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1. Install the PCV fresh air tube to the inlet duct Install ignition wires 1 3 5 7 to the distributor cap Add one 1 ounce of Port Fuel Injector Cleaner P N 12345104 Canada P N 10953467 to the vehicle fuel tank for each gallon of gasoline estimated to be in the tank Instruct the customer to add the remainder of the bottle of Port Fuel Injector Cleaner to the vehicle fuel tank at the next fill up Further recommend that Port Fuel Injector Cleaner be added to the fuel tank every 3000 miles 4800 km particularly if the vehicle is not started and driven every day Inform the customer that the Port Fuel Injector Cleaner is not to be used at every fill up but may be reapplied every 3000 miles 4800 km Tighten the fuel tank filler cap Start the vehicle and check for fuel leaks Using the Tech 2 scan tool check for any stored Powertrain DTC codes Clear codes as required Disconnect the Tech 2 Scan tool Advise the customer to change brands of fuel M L G Van and P Truck http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 10 of 23 Loosen the fuel tank filler cap to relieve fuel tank vapor pressure Remove the engine cover Remove ignition wires 1 3 5 7 from the distributor cap Remove the vacuum brake booster hose and connector from the intake manifold UNBE 5 Remove the fuel pipe bolt 4 at the rear of the intake manifold 6 Relieve the fuel system pre2. IAE C K S T Trucks G Vans P Chassis Meter Assembly and or Gasket Throttle Body Fuel Replace M L Vans GM bulletins are intended for use by professional technicians NOT a do it yourselfer They are written to inform WE SUPPORT these technicians of conditions that may occur on some vehicles or to provide information that could assist in the proper service of a vehicle Properly trained technicians have the equipment tools safety instructions and know how amp VOLUNTARY to do a job properly and safely If a condition is described DO NOT assume that the bulletin applies to your vehicle or A oa TECHNICIAN that your vehicle will have that condition See your GM dealer for information on whether your vehicle may benefit from the information CERTIFICATION http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010
3. 39021 301 V6 Fuel Injector Test Adapter 1 or J 39021 302 V8 Fuel Injector Test Adapter to the metering body electrical connector 17 Adjust the amperage selector switch on J 39021 to 0 5 amps http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 6 of 23 18 19 20 21 22 23 24 25 26 27 28 29 30 31 in TEAREN karsarsars Ae Sij 2 CALAT rare aT ars Re al 3S 5 SSSR at NS ATER ALOn TENET en SANIT AARNE ENE SS Seas LA St Gin ate AGES IL SS ay AY kant eat SEY ETR Ry AASS ee So oe ae N mir AA iret hs ah Wan nk mat SS h pease Rad Sh ots sett bee Ny aa Woy cea oo ates TETA RAA Y 5 SS E tetett idee hretebientarsarhenenrennntays AR ae ea Open the valve 2 on the tank 3 Open the valve 4 on the J 44466 10 to pressurize the fuel system The minimum pressure required on the gauge 6 is 150 psi If 150 psi is not obtained the tank 3 must be refilled prior to performing this procedure Close the valve 4 on the J 44466 10 Energize one injector using the J 39021 Observe a pressure drop on the gauge 6 and verify the injector poppet valve operation An injector poppet that is stuck and not operational will have no pressure drop on the gauge If an injector remains stuck repeat the procedure multiple times as required until the injector is operational Repeat steps 19 20 and 21 for each individual injector
4. Cyl 1 tube 2 Cyl 2 tube 3 Cyl 3 tube 4 Cyl 4 tube 5 Cyl 5 tube 6 Cyl 6 tube 7 MFI Fuel Meter Body 2 Remove the Fuel Meter Body bracket and discard Install the new bracket as shown in Figure iF Figure 2 1 Cyl 1 tube http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 19 of 23 2 Cyl 2 tube 3 Cyl 3 tube 4 Cyl 4 tube 5 Cyl 5 tube 6 Cyl 6 tube 7 MFI Fuel Meter Body 3 Position Fuel Tubes of MFI Fuel Meter Body as shown in Figure 2 Tubes must be oriented away from the fuel pressure regulator end of the fuel meter body Notice The number 3 Fuel Tube must be positioned behind the number 1 Fuel Tube to eliminate interference