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Thread: LSx Main Harness & GM Oil Pressure Sensor

  1. #1

    Default LSx Main Harness & GM Oil Pressure Sensor

    As I read the description, the Dominator EFI main harness is suppose to work with all stock GM sensors, but the oil pressure sensor plug on the harness does not fit the oil pressure sensor on my '06 Silverado LM7 5.3L. There's an alignment tab inside the plug on the sensor, that doesn't allow the harness connector to fit. What application sending unit do I need to run in this motor, to make it work with the plug on the Holley harness, and has the calibration to make it work? Thanks all. Rob

  2. #2
    Join Date
    Dec 2009
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    Connecticut
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    26,989

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    Quote Originally Posted by mufflerguy View Post
    What application sending unit do I need to run in this motor, to make it work with the plug on the Holley harness, and has the calibration to make it work?
    Use the Holley 554-102 pressure transducer. You'll be glad you did. Or replace the oil pressure sensor harness connector.
    https://forums.holley.com/showthread...4624#post74624 (Related Forum Thread)
    http://www.yellowbullet.com/forum/sh....php?t=1003506 (Related Forum Thread)

    http://www.autometer.com/1-8-npt-to-...-pressure.html (Auto Meter 2268 LSx Oil Pressure Sensor Adapter Fitting)
    https://www.holley.com/products/ls_p...arts/LT0001ERL (Earl's LT0001ERL LT/⅛" Oil Pressure Gauge Adapter Fitting)
    https://www.holley.com/products/ls_p...arts/LS0021ERL (Earl's LS0021ERL LSx/⅛" Oil Pressure Gauge Adapter Fitting)
    https://www.holley.com/products/ls_p...rts/9919AFJERL (Earl's 9919AFJERL LSx/-3AN Oil Pressure Gauge Adapter Fitting)
    https://www.holley.com/products/ls_p...rts/9919BFJERL (Earl's 9919BFJERL LSx/-4AN Oil Pressure Gauge Adapter Fitting)

    The fuel & oil pressure transducers are completely optional. The engine runs the same with or without them.
    The fuel & oil pressure transducers are used for Data Monitoring, Data Logging and setup Outputs based on fuel & oil pressure.
    They're "plug & play" into the main harness, and you'll eventually want to use them. And they don't consume any Custom I/O either.

    This is not to be confused with the "Actual System Pressure" fuel parameter (in Engine Parameters),
    which must be entered accurately, because the ECU does use this single value for lb/hr calculations.

    Ensure the fuel pressure is properly adjusted and the "Actual System Pressure" (Terminator - "Fuel Pres") is accurately entered in Engine Parameters.
    With TBI, the Actual System Pressure is measured anytime engine is running (no vacuum reference hose), or key-on/engine-off pump running.
    With MPFI, the Actual System Pressure is measured with the vacuum reference hose temporarily disconnected, or key-on/engine-off pump running.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 M/T Street Comp tires.

  3. #3
    Join Date
    Nov 2013
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    Chicago IL
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    If I remember correctly, the harness connector is for the 3-wire oil pressure sensor from an LS1 Corvette. Try a 2002 Corvette sensor.
    -Scott
    Don't forget to check out progress on my Race Car:
    Project Blasphemy - 8.07 @ 171
    Low 8 Second Street Car

  4. #4

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    Old thread, but I thought this might help someone:
    https://www.wiringspecialties.com/ls...connector-car/

  5. #5

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    Use oil pressure sender: ACDelco D1846A.
    IG @projectgattago
    I offer remote Holley EFI tuning.
    I deliver what EFI promises.
    Please get in touch if I can be of service.

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