Navistar MaxxForce 15 - 4.6. GRAPH 6: ERRATIC EXHAUST GAS TEMPERATURES; Graph Analysis:

DIAGNOSTICMANUAL
4.4.GRAPH4:0TO60MPHTEST(ENGINESPEED,ENGINELOAD,IMP ,EBP ,AND
APP1)
1.AcceleratorPedalPosition1
(APP1)(percent)[Orange]
2.ExhaustBackPressure(EBP)
(psi)[Red]
3.Engineload(percent)[Blue]
4.Enginespeed(rpm)[Green}
5.IntakeManifoldPressure(IMP)
(psi)[Purple]
Figure8Graph4:0to60MPHTest(EngineSpeed,EngineLoad,IMP ,EBP ,andAPP1)
GraphAnalysis
ThisgraphshowstheIntakeManifoldPressure(IMP)signalvalueoperatingasdesigned.Thistestdoesnot
givepassorfailresults.ItonlyallowstheusertovalidatetheIMPsignalvalueunderload.AcceleratorPedal
Position1(APP1)signalvaluemustbe99.6%tosuccessfullyreachpeakboostduringthistest.LowIMP
canbetheresultoflowInjectionControlPressure(ICP).DiagnoselowICPconcernsbeforediagnosing
lowIMPconcerns.
55
https://www.truck-manuals.net/