with the Upper Intake Manifold plenum when installed See Figure 2 4 Insert the MFI Fuel Meter Body into the Fuel Meter Body Bracket on the Lower Intake Manifold being careful not to bind the Fuel Tubes Make sure that the number three Fuel Tube is routed in behind number 1 and 5 Fuel Tubes as shown in Figure 2 Push down firmly on the fuel meter body locking it into the bracket Notice Use caution when inserting injectors into lower intake manifold to be sure the correct injector is being placed into the correct hole Injectors should not be removed once they have been installed Removal of injectors from the intake manifold may cause damage to the retaining lugs on the injector Important The I
5. cap Install the vacuum brake booster hose and connector to the intake manifold http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 14 of 23 30 Obtain J 35800 A 2 Make sure the valve 3 at the bottom of the canister is closed 31 Remove the canister top and add 24 ml 0 8 fl oz Top Engine Cleaner P N 1050002 Canada P N 992872 to the canister 32 Fill the remainder of the canister with regular unleaded gasoline and install the canister top 33 Suspend the J 35800 A in a convenient location 34 Connect the hose from the J 35800 A to the service port on the J 44466 12 35 Open the valve 3 at the bottom of J 35800 A 36 Connect a shop air source to the fitting at the top of J 35800 A and adjust the regulator 1 to 75 psi 37 Start the vehicle It may be necessary to re adjust the J 35800 A pressure regulator to maintain 75 psi 38 Let the vehicle run at idle until the canister is empty and the vehicle stalls 39 Remove the shop air supply from J 35800 A 40 Depressurize the J 35800 A 41 Disconnect the J 35800 A hose from the J 44466 12 42 Remove the vacuum brake booster hose and connector from the intake manifold 43 Remove ignition wires 1 3 5 7 from the distributor cap 44 Bleed the residual pressure from J 44466 12 http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 15 of 23 46 Re
6. not started and driven every day Inform the customer that the Port Fuel Injector Cleaner is not to be used at every fill up but may be reapplied every 3000 miles 4800 km Tighten the fuel tank filler cap Start the engine and check for fuel leaks Use the Tech 2 Scan Tool to check for any stored Powertrain DTC codes Clear codes as required Disconnect the Tech 2 Scan tool Install the engine cover Advise customer to change brands of fuel Central SFI to MFI Conversion Instructions This procedure outlines the steps required to replace the existing Central SFI Fuel System with a new MFI Multiport Flexible Injection Fuel System Be sure to use the appropriate year and model Service Manual for proper disassembly and re assembly procedure s Important Cleaning the CSFI injectors is the preferred repair The CSFI unit should not be replaced until cleaning has been attempted If the vehicle should return for the same repair then the CSFI unit can be replaced with a MFI unit If the vehicle is out of warranty the customer should be given the option of which fix to pursue V6 Engines 1 Remove Upper Intake Manifold plenum and SFI Fuel Meter Body according to Service Manual Procedures Figure 1 http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 18 of 23 in pui w i SS G ot hee eS Manion TIT TIZAr B rae itr il 1
7. of which fix to pursue Important GM of Canada dealers require District Service Manager approval prior to replacing the CSFI unit with a MFI unit under warranty The first step of this process is to use the J 41413 Evap Pressure Purge Station in conjunction with the J 44466 10 pressure regulator hose assembly to provide the required high pressure 150 psi source to perform the unsticking procedure The J 39021 fuel injector tester and accessories provide the means to energize the injector Some later model year vehicles may utilize the Tech 2 to energize the injectors The second step of this process is to run the engine on a solution of 10 Top Engine Cleaner and 90 gasoline This will effectively clean any deposits from the ball and seats of the poppets It is very important that the engine fuel system is separated from the vehicle fuel system Top Engine Cleaner may have detrimental effects on the fuel pump Cleaning Procedures This procedure should be performed before any attempt to convert the fuel system to MFI S T and C K Truck Loosen the fuel filler cap to relieve vapor pressure in the fuel tank Remove the Positive Crankcase Ventilation PCV clean air tube from the air inlet tube and set aside Remove the bonnet and inlet tube from the throttle body Remove the brake booster vacuum hose and connector from the intake manifold Remove the electrical connector from the CSFI fuel metering body Remove ignition wire
