing is too high. I already advanced it and now turned it back down to 10* and still hear sometimes. Is this what the ICM does? I would really like to know EXACTLY what the ICM does just for reference reasons. Thanks In Advance!!


** Forgot to say that I checked for codes and KOEO I get 111 and sometime 625, and then continuous 512, KOER I get 111.