![]() Select VEHICLE & ENGINE SELECTION menu.Perform the necessary vehicle preparation and visual inspection.If vehicle is equipped with an auxiliary powertrain control (rpm control), it must be turned off to perform self tests. If that is the case a second sample may be required to determine fuel quality.Ĭonnect the NGS Tester to the data link connector (DLC) under the dash. Some sediment and water may be present in the fuel sample if the fuel filter has not been serviced for a prolonged period of time and/or if the sediment and water have not been drained recently. If that is suspected, check rail pressure during engine cranking (Hard Start/No Start Diagnostic Procedures Step 9C). If engine oil is present in the fuel it may indicate an injector O-ring leak and subsequent loss of rail pressure. Dyed red or blue fuel indicates off-highway fuel. It also should be free of water and contaminants. It should be straw colored, but not cloudy. Insufficient flow could indicate fuel supply or fuel system problems. If the lamp is illuminated, the fuel is probably contaminated with water.įlow out of the drain should be a steady stream. Observe the WATER IN FUEL lamp while cranking the engine. Stop cranking the engine when the container is half full. Crank the engine and observe the fuel flowing into the container. Route a hose from the fuel drain line to a clear container and open the drain. (A reservoir that drains back after the engine has not been operated for a period of time can cause a hard start and die condition.) Filling the reservoir will allow the system to prime faster facilitating starting. Remove the inspection plug in top of reservoir and check to see if the oil reservoir is full. ![]() The level in the oil reservoir should also be checked. Refer to the lube oil chart in the service manual or operator's manual for the correct oil selection for temperature conditions. Oil that has had extended drain intervals will have increased viscosity (become thicker) and will make engine cranking more difficult and starting less reliable at temperatures below freezing. 10W-30 oil is recommended for cold ambient temperatures. Single weight or 15W-40 oil is not recommended for cold ambient temperatures. ![]() A milky white oil indicates possible coolant contamination and will have an ethylene glycol odor.Ĭheck service records for correct oil type and viscosity for the vehicle operating temperature. Usually if a substantial amount of fuel is in the oil it will have a fuel odor. ![]() If the oil level on the dipstick is overfull it is possible the engine was incorrectly serviced or fuel is diluting the oil and filling the crankcase. If there is no oil or very little oil in the crankcase, the injectors will not operate. Check oil level with dipstick when vehicle is on level ground. ![]()
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