Actron KAL2535 - Manual (Page 5)

CHECKS TO MAKE BEFORE TESTING FUEL SYSTEM
The following items should be checked. Any faults that are found must be corrected before a proper fuel system
test can be performed.
Check for loose or disconnected vacuum lines. Look for coolant or excessive oil leaks. Listen for any audible air leaks,
unusual noises, engine rattles or knocks. Check valve timing and adjustment.
Electrical System
1. If engine won’t start, check for ignition spark. If no
spark is present, service ignition system. The ignition
fires the fuel injector on most systems so that if a spark
plug is not firing, that cylinder’s injector will not be
firing.
2. Observe Check Engine lamps or other computer fault
indicators.
3. Look for broken, disconnected, or arcing ignition wires.
4. Look for disconnected distributor, or arcing cap or
rotor.
5. Check for loose or corroded component grounds.
6. Look for disconnected electrical components.
7. Check battery condition. A weak battery will affect
proper fuel pump delivery or injector triggering.
Battery voltage should be more than 12 volts.
8. Check basic operation of the charging system.
9. Look for loose or corroded battery cables.
Fuel System
1. Make sure fuel tank has sufficient fuel (do not rely on
the fuel gauge).
2. Look for broken, loose, or corroded metal, rubber or
plastic fuel lines.
3. Check for water or other contaminates in fuel.
4. Check condition of fuel system related fuses or
solenoids.
5. Check condition of fuel tank venting systems.
6. Check condition of fuel tank filler cap.
7. On vehicles equipped with inertia switch, check and
make sure switch has not been tripped.
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