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Thread: Ignition Module Buzz

  1. #11

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    Yes, I'm referring to the EFI system relay. I don't know if this would be considered a run on, because the car does turn off right away when the key is switched to the off position, but the relay stays on for a few seconds afterwards. I think I'm going to install a diode on that relay, and pray that it works. I'm just intrigued that the old ignition module didn't have a problem with this, but any new one does. Have any recommendations? Also, clear the Learn Table on a Commander 950 Pro?
    Last edited by Sneddon; 02-01-2017 at 10:49 PM.

  2. #12
    Join Date
    Dec 2009
    Location
    Connecticut
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    14,020

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    Quote Originally Posted by Sneddon View Post
    Also, clear the Learn Table on a Commander 950 Pro?
    Oops, I'm thinking the Holley HP/Dominator EFI. You may have a defective Commander 950 ECU.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, Lentech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #13

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    So after tracing wires in a rats nest that the previous owner made, the trigger wire for the relay that's staying on, is indeed the Green/Black wire for the fuel pump prime on the ECU. Does this mean my ECU is defective? Would I be able to just switch that relay over to an ignition trigger, so it's always on when the car ignition is on, and just get around the ECU being weird?

  4. #14
    Join Date
    Dec 2009
    Location
    Connecticut
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    14,020

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    Quote Originally Posted by Sneddon View Post
    Does this mean my ECU is defective?
    That circuit of the ECU is probably defective.

    Would I be able to just switch that relay over to an ignition trigger, so it's always on when the car ignition is on, and just get around the ECU being weird?
    You could do that. I'd upgrade with a Holley HP ECU & Harness Kit (LINK).
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, Lentech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

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