Chrysler NS, GS Service Manual – Factory Fuel System Guide

I’ve seen too many guys crack a high-pressure fuel line on a Chrysler NS, GS Service Manual because they grabbed an aftermarket book that guessed the torque. This manual is 56 pages of Chrysler’s own documentation for the fuel system on the NS and GS platforms. It splits the work between the 2.5L diesel and the 2.0L gas engine—two completely different fuel delivery systems under one cover. If you’re pulling an injection pump on a diesel or testing the electric pump on the gas version, you need the factory spec, not a third-party summary.

Fuel System Coverage: 2.5L Diesel and 2.0L Gas

The book opens with separate introductions for each engine. For the 2.5L diesel, you get the fuel tank, fuel filter/water separator, injection pump, injectors, shutdown solenoid, wastegate, and the heater relay. The 2.0L gas side covers the fuel pump module, pressure regulator, quick-connect fittings, and the PCM inputs like the heated oxygen sensor and knock sensor. Every subsection follows the same factory structure—description, operation, diagnosis, service procedures, removal and installation. You don’t get generic tips; you get Chrysler’s flow.

Does This Manual Cover the Fuel Injection Pump?

Yes. The diesel injection pump gets its own removal and installation procedure, including pump timing adjustment. Page 15 walks through the injection pump timing procedure step by step. The manual also includes a fuel injection pump test in the diagnosis section. For the gas side, the fuel pump module is covered separately—electric pump pressure test is part of the 2.0L engine diagnosis. If you’re dealing with a no-start on the diesel, check the shutdown solenoid test on page 13 before you pull the pump.

3 Reasons to Use the Factory Documentation

First, torque specs. The torque specification table at the end of the manual lists fastener values for fuel system components. Second, the wiring and PCM input diagrams—the 2.0L section maps out every sensor input to the Powertrain Control Module, like the camshaft position sensor and the A/C pressure transducer. Third, the air bleed procedures. The diesel engine section includes bleeding at the fuel filter, high-pressure lines, and the injection pump itself. One wrong step introduces air and you’re chasing a crank-no-start for an hour. Factory manuals don’t skip steps.

Safety Warnings: Fuel System Pressure Release

Page 3 repeats the fuel system pressure warning: fuel under high pressure can penetrate skin and cause serious injury. On the 2.0L gas engine, the service procedures include a fuel system pressure release procedure—you have to know where the Schrader valve is and how to relieve the pressure before cracking any line. The diesel side warns about high-pressure fuel lines from the injection pump to the injectors. There’s a dedicated leak test for the high-pressure lines that uses the wastegate as a reference. Never skip the pressure release; I’ve seen the aftermath of a fuel injection into a forearm.

Torque Specs and Fuel Tank Capacity

The specifications section lists fuel tank capacity, idle speed for both engines, fuel injector firing sequence, and fuel system pressure values. All torque specifications are in foot-pounds (Imperial). For example, the fuel filter/water separator installation on the diesel specifies a torque for the mounting bracket bolts. The fuel tank removal and installation sections for both engines include the exact torque for the tank strap bolts and filler neck clamp. If you’re swapping a tank on a GS, you need those values to avoid distorting the flange.

Audience Fit: Who Needs This Manual?

Home garage mechanics who work on Chrysler NS and GS vans or Minivans from the late-1990s to mid-2000s. Shop owners who want liability protection by using verified factory procedures. Anyone who has ever been frustrated by a bad aftermarket reprint that left out the fuel heater relay test or the quick-connect fitting instructions. This manual assumes you have basic hand tools and a multimeter, but it does not assume you already know the order of the fuel line routing. It shows you exactly where each line goes—low-pressure tubes, high-pressure lines, drain tubes.

Related Manuals

• Chrysler NS GS Wiring Diagram”>Chrysler NS GS Wiring Diagram
• Chrysler NS/GS Transaxle and Power Transfer Unit Service Manual – Section: Power”>Chrysler NS/GS Transaxle and Power Transfer Unit Service Manual – Section: Power
• Chrysler NS GS Tires & Wheels Service Manual”>Chrysler NS GS Tires & Wheels Service Manual

For additional drivetrain context, see the Manual Transmission”>Manual Transmission section on Wikipedia. If you’re working on the 2.0L engine, the Manual Transmission”>Manual Transmission page provides background on the transaxle mating.

How many pages does this manual have?

56 pages covering both the 2.5L diesel and 2.0L gas fuel systems.

Does the manual include wiring diagrams for the PCM inputs?

Yes. The 2.0L engine section lists every PCM input and output, including the camshaft position sensor, knock sensor, MAP sensor, and the A/C relay. It also shows the data link connector and automatic shutdown relay pins. Diesel side does not have a separate wiring diagram, but the PCM-related test procedures reference the circuits. For complete chassis electrical, you’d want the separate Chrysler NS GS Wiring Diagram linked above.

Whether you’re bleeding air on a diesel or testing fuel pressure on a gas engine, having the factory procedure saves you from chasing your tail. Download the Factory Manual and keep a copy on your tablet or printed by the bay. This isn’t a reprint from some third-party—it’s the actual Chrysler document, scanned and searchable. Stop guessing and start wrenching with specs Chrysler signed off on.