Chevrolet IMPALA 3.9L 2009 Cng System Installer Manual
  1. Manuals
  2. Brands
  3. Chevrolet Manuals
  4. Automobile
  5. IMPALA 3.9L 2009
  6. Cng system installer manual

Chevrolet IMPALA 3.9L 2009 Cng System Installer Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Rev-B

Advertisement

Table of Contents
loading

Related Manuals for Chevrolet IMPALA 3.9L 2009

Summary of Contents for Chevrolet IMPALA 3.9L 2009

  • Page 1 Rev-B...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SAFETY (READ FIRST) ..........................1 INTRODUCTION ............................3 A. Important Vehicle Owner Advisories ....................3 B. SEQUENT P&D Installation Kit Contents ..................3 C. Required Tools & Equipment ......................5 D. Torque Specifications ........................5 E. Installation Note (corrosion protection) .................... 5 INSPECT FOR CORRECT VEHICLE INFORMATION &...

  • Page 3: Safety (Read First)

    SAFETY READ BEFORE PERFORMING ANY INSTALLATION, SERVICE, MAINTANENCE OR REPAIR ON THE FUEL SYSTEM There are safety regulations and standards that must be followed when installing or servicing gaseous fuel equipment. It is highly recommended you obtain and read the following National Fire Protection Association (NFPA) guidelines: SERVICE TECHNICIANS AND USERS: CAREFULLY READ AND ABIDE BY THE PROVISIONS SET FORTH IN NATIONAL FIRE...
  • Page 4 The following points are things to keep in mind when working on internal combustion engines and gaseous fuel systems: Before working on any fuel system, study the NFPA standard for the fuel in use. Before working on any fuel system, read and understand all manufacturers’ recommended procedures.

  • Page 5: Introduction

    INTRODUCTION A. Important Vehicle Owner Advisories: • At the time of this writing, the Sequent P&D system has not been certified by the California Air Resources Board (CARB). If the vehicle is moved to California, it may not be registered without returning the vehicle to as-close-as-possible to original condition.
  • Page 6 Part  Number  Description    Quantity    S1‐30871‐02‐0616  Screw, Hex Flange, M6 x 16MM  2  S1‐30871‐02‐0612  SCREW, HEX FL M6X12MM  4  L3‐50820‐016  LABEL, EMISSION GM'09 3.9L CNG  1  S1‐30295‐0650  SCREW, HEX SOCKET CAP  2  S1‐30871‐02‐0812  SCREW,HEX FLANGE‐M8X1.25X12  3  C2‐14106‐004  Clamp, Hose 5/16"Od 7/8" Gear  4  C2‐14106‐006  Clamp, Hose 1/2 To 1 1/8 Sae10  4  B4‐51391‐001  BRACKET, REG '08 IMPALA CNG  1  PPI‐A‐004  MANUAL, OWNERS SEQUENT P&D CNG  1  PPI‐A‐005  SEQUENT WARRANTY REGISTRATION  1  H5‐15342‐1  TUBING, HEATSHRINK 3/16" BULK  4 ft  T4‐50880‐001  TERM.,EYE 1/4" STUD 12‐10 GA  2  T4‐50879‐001  TERMINAL, WIRE SPLICE 22‐16 GA ...

  • Page 7: Required Tools & Equipment

    C. Required Tools, Equipment & Supplies: • Sequent Installer’s Tool Kit (part # 90AV99004048) • Software Installation Kit (part # 90AV99002055) • SAE and metric mechanic’s hand tools • Electric or cordless drill and assorted drill bits • Large hose clamp pliers •...

  • Page 8: Inspect For Correct Vehicle Information & The Operational Integrity Of The Engine

    INSPECT FOR CORRECT VEHICLE INFORMATION AND THE OPERATIONAL INTEGRITY OF THE ENGINE Installing an alternative fuel system into a vehicle with an engine or ignition system that is in poor condition will produce less than desirable results and may lead to exhaust emissions beyond acceptable levels.

