244
out of the Regulator.
6. Inspect the Regulator for any large dried par-
ticles and remove. Use a safety solvent to
remove any build up.
Use only Safety Solvents for the cleaning
of the regulator and its components. Sol-
vents such as carburetor or brake cleaners
may damage gaskets, seals, O-rings, di-
aphragms or other non-metal components.
Contamination of the HEGO sensor can re-
sult from the use of an inappropriate RTV
sealer or silicone spray products. Do not use
silicone sprays or hoses which are assem-
bled using silicone lubricants. Always use
“oxygen sensor safe” RTV sealant for repair
procedures. Silicon contamination will cause
a high but false HEGO signal voltage (rich
exhaust indication). The ECM will then re-
duce the amount of fuel delivery to the
engine, causing a severe driveability prob-
lem. If silicone contamination is suspected,
remove and visually inspect the sensor ele-
ment. If contaminated, the portion of the
sensor exposed to the exhaust stream will
have a white powdery coating. Always be
sure to eliminate the cause of contamination
before replacing the sensor.
7. Reinstall the Plug.
Torque until tight.
8. Connect negative battery cable.
9. Open Valve on LPG tank.
IMPORTANT:
The fuel cylinder manual valve contains an
Excess Flow Check Valve open the manual
valve slowly to prevent activating the Excess
Flow Check Valve.
10. Turn Key ON. Check for leaks at the inlet and
outlet
fi
ttings using a soapy solution or an
electronic leak detector. If leaks are detected
make repairs.
11. Start engine and check for leaks at all ser-
viced fittings. If leaks are detected make
repairs.
12. Dispose of any drained material in safe and
proper manner.
XIII. FUEL FILTER ELEMENT (HIGH PRESSURE)
REMOVAL PROCEDURE
1. Relieve the LPG fuel system pressure. Refer
to
XVIII. LPG FUEL SYSTEM PRESSURE
RELIEF.
2. Disconnect negative battery cable.
A small amount of fuel may still be present in
the fuel line. Use gloves and proper eye pro-
tection to prevent burns. Make sure the
manual valve is fully closed.
Regulator, showing filter related components.
3. Disconnect the fuel inlet and outlet lines from
the LPG Regulator.
4. Remove the fuel inlet fitting (7) and O-ring (6).
5. Remove the plastic body (5), foam filter (4),
paper filter element (3), and filter gasket (2).
6. Remove the screws (5), fuel outlet fitting (4)
O-ring (3), and filter (2). Discard O-ring and fil-
ter.
INSTALLATION PROCEDURE
1. Install new filter (2) in port for fuel outlet fitting.
Install new O-ring (3) and fuel outlet fitting (4).
2. Install retaining screws (5) for fuel outlet fitting
(4). Tighten screws to 2 to 3 N•m (17.7 to
26.55 in. lb.).
Summary of Contents for 3.0L GM
Page 4: ...4 ...
Page 5: ...5 General Information ...
Page 9: ...9 Maintenance ...
Page 16: ...16 ...
Page 17: ...17 LPG Fuel System ...
Page 18: ...18 LPG FUEL SYSTEM OPERATION ...
Page 25: ...25 LPG Closed Loop Schematic ...
Page 26: ...26 ...
Page 27: ...27 LPG System Diagnosis ...
Page 35: ...35 Fuel Symptom Diagnostics ...
Page 51: ...51 Electrical Section ...
Page 52: ...52 ...
Page 53: ...53 DST Diagnostic Scan Tool ...
Page 59: ...59 Select the USB button then click the OK box Click on the Search attached device box ...
Page 67: ...67 When connected the live data stream appears in the Value column ...
Page 78: ...78 ...
Page 80: ...80 ...
Page 81: ...81 Engine Wire Schematic ...
Page 82: ...82 2011 3 0L GM Engine IMPCO Emission Certified LPG Fuel System ...
Page 83: ...83 ...
Page 84: ...84 ...
Page 85: ...85 Engine Wire Harness Repair ...
Page 89: ...89 Diagnostic Trouble Codes DTCs ...
Page 93: ...93 ...
Page 101: ...101 ...
Page 105: ...105 ...
Page 109: ...109 ...
Page 119: ...119 ...
Page 129: ...129 ...
Page 133: ...133 ...
Page 137: ...137 ...
Page 141: ...141 ...
Page 145: ...145 ...
Page 161: ...161 ...
Page 165: ...165 ...
Page 169: ...169 ...
Page 173: ...173 ...
Page 201: ...201 ...
Page 209: ...209 ...
Page 213: ...213 ...
Page 217: ...217 ...
Page 221: ...221 ...
Page 225: ...225 ...
Page 229: ...229 ...
Page 237: ...237 Servicing the Fuel System ...
Page 254: ...254 ...
Page 255: ...255 LPG Parts Diagram ...
Page 256: ...256 THROTTLE BODY ASSEMBLY ...
Page 258: ...258 FUEL RAIL INJECTORS ...
Page 260: ...260 REGULATOR ASSEMBLY ...
Page 262: ...262 HOSE ASSEMBLIES COOLANT VACUUM FUEL ...
Page 264: ...264 THERMOSTAT HOUSING ...
Page 266: ...266 ENGINE CONTROL MODULE ...
Page 267: ...267 ENGINE CONTROL MODULE Item Description Qty IMPCO Part Number 1 ECM Liugong 1 A11 173 ...
Page 268: ...268 SENSORS 4 1 3 6 5 2 7 ...
Page 270: ...270 DISTRIBUTOR ...
Page 272: ...272 FUSE BOX BRACKET ...
Page 274: ...274 IGNITION COIL ...
Page 275: ...275 IGNITION COIL Item Description Qty Part Number 1 Coil Ignition 1 7245530 ...
Page 276: ...276 MANIFOLDS ...
Page 278: ...278 WIRE HARNESS FUSES FUSE BOX COVER Fuse Box Layout 4 ...
Page 280: ...280 PCV VENT VALVE ...
Page 282: ...282 MISCELLANEOUS ENGINE ...
Page 284: ...284 ALTERNATOR ...
Page 286: ...286 STARTER ...
Page 291: ...291 ...
Page 292: ...292 3 0L UPPER ...
Page 294: ...294 3 0L LOWER ...
Page 298: ...298 ...
Page 299: ...299 Labor Time Guide ...
Page 317: ...317 Definitions ...
Page 322: ...322 ...
Page 323: ...323 Appendix ...
Page 327: ...327 DTC SPN FMI Chart ...