ICM - ignition control module
03-04-2016, 01:43 PM
#1
ICM - ignition control module
I have a 76 Cordoba -400cid 2 barrel. The ICM - Ignition Control Module or ECM listed for that car is 8A1 from Rock Auto / AIRTEX. The website picture shows 5 pins for the plug. My old (bad) one has 5 pins. They sent me one with 4 pins. I cannot find a 5 pin module anywhere. I have looked at NAPA, Year One, Summit, Parts Geek and Rock Auto. I dont believe anyone makes it. The 5 pin is used in conjunction with a 4 prong ballast. at low idle- one set of prongs is used and at high speed the other set is used. I am the only one needing a 5 pin ?
I am wondering if the 4 pin could be used with some alterations. THANX
Ed Scotch
I am wondering if the 4 pin could be used with some alterations. THANX
Ed Scotch
03-04-2016, 02:29 PM
#2
Mopar Lover
Ummmm..How do you figure you have to have a 5 pin?????.. All that happened was they took one of the wires away from the ballast resister in Crank Mode... You can run the 4 pin with no issues....
Last edited by RacerHog; 03-04-2016 at 02:32 PM.
The following users liked this post:
scotch (03-06-2016)
03-04-2016, 03:20 PM
#3
Super Moderator
Bob your a tough ,aren't you still on the clock!
03-05-2016, 11:02 AM
#5
Super Moderator
03-06-2016, 11:30 AM
#6
You don't need a 5 pin. "What Ma did" was to eliminate the need for the second half of the 4 pin ballast by redesigning the ECU. It now gets it's power through another pin.
A side note..........Whether a 4 or 5 pin OR POINTS, the COIL side of the resistor is basically unchanged. What this means is, in an emergency, you could carry an old points distributor and drop it in. Simply disconnect the coil NEG wire, hook up the distributor, and drive off.
This shows the difference. The second half of the resistor simply does not need to be there The wire at far top right labeled "existing wire" is the dark blue "ignition run." The brown resistor start/ bypass circuit is not shown. These diagrams are labeled poorly because they were drawn in relation to a conversion. In the top diagram, the "new wire" at far left and the left side of the resistor, is the part of the circuit which ORIGINALLY powered the 5 pin box
A side note..........Whether a 4 or 5 pin OR POINTS, the COIL side of the resistor is basically unchanged. What this means is, in an emergency, you could carry an old points distributor and drop it in. Simply disconnect the coil NEG wire, hook up the distributor, and drive off.
This shows the difference. The second half of the resistor simply does not need to be there The wire at far top right labeled "existing wire" is the dark blue "ignition run." The brown resistor start/ bypass circuit is not shown. These diagrams are labeled poorly because they were drawn in relation to a conversion. In the top diagram, the "new wire" at far left and the left side of the resistor, is the part of the circuit which ORIGINALLY powered the 5 pin box
Last edited by DDodger; 03-06-2016 at 11:34 AM.
The following users liked this post:
scotch (03-06-2016)
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