  • Page 9: High Mileage Vehicle Inspection (75K+)

    C. High Mileage Vehicle Inspection (75k+) or scan tool not available: High mileage vehicles require further inspection. The following items require physical inspection: • Start the engine and inspect the exhaust for signs of excessive smoke. • Remove the engine dip stick and inspect the oil condition. Change oil and filter if necessary. •...

  • Page 10: Sequent P&D Installation

    SEQUENT P&D INSTALLATION A. Pre-Installation Bench Assembly: 1) Locate the six fuel injectors and both fuel rails. The injectors will be installed into the rails as illustrated. 2) Install three Sequent injectors into each of the fuel rails and torque the injector nuts to 71 in-lb (8 Nm).
  • Page 11 4) Insert the aluminum sealing washer into the CNG manometer receiver on the high-pressure filter and install the manometer. Tighten the manometer so it is in the approximate position keeping the torque between 15-30 ft-lbs (20-40 Nm). 5) Install the High Pressure Filter onto the regulator.
  • Page 12 7) Assemble the fuel hoses by inserting the barbed hose fittings through the 8mm special nuts and into the ends of the fuel hoses. Install two clamps over the hoses centering them over the barbed fittings and clamping them with the hose clamp pliers.

  • Page 13: Intake Manifold, Ignition Coil Pack And Air Filter Housing Removal

    B. Intake Manifold, Ignition Coil Pack and Air Filter Housing Removal: Prior to any disassembly, clean the engine and engine compartment (with engine degreaser where necessary). Disconnect the negative battery cable followed by the positive battery cable and remove the battery from the vehicle. Following the manufacturer’s service manual instructions, remove the upper intake manifold, then the ignition coil pack.
  • Page 14 4) Attach the long tap handle to the combination 6x1mm tap & drill. Apply a light coat of tapping oil to the tap threads and tap the nozzle hole keeping the tap perpendicular to the runner face. Repeat steps 3 – 5 for the remaining five intake runners.

  • Page 15: Zenith Regulator And Coolant Hose Installation

    7) Apply some clean engine oil to the OEM injector o-rings and install the OEM fuel injector rails torqueing the bolts to OEM specifications. Intake manifold with OEM fuel injector rails installed and Sequent fuel hoses routed correctly. 8) Drill and tap the upper intake manifold for the brass vacuum port adapter using the 5mm drill and the 6mm tap.

  • Page 16: Lockoff And High Pressure Tubing Installation

    2) Begin modifying the heater hoses by pinching them with four hose pliers to make room for the two plastic Tees. 3) Cut the heater hoses between the clamps, install four hose clamps onto the hoses and install the two plastic Tees. 4) Temporarily install the Regulator and cut two lengths of the Regulator Coolant Hose to fit between the two Tees and the...

  • Page 17: Fuel Rail Installation

    2) The bracket will be mounted on the driver’s side shock tower close to the top. Bend the bracket as illustrated to approximate the mounting surface of the shock tower. 3) Install the Lockoff onto the bracket as illustrated. Using the bracket as a template, drill two ¼”...

  • Page 18: Cng Low Pressure Hose Connections

    4) Mount the 4-6 fuel rail onto its bracket. Attach fuel hoses 4-6 to the appropriate injector routing the hoses as indicated in the photo. Tie wrap #4 & 5 hoses to the OEM fuel rails where indicated in the photo.

  • Page 19: Sequent / Oem Ecm Electrical Connections

    H. Sequent / OEM Electrical Connections: Proper Wire Splicing Terminal Crimping Types: There are two types of terminals used in the installation of the Sequent P&D wiring harness. To ensure a good crimp, use the appropriate style crimping tool (including correct gauge) as illustrated below.
  • Page 20 Soldering Crimps & Terminals: Solder all terminals after crimping as illustrated using an electronic grade, rosin core solder (0.7 to 1.0mm diameter works best). Make sure all wires in the terminal receive adequate solder to ensure a permanent connection. “Barrel” Style Lug Terminals “U”...
  • Page 21 1) Disconnect both connectors from the OEM ECM. Layout the Sequent wiring harness with all pigtails approximately where they will be installed. 2) Carefully remove the wiring cover from the back of the OEM ECM connectors X1 & X2. 3) Remove the harness tape and conduit to expose the ECM connector wiring.

