Navistar N10

401DIAGNOSTICTROUBLESHOOTINGPROCEDURES
8.0-FuelSystemOperationalCheckoutProcedure
Step1Performpreliminaryoperationalcheckoutprocedure.Decision
DidyouPerform1.0PreliminaryVehicleOperationalCheckoutProcedure(page23)?
Yes:GotoStep2.
No:Goto1.0Preliminary
VehicleOperational
CheckoutProcedure(page
23).
Step2Determineifenginehasafueldeliveryproblem.Decision
PerformFuelDeliveryPressure(FDP)Test(page2273).
Isfuelpressurebetween60and100psi?
Yes:GotoStep3.
No:Goto8.1FuelDelivery
Pressure(page120).
Step3Determineifenginehasfuelintheengineoil.Decision
Lookforengineoiloverfull¾“ormoreandsmellslikefuel.
Isfuelintheengineoil?
Yes:GotoFuelinEngine
Oil(page124).
No:Reviewoperator
complaint.