Fuel Pump: Testing and Inspection

ALLDATA EDITORS NOTE

"When troubleshooting a 1998.5 - 2004 Ram Diesel equipped with a retrofit Electric In-Tank Fuel Transfer Pump, transfer pump flow, NOT PRESSURE, is the indicator of a good or bad transfer pump. All aftermarket devices used to identify low fuel pressure are incompatible with the retrofit Electric In-Tank Transfer Pump and should be disregarded. For testing information and specifications for the retrofit Electric In-Tank Fuel Transfer Pump, refer to 2005 Ram Diesel information in the ALLDATA system".

Tests 1232 - 1236:

Tests 1237 - 1239:

SYMPTOM
* CHECKING FUEL DELIVERY (DIESEL)

POSSIBLE CAUSES
- Fuel line leaks, kinks or restricted
- Fuel filter defective
- Transfer pump defective
- Engine control module defective
- Fuel supply line restriction
- Supply line or fuel tank module defective