  • Page 22: Sequent Ecm, Relay & Fuse Locations

    Sequent ECM, Relay & Fuse Locations: 1) Install the Sequent ECM (with spacers), relay and fuses where indicated. Battery Connections: Crimp and solder the terminals onto the red and black battery wires. NOTES: • The B+ connection can be made directly to the battery or fuse box. DO NOT connect to any circuit directly connected to the alternator/generator.

  • Page 23: Re-Install The Ignition Coil Pack And Upper Intake Manifold

    K. Re-install the Ignition Coil Pack and the Upper Intake Manifold. 1) Following the OEM installation procedures, re-install the ignition coil pack and (using new gaskets) the upper intake manifold with the Sequent injector rail brackets. Manifolds removed from engine for clarification purposes only.

  • Page 24: Obd-Ii Connections And Changeover Switch / Buzzer Installation

    M. OBD-II Connections and Changeover Switch / Buzzer Installation: 1) Remove the grommet on the passenger side of the bulkhead. Split the grommet with a razor blade just enough to push the Changeover Switch and OBD-II pigtails through. Push the changeover switch connectors through the hole, re-install the grommet and seal it with a little black RTV Sealant.

  • Page 25: Sequent Component Electrical Connections

    N. Sequent Component Electrical Connections: 1) Connect the Sequent injector connectors. Match the number on the injector wiring to the CNG injector as illustrated. Failure to follow this order will result in a rough fuel change over and reduced performance on CNG.

  • Page 26: Initial Engine Start

    Q. Initial Engine Start: 1) After making all fuel system leaks and installation inspections: • Switch the changeover switch to Gasoline operation (red FOIL). • Connect an OBD-II scan tool to the OEM DLC connector. • Connect the Sequent DLC cable to the vehicle and the laptop.

  • Page 27: Warranty Card, Labels And Owner's Guide

    S. Warranty Card, Emissions Label & Owner’s Guide: 1) Warranty registration is available on IMPCO Technologies’ Website: http//www.impco.ws/sequent-tools.asp (requires login). If Internet registration is not possible, fill out the warranty card completely and drop it in the mail or fax it to: 714 656-1414 2) Fill out the Emissions Label completely and attach it where illustrated.
  • Page 28 3) Install the Fuel Door E85 Notice label on the inside of the fuel door. 4) Put the Sequent P&D Owner’s Guide in the a prominent location on the dash or center console where the customer can easily locate it. It is strongly recommended to go over some of the highlights of the Owner’s Guide with the customer.

  • Page 29: Maintenance

    Maintenance: Maintenance consists of: • Periodic visual inspection of all vacuum lines and fittings. • Periodic visual inspection of all fuel lines and fittings. • Periodically check entire intake system for vacuum leaks. • Periodically check condition of all wiring. •...
  • Page 31 NOTES: 5 Amp Fuse 2009 3.5/3.9L Chevy Impala Sequent P&D Sequent P&D ECM 1) Wire LASER imprints are indicated 25 Amp adjacent to wire with an “L-” and wire Installer’s Wiring Diagram Fuse color in apprenthesis. Rev-B Example: L- # 666666 (Org) 5-6-7 Relay Technician installed splice...
  • Page 32 Coolant Battery 25A Fuse 5A Fuse Power Relay Diagnostic Change Over Sequent MAP Fuel Level Lockoff Lockoff Sensor/ Temp Sensor Connector Switch Buzzer Sensor Sequent P&D 30 86 87 87 85 Manometer Wiring Schematic Coolant Temp Sen Input 1 5V Ref Output 2 2009 3.5/3.9L Fuel Press Sen Input 3 Chevy Impala...

Table of Contents