Daq system or, Data logger – Fuelab 52902 Electronic Fuel Pressure Regulator User Manual

Page 5

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IGNITION

SWITCH

From

+12V

Source

White (16-20ga)

Black (16-20ga)

Red (16-20ga)

Green

(16-20ga)

Insulate this

wire, if not

in use.

Fused Circuit

(1-5A)

Electronic Regulator

Model 52902-c

Electrical Plug

and Wire

(Supplied)

109020122-1, No Rev Sheet 5 of 6

TROUBLESHOOTING:

DAQ System or

Signal Input

Data Logger

Device (Not Supplied) is

not required, however can

be used to track general

fuel system output.

Compatible with

Fuelab Prodigy Series

Fuel Pump(s) ONLY!

(Not Supplied)

See Prodigy Instructions

for Proper Power Connections

Electrical Planning Notes:
Use Male Connector with wire (Provided with Regulator), to allow a sealed electrical connection to the Electronic
Regulator. The regulator requires very little power, and does not control the input power to the fuel pump. Follow
the Wiring Schematic Diagram provided with the Fuelab Prodigy Series Fuel Pump, to properly wire power and
ground leads to pump.

Electrical Wiring Schematic (Less Power Supply and Ground to Pump):

Problem Possible

Cause

Possible

Solution

Not operating or
slight “clicking”
sound from pump
when turned on.

• Faulty fuel pump relay.
• Faulty,

dirty

corroded

terminals or improperly sized
wire.

• Debris from tank or plumbing

lodged inside pump.

Check voltage to fuel pump, at power terminals. If
voltage is steady and consistent (within ½ Volt of
battery) then contact Fuelab for repair. If voltage
is inconsistent as described, repair or replace
electrical components as required.

Speed of pump
changes up and
down very
noticeably and
erratically.

• Incorrect wiring of speed control

as specified in wiring schematic.

• Loose terminal or wiring of

speed control circuit.

Unhook speed control wiring from yellow terminal
of pump. Turn on pump; if operation is consistent,
then repair or replace components as required.

Loss of fuel
pressure or erratic
pressure pulsation
after several
minutes of
operation.

• Cavitation (vapor lock) due to

overheating or restricted inlet.

Check temperature of pump right after failure. If
pump is hot to touch (cannot leave hand on pump
due to it being too hot), then follow proper speed
control wiring example, or look for other sources
of heat such as exhaust. If pump is not hot to the
touch, check for inlet restrictions such as
improperly vented tank, kinks in the fuel line, or
too small of plumbing for application. Contact
Fuelab, as pump may be damaged due to
improper operating condition.

Not building up fuel
pressure.

• Incorrect fuel system initial

priming procedure.

• Loose inlet fuel fittings or

leaking plumbing on inlet side.

Repeat procedure for proper priming. If condition
continues, check all plumbing upstream (on inlet
side) of fuel pump.

Fuel pressure
drops off under
heavy engine load,
particularly in
higher gears.