29400-01571 PUMP ASSY, SUPPLY Denso Cross

Recommended Procedure With Chassis Dynamometer
Possible Causes/Corrections
1. Check Records Used To Determine Fuel Consumption/Make sure the records are accurate. The minimum period for accurate fuel records is one month or 10,000 miles. Check the tires (air pressure and size), the gap between the tractor and trailer, air deflectors, trailer width, trailer type, engine cooling fan and driver habits. See OWNER/OPERATOR INPUT section for more information on the questions that should be asked.2. Minor Operating Faults/To help identify a problem before a more involved troubleshooting procedure is started, follow the procedure given in the PRIMARY ENGINE CHECKS section.3. Fuel Ratio Control Out of Adjustment or Bad/Follow the procedure in the Testing and Adjusting section of this Service Manual.4. Check Engine Performance/Do a Power Analysis Report (PAR), Level II, to check engine performance. See Special Instruction, Form No. SEHS8025 and SEHS7886 for the tooling and procedures to use. Be sure to make a record of the temperatures for inlet air, fuel (at filter base), lubricating oil and coolant. Also, check for excessive exhaust smoke. At this point, the governor fuel settings should be verified. See the Testing and Adjusting section of this Service