Continental Motors TSIO-520-BE Maintenance And Operator's Manual page 121

10-5 FUEL INJECTION SYSTEM TROUBLESHOOTING CHART (continued)
TROUBLE
Engine Will Not Start
With Fuel Flow Gage
Indication
Rough Idle
Poor Acceleration
Engine Runs Rough
Low Fuel Flow Gage
indication
High Fuel Flow Gage
Indication
Fluctuating or Erro-
neous Fuel Flow
Indications
Poor Idle Cut-Off
PROBABLE CAUSE
No fuel to engine.
Nozzle restricted.
Improper idle mixture.
Idle mixture incorrect.
Unmetered fuel pressure too
high.
Worn linkage.
Restricted nozzle.
Improper mixture.
Restricted flow to metering
valve.
Inadequate flow from fuel pump.
Restricted flow beyond
metering valve.
Restricted recirculation passage
in fuel pump.
Vapor in system, excess fuel
temperature.
Air in fuel flow gage line. Leak
at gage connection.
Engine getting fuel.
10-11
CORRECTION
Loosen one line at nozzle. If no
fuel
shows, with fue1
ftow
on gage,
replace fuel manifold valve.
Remove nozzles and clean.
Adjust fuel-air control unit in
accordance with adjustment
procedures.
Adjust fuel-air control unit in
accordance with adjustment
procedures.
Lower unmetered fuel pressure
Replace worn elements of
Remove and clean all nozzles.
Improper pump pressure, replace
pump.
Check mixture control for full
travel. Check for clogged fuel
filters.
Adjust engine-driven fuel pump.
Check for restricted nozzles or
fuel manifold valve. Clean or
replace as required.
Replace engine-driven fuel
pump.
If not cleared with auxiliary
pump, check for clogged ejector
jet in vapor separator cover. aean
only with solvent, no wires.
Repair leak and purge line.
Check mixture control is in lull
idle cut-off. Check auxiliary pump
is OFF. If neither, manifold
valve.