Operation Section
60
Problem Probable
Cause
Corrective
Action
Fuel Lock-off malfunction
Repair/replace Fuel Lock-off
z
See Engine Service Manual
Faulty vapor connection between
the pressure regulator/converter
and the mixer
Check connection
z
Verify no holes in hose
z
Clamps must be tight
z
Look for kinked, pinched and/or
collapsed hose
Pressure regulator freezes
Check level in cooling system
z
Must be full, check coolant strength
z
-35F minimum
z
Check coolant hoses
z
Watch for kinks and/or pinched hoses
z
Verify one pressure hose and one
return hose
Pressure regulator malfunction
Test pressure regulator operation
z
See Engine Service Manual
Vacuum leak
Check for vacuum leaks
z
Between mixer and throttle body
z
Between throttle body and intake
manifold
z
Between intake manifold and cylinder
head
Air/Fuel Mixer malfunction
Check mixer
z
See Engine Service Manual
Engine Stalls
Engine Mechanical
See Engine Manufacturers Service Manual
Faulty vapor connection between
the pressure regulator/converter
and the mixer
Check connection
z
Verify no holes in hose
z
Clamps must be tight
z
Look for kinked, pinched and/or
collapsed hose
Pressure regulator malfunction
Test pressure regulator operation
z
See Engine Service Manual
Vacuum leak
Check for vacuum leaks
z
Between mixer and throttle body
z
Between throttle body and intake
manifold
z
Between intake manifold and cylinder
head
Rough Idle
Air/Fuel Mixer malfunction
Check mixer
z
See Engine Service Manual