8. to verify that all injector poppet valve assemblies are unstuck and functional Shut off pressure valve 2 on the tank 3 of the J 41413 Bleed off the pressure at the J 44466 10 Disconnect and remove the J 44466 10 5 from the J 44466 12 and the J 41413 Remove the J 39021 301 or J 39021 302 J 39021 210 and J 39021 from the metering body Install the vehicle electrical connector to the metering body Install the brake booster vacuum hose and connector to the intake manifold Install ignition wires 1 3 5 7 to the distributor cap Install the air inlet bonnet to the throttle body tighten the wing nut Install the PCV fresh air tube to the air inlet tube http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 7 of 23 Obtain J 35800 A 2 Make sure the valve at the bottom of the canister 3 is closed Remove the canister top and add 24 ml 0 8 fl oz Top Engine Cleaner P N 1050002 Canada P N 992872 to the canister Fill the remainder of the canister with regular unleaded gasoline and install the canister top Suspend J 35800 A from a convenient underhood location Connect the hose from J 35800 A to the service port on the J 44466 12 Open the valve 3 at the bottom of J 35800 A Connect a shop air source to the fitting at the top of J 35800 A and adjust the regulator 1 to 75 psi Start the vehicle It may be necessary to re adjust the J 35800 A pressure regul
9. unsticking and cleaning process has proven to be effective in restoring poppet valves to an as new condition CSFI injector replacement should NOT be considered as a correction for this customer concern Check the vehicle history to determine if the vehicle is returning for a second fuel system repair for this condition If the fuel system has been repaired for this condition previously then inform the customer that an alternate fix is available A new MFI fuel system has been developed that will back service the CSFI fuel syste 2dheditd fduebisystamrighminatesathe CSFI poppet valve ball and http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 2 of 23 seat The CSFI fuel system will need to be replaced as a unit Refer to Central SFI to MFI Conversion instructions in this bulletin Notice Individual CSFI injectors can not be replaced with MFI injectors The entire CSFI fuel meter body will need to be replaced The bracket used to retain the injectors in the fuel meter body is different between the CSFI and MFI unit The unit may not seal if you mix injectors Severe engine damage could result Cleaning the CSFI injectors is the preferred repair The CSFI unit should not be replaced until cleaning has been attempted If the vehicle should return for the same repair then the CSFI unit can be replaced with an MFI unit If the vehicle is out of warranty the customer should be given the option
10. Document ID 1234172 Page 1 of 23 1999 GMC Truck Savana Express Savana VIN G Service Manual Document ID 1234172 00 06 04 003B Rough Idle After Start And OrA Service Engine Soon SES Light Unstick And Clean Central Sequential Fuel Injection CSFI Poppet Valves or Convert to MFI Jan 30 2003 Subject Rough Idle After Start And Or A Service Engine Soon SES Light Unstick And Clean Central Sequential Fuel Injection CSFI Poppet Valves or Convert to MFI Models 1995 2002 Chevrolet and GMC S T Models 1996 2002 Chevrolet and GMC C K M L G P Models 1996 2001 Oldsmobile Bravada 1999 2000 Cadillac Escalade with 4 3L 5 0L or 5 7L Engine VINs W X M R RPOs L35 LF6 L30 L31 Except 2002 VIN X RPO LU3 Models This bulletin is being revised to update the Correction and Warranty Information Please discard Corporate Bulletin Number 00 06 04 003A Section 06 Engine Condition Some customers may comment on rough idle after start up especially if the vehicle has sat overnight These symptoms may be intermittent The Service Engine Soon SES light may also be illuminated Current misfire or history misfire codes may be detected with the Tech 2 scan tool Cause A deposit build up on the CSFI poppet valve ball and or seat may cause the poppet ball to stick open or closed In either case the specific cylinder will be mis fueled resulting in a cylinder mis fire condition Correction A new injector
