Navistar MaxxForce 13 User Manual

DIAGNOSTICMANUAL
WARNING
Topreventpersonalinjuryordeath,donotexceedlocalspeedlimitlawsordrivetoofast
forconditionswhenperformingLugDownTest.
Step
ActionDecision
8A
UsingEST,gotoSessions>Performance.Findanopen
stretchofroadinordertoperformLugDownTest.When
drivingconditionsaresafe,selecttherecordsnapshoticon
fromthetoolbar,andperformLugDownprocedurebelow:
1.Selectasuitablehighrangegear(Example:In
a10speedgearbox,selectthe8thspeed).
2.Allowenginespeedtodropto1000rpm.
3.Pressacceleratorpedalfullytotheoor,and
acceleratetoratedenginespeed.
AfterLugDownTestiscomplete,stoprecordingandsave
snapshot.
Gotostep8B
Step
ActionDecision
8B
Checkforlowfuelrailpressure.UsingESTwith
ServiceMaxx™software,usetheplaybackfeatureand
graphthefollowingsignalvaluesfromLugDownT est:
SignalValues:
•EngineSpeed
•FuelRailPressure(FRP)
•FuelRailPressureDesired(FRPD)
ComparesnapshottoGraph3andassociatedGraph
Analysispage124.
IsFRPsignaloperatingasperGraph3GraphAnalysis?
Yes:Gotostep8C
No:Diagnoseandrepairlowfuelrail
pressure(SeePerformanceDiagnostics
sectioninEngineDiagnosticManual).
Afterrepairsarecomplete,retestfor
originalproblem.
99
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Navistar MaxxForce 13 Specifications

General

Brand	Navistar
Model	MaxxForce 13
Category	Engine
Language	English