FUEL CONTAMINATION

If an engine's fuel supply has been contaminated, the following procedure must be followed:

NOTE: Dispose of Petroleum based products in a manner consistent with State, Federal, and Provincial Regulations.

The engine should then be evaluated to determine if the contaminated fuel has caused any damage to the fuel system and or engine. Indicators that the fuel system and or engine has been damaged are the following:

• Unstable fuel rail pressure. This can manifest itself as instability at idle speeds, excessive undershoot/overshoot at engine start, or excessive undershoot/overshoot when the engine operating conditions change. A typical engine response to a large rail pressure undershoot would be a decrease in engine speed or engine stall.
• Excessive noise from the engine. This could indicate poor rail pressure control or the inability of the injection system to inject the proper amount of fuel.
• Excessive smoke (black or white). This could indicate inability of the fuel system to inject the proper amount of fuel.

NOTE: If any of these conditions are exhibited after cleaning the fuel system, proceed to the appropriate fuel system information. Repair fuel system and or engine as necessary.