11. Manual for proper disassembly and re assembly procedure s http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 20 of 23 1 Remove Upper Intake Manifold plenum and SFI Fuel Meter Body according to Service Manual Procedures 2 Remove the Fuel Meter Body bracket and discard Install the new bracket Figure 3 iro we Ty _ es NA 1 Cyl 2 4 6 and 8 tubes 2 Fuel Inlet 3 Cyl 1 3 5 and 7 tubes 4 Fuel Pressure Regulator 3 Position Fuel Tubes of MFI Fuel Meter Body as shown in Figure 3 Fuel tubes 1 3 5 and 7 are oriented toward the fuel inlet side of the fuel meter body Fuel tubes 2 4 6 and 8 are oriented toward the fuel pressure regulator side if the fuel meter body 4 Insert the MFI Fuel Meter Body into the Fuel Meter Body Bracket on the Lower Intake Manifold being careful not to bind the Fuel Tubes Push down firmly on the fuel meter body until the tabs snap into the bracket locking the fuel meter body in place http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 21 of 23 1 Cylinders 6 amp 8 2 Fuel Pressure Regulator 3 Cylinders 2 amp 4 4 Cylinders 5 amp 7 5 Cylinders 1 amp 3 5 Orient the fuel tubes to coincide with their corresponding cylinder The fuel tubes are numbered on the side of the fuel meter body and the corresponding cylinder number is cast in
12. ator to maintain 75 psi Let the vehicle run at idle until the canister is empty and the vehicle stalls Remove the shop air supply from J 35800 A Depressurize the J 35800 A Disconnect the J 35800 A hose from the J 44466 12 Remove the PCV clean air tube from the air inlet tube and set aside Remove the bonnet from the throttle body and set aside Remove ignition wires 1 3 5 7 from the distributor cap Remove the brake booster vacuum hose and connector from the intake manifold Bleed the residual pressure from the J 44466 12 http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 8 of 23 50 Remove J 44466 13 1 clamp 2 and J 44466 11 4 from the fuel pipe 3 http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 9 of 23 51 D2 53 59 60 61 62 63 Install the fuel pipe 3 to the metering body Make sure that all of the O rings 6 and 8 washers 7 and spacers 5 are present and in their proper position Install the clamp 2 and nuts 1 Tighten Tighten the nuts to 3 N m 27 Ib in Apply threadlock P N 12345382 or equivalent to the threads of the fuel pipe bolt 4 Install the bolt Tighten Tighten the fuel pipe bolt to 6 N m 53 Ib in Install the brake booster vacuum hose and connector to the intake manifold Install the bonnet and air inlet tube to the throttle body
13. e Manifold Gasket and replace if necessary Reinstall the Upper Intake Manifold plenum following the procedures in the Service Manual Important Lubricate the Fuel Inlet and Return Lines with clean engine oil before inserting them in the of the Fuel Meter Body Make sure that Fuel Line Retaining Bracket is properly oriented with the tabs down Parts Information Cleaning Procedure Parts Part Number 12345382 Threadlock 1050002 Top Engine Cleaner U S 992872 Top Engine Cleaner Canada 12345104 Port Fuel Injector Cleaner U S 10953467 Port Fuel Injector Cleaner Canada CSFI to MFI Conversion Parts Part Number L Description 12568332 V 6 MFI Assembly 88894355 V 6 Bracket 17113215 V 6 Seal Kit 93441235 V 8 MFI Assembly 17113206 V 8 Seal Kit 93442096 V 8 Bracket Parts are currently available from GMSPO Warranty Information Important Some California vehicles may be covered by Special Policy 99066E if built with California Emissions RPO YF5 If the vehicle is covered by the special policy then that warranty information should be used http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 23 of 23 For vehicles repaired under warranty use Labor Labor Operation Description Time Injector Fuel Clean 1 3 hrs C K S T Injector Fuel Clean J5645 M L P Injector Fuel Clean G Van Meter Assembly and or Gasket Throttle Body Fuel Replace
