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LP Engine G430 (3.0L)
Troubleshooting
Problem
Probable Cause
Probable Solution
Poor High Speed
Restricted exhaust system
Check exhaust system
Performance/Lean
●
Measure exhaust back-pressure
Condition
●
Compare to specs
Engine mechanical
See Troubleshooting section
Excessive Fuel
Carburetor malfunction
Check carburetor
Consumption/LPG
●
Remove air/gas valve assembly
Exhaust Smell/Closed
●
Clean air/gas valve and carb throat
Loop System Not
●
Check diaphragm for holes/damage
Working
●
Check air/gas valve for wear/damage
●
Repair/replace as required
Incorrect ignition timing
Check ignition timing
setting
●
Measure timing @ time position
●
Measure timing advance @ run position
Incorrect full load air/fuel duty
Verify full load air/fuel duty cycle
cycle
Engine mechanical
See Troubleshooting section
Pressure regulator
Test pressure regulator operation
malfunction
●
Use test kit
●
Install primary pressure gauge
●
Install secondary pressure gauge
●
Crank engine and observe readings on
pressure gauges
●
Compare readings to specifications
●
If readings are out of spec repair/replace
pressure regulator
Air filter clogged
Check air filter
●
Clean/replace as required
Weak ignition miss fire
See ignition system
Vacuum Leak
Replace fuel system vacuum hoses
Fuel pressure too high
Replace/rebuild regulator.
Exhaust system leaks
Repair exhaust system
Oxygen sensor failure
Replace/reconnect oxygen sensor
FCV failure
Replace/reconnect FCV
Commander failure
Replace/reconnect commander
