What does the Ignition Control Module do?
#1
What does the Ignition Control Module do?
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.
** Forgot to say that I checked for codes and KOEO I get 111 and sometime 625, and then continuous 512, KOER I get 111.
Last edited by jv2290; 01-05-2011 at 06:00 PM. Reason: Forgot to add info
#2
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.
** Forgot to say that I checked for codes and KOEO I get 111 and sometime 625, and then continuous 512, KOER I get 111.
Some good reading here on ICMs: http://www.msextra.com/doc/ms1extra/...n-tfi-edit.doc
#3
#4
You may have the wrong ICM installed. It should be black in color. Take a look at post#9 in this thread: https://www.ford-trucks.com/forums/1...-stranded.html
Some good reading here on ICMs: http://www.msextra.com/doc/ms1extra/...n-tfi-edit.doc
Some good reading here on ICMs: http://www.msextra.com/doc/ms1extra/...n-tfi-edit.doc
The last link didn't work
#7
Coolant sensors are new. I'm wondering if it's a dirty connection at the PCM. I just didn't know if the ICM is what controls the spark and timing. It seems like the coil cuts off. Strange thing is if I take off the starter relay wire and hold it in start it runs great! So I don't know haha
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#8
#9
Try this: Index of /doc/ms1extra/MS_Extra_Hardware_Manual_files
Then scroll down and select "ford-Ignition-tfi-edit.doc"
Then scroll down and select "ford-Ignition-tfi-edit.doc"
#10
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.
** Forgot to say that I checked for codes and KOEO I get 111 and sometime 625, and then continuous 512, KOER I get 111.
#11
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.
** Forgot to say that I checked for codes and KOEO I get 111 and sometime 625, and then continuous 512, KOER I get 111.
#12
What do you mean by " hold it in start it runs great!" ?
Define "it" ?
The starter relay wire is also the Start position power to the TFI Ignition Module, ICM. There is a potential for the starter relay wire to bleed the ICM to ground after the engine is started and the Ignition Switch returns to the on position from Start. Removing the starter relay wire removes the ground path.
Man, there was a guy out here last week with a similar issue, I don't remember seeing a resolution....
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