47
EFI USING INSTRUCTION
Troubleshooting and counteractions
Symptom
Cause
Counteraction
Engine won’t start
or stops working.
No fuel flows out of fuel
pump injector
Fuel level is too low
Refill fuel
Pump fuel doesn’t work
Check the fuse and pump relay
No apparent cause (fuel pump works and fuel
flow is sufficient)
Check for kinks in fuel hose
Poor fuel pump contact
Check and re-insert connector
Fuel pump works, high
voltage cable works
Low battery voltage is causing low fuel pressure
and low winding discharge voltage
Charge or replace battery
Spark plug carbon deposits or wrong spark plug
gaps
Clean carbon deposits or adjust spark plug
gaps
Fuel hose leaks causing reduced fuel pressure
Check fuel hose
High voltage cable does
not work
Ignition coil input “+” terminal has no voltage
Check fuse
Poor contact of ignition coil inserts
Check ignition coil inserts
Idling speed not stable
Fuel pressure too low
Check fuel pressure
Stepping motor seat leaks
Check the stepping motor to see whether
it is tightened or not
Idling speed too high
IACV Stepping motor valve stuck
Check stepping motor seat to see
whether there are impurities and motor
troubles or not
No power
Fuel pressure too low
Check fuel pressure