14. move the J 44466 01 1 from the vehicle fuel lines http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 16 of 23 47 Install the fuel pipe 3 to the metering body Make sure the all of the O rings 6 and 8 washers 7 and spacers 5 are present and in their proper position 48 Install the clamp 2 and nuts 1 Tighten Tighten the nuts to 3 N m 27 Ib in Go 49 Inspect the O rings at the fuel pipe to vehicle lines 1 Replace as necessary Tighten Tighten the fuel line nuts to 30 N m 22 Ib ft http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 17 of 23 50 54 55 56 57 58 59 Apply threadlock P N 12345382 or equivalent to the threads of the fuel pipe bolt Install the bolt Tighten Tighten the fuel pipe bolt to 6 N m 53 Ib in Install ignition wires 1 3 5 7 to the distributor cap Install the vacuum brake booster hose and connector to the intake manifold Add one 1 ounce of Port Fuel Injector Cleaner P N 12345104 Canada P N 10953467 to the vehicle fuel tank for each gallon of gasoline estimated to be in the tank Instruct the customer to add the remainder of the bottle of Port Fuel Injector Cleaner to the vehicle fuel tank at the next fill up Further recommend that Port Fuel Injector Cleaner be added to the fuel tank every 3000 miles 4800 km particularly if the vehicle is
15. njector holes are numbered on the Lower Intake Manifold The injectors are numbered on the side of the Fuel Meter Body 5 Insert the number 3 injector into the correct Injector hole in the Lower Intake Manifold first Install the number 5 injector next and then number 1 This sequence must be followed correctly to prevent interference of the Fuel Tubes Injectors 2 4 and 6 are then installed 6 Insure that the electrical connectors of the injectors are positioned so that they do not interfere with each other and are pointing towards the center of the Intake Manifold If necessary rotate the electrical connectors inboard Notice Lack of lubrication will make installation of the Upper Intake Manifold plenum difficult and may cause damage to the O ring 7 Lubricate the Fuel Meter Body Upper Manifold O ring orange in color with clean engine oil 8 Inspect the Upper Intake Manifold plenum gasket and replace if necessary Reinstall the Upper Intake Manifold plenum following the procedures outlined in the Service Manual Important Lubricate the Fuel Inlet and Return Lines with clean engine oil before inserting them into the Fuel Meter Body Make sure that the Fuel Line Retaining Bracket is properly oriented with the tabs down V8 Engines This procedure outlines the steps required to replace the existing Central SFI Fuel System with a new MFI Multiport Flexible Injection Fuel System Be sure to use the appropriate year and model Service
16. s 1 3 5 7 from the distributor cap Ne eS http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 3 of 23 7 Remove the fuel line bolt 4 at the rear of the intake manifold 8 Relieve the fuel system pressure at the service fitting on the fuel line Use a shop towel to contain any fuel that may exit the service fitting 9 Remove the nuts 1 and clamp 2 from the fuel pipe 10 Remove the fuel pipes from the metering body Be careful not to disturb the O rings washer and spacer in the metering body http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 4 of 23 Install the J 44466 12 2 and the J 44466 13 1 to the metering body and tighten Make sure that the fuel pipe O rings washer and spacers are present and in their proper position 12 Install the J 44466 11 4 clamp 2 and J 44466 13 1 to the fuel pipe and tighten http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 5 of 23 13 Obtain the J 41413 close the valve 2 on the tank and remove the regulator assembly 14 Install the J 44466 10 5 to the J 41413 tank 3 The J 44466 10 regulator is preset to 150 psi 15 Connect the J 44466 10 hose 1 to the J 44466 12 3 16 Install the J 39021 Injector Coil Balance Tester the J 39021 210 Injector Tester Adapter Box and J
