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Home >> Ford >> 1998 >> Econoline E350, Van Cargo Extended, 7.3 F >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing - 7.3L Diesel >> Engine Performance Diagnosis >> Boost Pressure Test >> Without New Generation Star (NGS) Scan Tool
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Without New Generation Star (NGS) Scan Tool

  1. Ensure engine is at normal operating temperature. Disconnect Manifold Absolute Pressure (MAP) sensor hose at intake manifold. Install a "T" fitting between MAP sensor hose and hose nipple at manifold. Connect a 0-30 psi (0-207 kPa) gauge to "T" fitting.
  2. Ensure hose is long enough so gauge can be put inside cab of vehicle. Road test vehicle. Observe pressure gauge and accelerate vehicle to achieve highest boost level (2500-3500 RPM). Note pressure reading. Boost level will level out after 3000 RPM. If boost pressure is 13 psi (90 kPa) or more, boost level is okay. If boost level is not okay, see DIAGNOSTIC AIDS.
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