Delphi Multec 3.5 - Factors Affecting Engine Diagnostics

Multec 3.5 Fuel Injector Application Manual Software
Delphi Energy and Chassis Systems
Revision: 11/05-1 5-19
5.3.6 Factors Affecting Engine Diagnostics
• Air calculations
• Temperature
• Manifold pressure
• System voltage errors (voltage drop due to vehicle wiring)
• Gain consideration (electrical and mechanical)
• Adequate fuel system capacity
• Actual volumetric efficiency may be different
• Canister purge rates
• Injector sensitivity
− Spray
− Targeting
− Injector temperature
− Manifold pressure
− System pressure dynamics
− Pressure gain of system (especially with remote mounted fuel
pressure regulators)
− Fuel type