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Thread: Installing a VSS Sensor with Holley EFI

  1. #111

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    Hello. I have a question in regards to this post. I found this and it looks like the solution I was looking for, but no luck so far. I have a Holley Dominator & Tremec 6 speed transmission with reverse lockout. My original intention was to send the VSS sensor & ground to the 558-400 Auxiliary Harness as described, in order to provide and input for the Holley EFI 553-122 CAN speedometer. In discussions with Holley Tech, this is not possible for the speedometer to read VSS information. It is only available through the J4 plug directly from 4L80E or 4L60E transmission. I see this post was listed some time ago, and I was wondering if at that time, the Digital Dash was capable of reading the VSS signal. Do you have any suggestions on how to output my 16 PPR signal to the Dominator in order to send signal to the CAN speedometer? Thanks.

  2. #112

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    You can do all this by getting the J4 ECU side connector and move the pin from the 558-400 (on the ECU side) to the appropriate pin on the J4 connector. I then created a custom speed input and assign it to that pin (I forget the exact one). I also have a custom output that powers the reverse lockout solenoid. It's programmed to active below 5 MPH, like OEM. This information is then fed to the 7" Digital Dash, via CAN. Andrew

  3. #113
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    http://forums.holley.com/showthread....0291#post30291 (Speedometer Output Info - Dominator ECU/Transmission ICF)
    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

  4. #114

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    Quote Originally Posted by andrewb70 View Post
    You can do all this by getting the J4 ECU side connector and move the pin from the 558-400 (on the ECU side) to the appropriate pin on the J4 connector. I then created a custom speed input and assign it to that pin (I forget the exact one). I also have a custom output that powers the reverse lockout solenoid. It's programmed to active below 5 MPH, like OEM. This information is then fed to the 7" Digital Dash, via CAN. Andrew
    Andrew, so I've added the transmission configuration and enabled the output as PWM+ per previous comments, then assigned that output to B11 on the J1 P+ Speedo. I then created the VSS signal input DIGITALSPEED/FREQ & VSS GROUND and assigned to J1/A12 & J1/A13. I have the J4 connector and now I understand that I need to take the white/blue A12 and the white/black A13 from the 558-400 harness, and connect those to the B18 & B14 on the J4 connector. Am I doing this correctly? Then for reverse lockout I can create a new output and assign that to the B12/gray/yellow on the 558-400 harness and connect that to my reverse lockout module? (It only needs signal not reference?) Thanks.

  5. #115

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    Quote Originally Posted by jnickelboy View Post
    Hello. I have a question in regards to this post. I found this and it looks like the solution I was looking for, but no luck so far. I have a Holley Dominator & Tremec 6 speed transmission with reverse lockout. My original intention was to send the VSS sensor & ground to the 558-400 Auxiliary Harness as described, in order to provide and input for the Holley EFI 553-122 CAN speedometer. In discussions with Holley Tech, this is not possible for the speedometer to read VSS information. It is only available through the J4 plug directly from L480 or L460 transmission. I see this post was post was listed some time ago, and I was wondering if at that time, the Digital Dash was capable of reading the VSS signal. Do you have any suggestions on how to output my 16 PPR signal to the Dominator in order to send signal to the CAN speedometer? Thanks.
    Can I still do this with a Terminator LS? I was incorrect in my statement about the Dominator.

  6. #116
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    Only the Dominator ECU has electronic transmission control (J4 ECU connector).
    http://forums.holley.com/showthread....0291#post30291 (Speedometer Output Info - Dominator ECU/Transmission ICF)
    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

  7. #117

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    Danny, I think that the Terminator LS is the same as Dominator because I do have the J1-J4 ports. I think I'm on the same page as you & Andrew were, and here's my diagram. Am I on the right page? I'm unsure of the PTA/PPROT, but intend to see if I get signal from this. I have the same 558-400 & 558-401 and the J4 plug and intend to wire accordingly. I did purchase a Dakota Digital Speedo Interface and had a 2.35 program output, but I don't think I need that with this setup. I can just read the Tremec VSS at 17 pulses or 58000 pulses per mile, correct?
    Attachment 3559
    That picture did not come across very well. Let me try again. https://missionglassllc-my.sharepoin...PJXcg?e=Xpq3Ib

    I'm sure that the Terminator LS has the transmission control as those configurations are available in the EFI software. After trying all of the above no speedometer. Am I crazy, or just missing something?

  8. #118
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    Dec 2009
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    Connecticut
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    Yes, the Terminator LS uses the same HP or Dominator ECU. I don't know why your speedometer isn't working.
    http://forums.holley.com/showthread....0291#post30291 (Speedometer Output Info - Dominator ECU/Transmission ICF)
    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

  9. #119

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    VSS - IPU SPEED/FREQUENCY - My initial settings are (Type-MPH, Minimum Voltage .00V, Pulses 17, PPROT 17, Gear Ratio 3.73, Tire Diameter 26.6" for 275/40/18, and have not setup any display values or enabled any Caution or Output.
    TRANSMISSION SPEED CALCULATION - Tire Diameter 26.6", Rear Gear Ratio 3.73, and enabled Speedometer Output at 1 PPMILE. Do I need to have the PPMILE at 58500 for the Magnum? It only allows max of 9999 PPMILE?

  10. #120
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    Quote Originally Posted by jnickelboy View Post
    VSS - IPU SPEED/FREQUENCY - My initial settings are...
    The Speedometer Output in the Transmission ICF doesn't involve the Inputs/Outputs ICF.
    However, the Digital Dash can display speed from a custom VSS from the Inputs/Outputs ICF.
    http://forums.holley.com/showthread....0291#post30291 (Speedometer Output Info - Dominator ECU/Transmission ICF)

    ...and enabled Speedometer Output at 1 PPMILE.
    Well, that's not going to work.

    Do I need to have the PPMILE at 58500 for the Magnum?
    I don't know what your specific application values should be.

    It only allows max of 9999 PPMILE?
    The latest version of V4 software/firmware allows 99,999 Pulses Per Mile.
    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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