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HOMESERVICE MANUALSPLYMOUTH1994GRAND VOYAGER BASE, 31THREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - 3.3L GASOLINENO-START TESTSTEST NS-2A - INSPECTING FUEL SYSTEM
1994 Plymouth Grand Voyager Base, 31TH

Test NS-2A - Inspecting Fuel System

1994 Plymouth Grand Voyager Base, 31THSECTION Test NS-2A - Inspecting Fuel System
WARNING: High fuel pressure may be present in fuel lines. Open fuel system with caution. See FUEL PRESSURE RELEASE  procedure in this article.
  1. Ensure throttle cables are not holding throttle open. If throttle is held open, repair as required. Perform TEST VER-1  . If throttle is not held open, use DRB to read Throttle Position Sensor (TPS) voltage.
  2. If voltage is less than 1.5 volts, go to next step. If voltage is more than 1.5 volts, disconnect TPS connector. Inspect terminals. Repair as required. Perform TEST VER-1. If terminals are okay, replace TPS. Perform TEST VER-1.
  3. If vehicle is not equipped with a factory vehicle theft alarm, go to next step. If vehicle is equipped with factory vehicle theft alarm, use DRB to read theft alarm status. If DRB displays FUEL ON, go to next step. If DRB does not display FUEL ON, see INTRODUCTION in TESTS W/CODES - BODY CONTROL COMPUTER article in the ENGINE PERFORMANCE section.
  4. Using DRB, actuate fuel system. Listen for fuel pump operation at fuel tank. If fuel pump operation cannot be heard, go to TEST NS-5A  . If fuel pump operation can be heard, turn ignition off.
  5. Ensure fuel tank is at least 1/4 full. Release fuel pressure. Install a fuel pressure gauge in fuel supply line. Turn ignition on. Using DRB, actuate fuel system. Read fuel pressure gauge reading.
  6. If fuel pressure is more than 53 psi (3.7 kg/cm2 ), go to TEST NS-4B  . If fuel pressure is not more than 53 psi (3.7 kg/cm2 ), go to next step.
  7. If pressure is less than 43 psi (3.0 kg/cm2 ), go to TEST NS-4A  . If pressure is more than 43 psi (3.0 kg/cm2 ), go to next step.
  8. If vehicle initially started and stalled repeatedly, go to TEST NS-7A  . If vehicle did not initially start and stall repeatedly, go to TEST NS-3A.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.