90-823225--1 10965E-134 - ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY)
POOR FUEL ECONOMY
Definition: Fuel economy is noticeably lower than expected.
PRELIMINARY CHECKS
Perform the important preliminary checks as described at the start of “Troubleshooting” section.
1. Operator’s driving habits.
2. Dirty or plugged flame arrestor.
3. Fuel leaks.
CHECK FUEL SYSTEM FOR:
1. Quality and type of fuel.
2. Flooded VST.
3. Fuel pressure within specification.
CHECK IGNITION SYSTEM FOR:
1. Correct base timing.
2. Properly functioning (advancing and retarding of timing) Ignition Control (IC).
3. Fuel fouled, cracked, worn, improperly gapped spark plugs, burned electrodes, or heavy depos-
its. Repair or replace as necessary.
4. Knock sensor system operation.
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