Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Done this a lot. I will include instructions to do the conversion after the plemium(upper intake)is off. Let me know if you need the instructions for the removal of the plemium, or any other help you may need . Good Luck.
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).
Notice: Use caution when inserting injectors into lower intake manifold to be sure the correct injector is being placed into the correct hole.
Important: The Injector holes are numbered on the Lower Intake Manifold. The injectors are numbered on the side of the Fuel Meter Body.
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.
Important: Lubricate the Fuel Inlet and Return Lines with clean engine oil before inserting them in the of the Fuel Meter Body.
Cleaning Procedure Parts
Top Engine Cleaner (U.S.)
Top Engine Cleaner (Canada)
Port Fuel Injector Cleaner (U.S.)
Port Fuel Injector Cleaner (Canada)
CSFI to MFI Conversion Parts
V-6 MFI Assembly
V-6 Seal Kit
V-8 MFI Assembly
V-8 Seal Kit
Parts are currently available from GMSPO.
Easy to do. Here are the instructions:
Intake Manifold Replacement (Upper) Removal Procedure
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
Tighten Tighten the bolt to 15 N·m (11 lb ft).
Please let me know if you don't understand a step or have problem with a step.