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ILLUSTRATED PARTS LIST:

Electronic Control Unit

P/N 534-55

TOOLS / ADDITIONAL MATERIALS REQUIRED FOR INSTALLATION:

The following tools and materials are required to complete the installation:

  Electric Drill 

  Digital Volt / Ohm Meter (10 Megohm)

  Miscellaneous Hardware

MOUNTING THE ELECTRONIC CONTROL UNIT (ECU):

DANGER! ALWAYS DISCONNECT YOUR VEHICLE’S BATTERY BEFORE PERFORMING ANY WORK ON THE VEHICLE’S

ELECTRICAL OR FUEL SYSTEM.  FAILURE TO DO SO MAY PRODUCE SPARKS, CAUSING A FIRE OR
EXPLOSION, RESULTING IN PROPERTY DAMAGE, PERSONAL INJURY, AND/OR DEATH.

WARNING! Do not open the ECU.  The digital electronics contained within this ECU are sensitive to static electricity.  Opening

this ECU WILL VOID THE WARRANTY.

WARNING! Do not mount the ECU in an enclosed area such as the glove compartment.  Mount the ECU in an area that will

allow air to flow freely across the ECU to dissipate heat generated by the ECU.

WARNING! When mounting the ECU, care must be taken that none of your vehicle’s other systems, such as the electrical

system, air conditioning, or heating components, are damaged by either drilling holes or using mounting screws.
Always check on the other side of the location that is to be drilled to ensure that no damage will occur.

WARNING! Do NOT mount the ECU in the engine compartment.  The ECU is not designed for the environment (heat, moisture)

present in the engine compartment.  Premature failure of the ECU will result.

WARNING! The 

PRO-JECTION 

2D system must be appropriately grounded to ensure proper system performance and to

prevent any damage to the system.  To ensure a good grounding plane, connect a ground strap between the
engine and the chassis.

The digital ECU is designed to operate in either a small block or a big block mode.  The mode in which this ECU operates is selected by
connecting one of the wires in the wiring harness to either ground or a switched positive (+) 12 volt source.  Further instructions relative
to this selection are located in P/N 199R-9777-6.

NOTE:

  All connections shown MUST be made in order for the 

PRO-JECTION 

2D 

system to operate properly.

1.  Pick a suitable location on the interior of the vehicle in which the ECU can be mounted.  Ensure that the mounting location allows

for sufficient length of the wiring harness and clearance for connectors and that the adjustment knobs on the front of the ECU are
accessible before mounting the ECU.

2.  Using the ECU base plate as a template, drill 4 pilot holes, ensuring that no damage will result to any of your vehicle’s other

systems.

3.  Mount the ECU with 4 self-starting sheet metal screws (not included).

Содержание 534-55

Страница 1: ...osed Loop Kit for Digital Replacement ECU 534 50 Rich Lean Indicator without O2 Sensor 534 51 Rich Lean Indicator with O2 Sensor 534 56 Replacement Closed Loop Kit Harness NOTE These instructions must...

Страница 2: ...THE ENGINE 7 SETTING THE MECHANICAL IDLE 7 SETTING THE THROTTLE POSITION SENSOR TPS 8 TUNING THE DIGITAL ECU FOR PERFORMANCE 9 Tuning the Main 9 Tuning the Idle 10 Tuning the Accel 10 Tuning the High...

Страница 3: ...various operating conditions is user adjustable through the use of five adjustments knobs located on the front panel of the digital ECU These adjustment knobs are used to tune the system WARNING The...

Страница 4: ...d to ensure that no damage will occur WARNING Do NOT mount the ECU in the engine compartment The ECU is not designed for the environment heat moisture present in the engine compartment Premature failu...

Страница 5: ...l lines and to build pressure in the fuel injection system The digital ECU senses whether the pink wire in the harness is attached to switched 12 volts or to ground The ECU then internally selects whe...

Страница 6: ...allows the user to adjust the fuel delivery in the idle region of the fuel map 30 above or below the values that are set at the factory This is accomplished by moving the lower part of the fuel map e...

Страница 7: ...ensure that they were not moved If necessary rotate the potentiometers so that they are positioned as shown in Figure 3 5 Turn the ignition key to the RUN position DO NOT START THE ENGINE Listen for...

Страница 8: ...must be set in the position outlined below 1 Unplug the three position connector from the TPS and attach jumper wires between the TPS and the connector 2 Remove a portion of the insulation on the jum...

Страница 9: ...U is critical in the operation of the fuel injection system and is best accomplished by using a tachometer If your vehicle is not equipped with a tachometer Holley highly recommends one be used To adj...

Страница 10: ...ustments made here allow for a quick crisp response during acceleration WARNING Do not attempt to perform acceleration tests on a busy road or highway Complete this stage of the tuning process in an a...

Страница 11: ...Use of Leaded fuels will DESTROY the oxygen sensor and will result in incorrect exhaust gas oxygen readings WARNING The use of some RTV Silicone sealant will destroy the oxygen sensor Ensure that the...

Страница 12: ...he wiring harness away from any direct sources of heat and moving parts from the oxygen sensor to the rear of the ECU Secure the wiring harness with wire ties or wire clamps 8 Reconnect the primary wi...

Страница 13: ...t stalls after starter motor disengages No voltage to relay switched power input with ignition in RUN position No TACH signal Check switched power connection to relay with ignition in RUN position Che...

Страница 14: ...nd repair wire Replace ECU K Low Fuel Pressure Low Voltage at fuel pump Kinked or restricted fuel line Faulty fuel pump Throttle body pressure regulator improperly adjusted Low fuel level in tank Rest...

Страница 15: ...temperature sensor in boiling water should be approximately 182 k NOTE If the resistance values of your engine coolant temperature sensor do not match these values the temperature sensor must be repla...

Страница 16: ...rminals with no power applied to the relay s coil the relay must be replaced 4 Connect terminal 86 to ground 5 Connect terminal 85 to a positive 12 Volt power source 6 With a digital volt ohm meter ch...

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