Diagnostic Notes (Read Before Proceeding)

This section is used to find the correct test procedure for a given symptom. The symptoms and actions in this section are FUEL RELATED ONLY. Always use the FLOW OF DIAGNOSIS for proper testing sequence. Verify the correct system application to ensure that the vehicle has the given component.
ALCOHOL-IN-FUEL
Alcohol in fuel can be detrimental to fuel system components and may cause driveability problems such as hesitation, lack of power, stall, no start, etc.
The problems may be due to fuel system corrosion and subsequent fuel filter plugging, deterioration of rubber components and/or air/fuel mixture leaning.
Various types and concentrations of alcohol are used in commercial fuel. Some alcohols are more detrimental to fuel system components than others. If an excessive amount of alcohol in the fuel system is suspected as the cause of a driveability condition, refer to " ALCOHOL-IN-FUEL-TEST". In this procedure water is used to extract the alcohol from the fuel.
FUEL TYPES
ETHANOL
Fuel containing ethanol (ethyl) or grain alcohol may be used provided there is no more than 10% ethanol alcohol by volume.
METHANOL
Fuel containing methanol (methyl) or wood alcohol may not be used. Use of methanol gasoline blends may result in starting and driveability deterioration and damage to critical fuel system components.
PRE-CHECKS:
1. Check for adequate fuel supply in fuel tank. DO NOT RELY ON FUEL GAUGE!
2. Verify battery is fully charged.
3. Verify fuse/fuse link integrity.
4. Inspect all hoses, fuel lines, and connections for fuel leaks, kinks and proper routing.
5. Verify correct fuel type and quality.
6. Check TSB's for fuel system design updates.