Graph 4: 0 To 60 Mph Test (Engine Speed, Engine Load, Imp, Ebp, And App1) - Navistar MaxxForce DT Diagnostic Manual

4.4. GRAPH 4: 0 TO 60 MPH TEST (ENGINE SPEED, ENGINE LOAD, IMP, EBP, AND
APP1)
1. Accelerator Pedal Position 1
(APP1) (percent) [Orange]
2. Exhaust Back Pressure (EBP)
(psi) [Red]
Figure 8 Graph 4: 0 to 60 MPH Test (Engine Speed, Engine Load, IMP, EBP, and APP1)
Graph Analysis
This graph shows the Intake Manifold Pressure (IMP) signal value operating as designed. This test does not
give pass or fail results. It only allows the user to validate the IMP signal value under load. Accelerator Pedal
Position 1 (APP1) signal value must be 99.6% to successfully reach peak boost during this test. Low IMP
can be the result of low Injection Control Pressure (ICP). Diagnose low ICP concerns before diagnosing
low IMP concerns.
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DIAGNOSTIC MANUAL
3. Engine load (percent) [Blue]
4. Engine speed (rpm) [Green}
5. Intake Manifold Pressure (IMP)
(psi) [Purple]
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