17. ssure at the service fitting on the fuel pipe Use a shop towel to contain any fuel that may exit the service fitting Go 7 Disconnect the fuel pipes 3 at the rear of intake manifold 1 http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 11 of 23 8 Remove the nuts 1 and clamp 2 from the fuel pipe 9 Remove the fuel pipes from the metering body Be careful not to disturb the O rings washer and spacer in the metering body 10 Remove the electrical connector from metering body 11 Install J 44466 12 2 and J 44466 13 1 to the fuel metering body and tighten Make sure that the fuel pipe O rings washer and spacers are present and in their proper position http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 12 of 23 13 14 15 16 17 Obtain the J 41413 close the valve 2 on the tank and remove the regulator assembly Install the J 44466 10 5 to the J 41413 tank 3 The J 44466 10 regulator is preset to 150 psi The minimum pressure required on the gauge 6 is 150 psi If 150 psi is not obtained the tank must be refilled prior to performing this procedure Connect the J 44466 10 hose to the J 44466 12 Install J 39021 Injector Coil Balance Tester the J 39021 210 Injector Tester Adapter Box and J 39021 301 V6 Fuel Injector Test Adapter or J 39021 302 V8 Fuel Injector Test Adap
18. ter to metering body electrical connector Adjust the amperage selector switch on J 39021 to 0 5 amps http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 13 of 23 18 19 20 21 22 23 24 25 26 2 7 28 29 a aie u a m N any SESS Ia SAAS Se Skye neae SSS SOV Ra at i eats Sect St mattis achat Yat Jtt Temeer ATSAN ARAN Open the valve 2 on the tank 3 Open the valve 4 on the J 44466 10 to pressurize the fuel system Close the valve 4 on the J 44466 10 Energize one injector using the J 39021 Observe a pressure drop on the gauge 6 and verify the injector poppet valve operation An injector poppet that is stuck and not operational will have no pressure drop on the gauge If an injector remains stuck repeat the procedure multiple times as required until the injector is operational Repeat steps 19 20 and 21 for each individual injector to verify that all injector poppet valve assemblies are unstuck and functional Shut off the pressure valve 2 on the tank 3 of the J 41413 Bleed off pressure at J 44466 10 Disconnect and remove the J 44466 10 hose from the J 44466 12 and the J 41413 Remove the J 39021 301 or J 39021 210 J 39021 210 and J 39021 from the metering body Install the vehicle electrical connector to the metering body Install ignition wires 1 3 5 7 to the distributor
19. the intake manifold Notice Use caution when inserting injectors into lower intake manifold to be sure the correct injector is being placed into the correct hole Injectors should not be removed once they have been installed Removal of injectors from the intake manifold may cause damage to the retaining lugs on the injector Important The Injector holes are numbered on the Lower Intake Manifold The injectors are numbered on the side of the Fuel Meter Body 6 Insert the fuel tubes into their corresponding holes in the intake manifold Install tubes for cylinders 1 3 6 and 8 making sure that the injector electrical connectors are facing in http gsi xw gm com si showDoc do docS yskey 1234172 amp from sm 10 24 2010 Document ID 1234172 Page 22 of 23 toward the center of the manifold 7 Insert fuel tubes for cylinders 2 4 5 and 7 in the same manner Important When installing fuel tubes it is important that the tubes are oriented properly to provide minimal interference when installing the upper intake manifold plenum Intake holes for cylinders 2 4 5 and 7 are closer to the fuel meter body It is necessary to cross tube 5 over tube 7 and tube 4 over tube 2 as shown in Figure 4 Notice Lack of lubrication will make installation of the Upper Intake Manifold plenum difficult and may cause damage to the O ring 8 Lubricate the Fuel Meter Body Upper Manifold O ring blue in color with clean engine oil 9 Inspect Upper Intak
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