Diagnostic Notes

This section is used to find correct test procedure for a symptoms which are FUEL RELATED ONLY. Verify system application to ensure that vehicle is equipped with component in question.

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.
^ 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 alcohols are used in commercial fuel. Some alcohols are more detrimental than others. If an excessive amount of alcohol suspected as the cause of a driveability condition, refer to ALCOHOL-IN-FUEL TEST. In this procedure, water is used to extract alcohol from fuel.

FUEL TYPES
^ METHYL TERTIARY-BUTYL ETHER (MTBE)
Fuel containing Methyl Tertiary-butyl Ether (MTBE) may be used, providing there is no more than 15% alcohol by volume.
^ ETHANOL
Fuel containing ethanol (ethyl) or grain alcohol may be used, providing there is no more than 10% ethanol alcohol by volume.
^ METHANOL
Fuel containing methanol (methyl) or wood alcohol may be used, providing there is no more than 5% methanol by volume. Use of fuel (gasohol) that contains more than 5% methanol can corrode metal fuel system components and damage plastic and rubber parts.


PRE-CHECKS
^ Check for adequate fuel supply in fuel tank. DO NOT RELY ON FUEL GAUGE!
^ Verify battery is fully charged.
^ Verify fuse/fuse link integrity.
^ Inspect all hoses, fuel lines, and connections for leaks, kinks and proper routing.
^ Verify correct fuel type and quality.
^ Check TSB's for fuel system design updates.