3C1700 - Nissan CAN Flex Fuel Kit
3C1600 – Nissan CAN Flex Fuel Kit
Nissan GTR 2008 - 2018
Congratulations on your purchase of the COBB Tuning Nissan CAN Flex FUel Kit! The following instructions will assist you through the installation process. Please read them BEFORE beginning the install to familiarize yourself with the steps and tools needed. If you feel you cannot properly perform this installation, we HIGHLY recommend you take the vehicle to a qualified and experienced automotive technician.
IMPORTANT! Installing this kit will require custom tuning or utilizing an appropriate Stage Power Package map if you have a matching mechanical configuration. Please consult with COBB or an authorized ProTuner in your area if you have any questions!
Table of Contents
Parts List
Flex Fuel Sensor Mounting Plate
Flex Fuel Sensor
-6AN male to 3/8" SAE Quick Disconnect fitting
52F Fuel Injection Clamp
(2) 6x12mm flanged bolt
Gateway Input Harness
FPR to Return Fuel Line
Fuel Rail to Sensor Fuel Line
Coolant Hose Separator
Tools Needed
Phillips head screwdriver
Flathead screwdriver
3/8" ratchet
3/8" 10mm socket
3/8" 12mm socket
3/8" 12" extension
3/8" 6" extension
3/8" 5mm Hex Key or Hex Socket
Trim removal tool
Needlenose pliers
Rag or cloth to absorb fuel
Stock Component Removal
With your car parked in a flat, level area go ahead and remove the fuel cap. This process should release most of the pressure built up into the fuel system.
Popping open the battery cover, Using a 10mm wrench, unhook the negative terminal of the battery.
On the passenger's side (USDM) locate these fuel lines. Unclip the lines from the retaining bracket.
Unbolt the bracket using a 10mm socket.
With the bracket removed, pop out the center metal insert and the rubber bushing. Then insert them into the COBB Flex Fuel Sensor Assembly.
Now squeeze the plastic clips on the hose retainer and install it onto the flex fuel unit.
With a 5mm Allen wrench or socket, remove the engine cover. Make sure not to lose the metal spacers out of the bottom as digging things out of the engine bay can be a huge pain!
Using pliers to loosen the hose clamps, remove all of the vacuum lines on the intake manifold, there should be 3 on the driver's side (USDM) and one on the passenger's side along with one in the back.
Using a Philips screwdriver (or a 7mm / 8mm socket depending on the clamp) loosen the throttle body coupler
Note: On 2008-09 MY vehicles there will be a coolant line attached to each throttle body, for this reason in many instances it's easier to unbolt the throttle body from the manifold itself, in which case you can simply skip step 5 and 6Using a small pick or your fingers, unhook the wiring for the throttle body by depressing the connection and carefully pulling out on the connector.
Using pliers squeeze the clamp together for the recirculation pipe, and pull the tube off of the bypass-valve, once done you can wiggle the whole tube free and roll it to the side and out of the way.
With the charge pipes out of the way unhook the MAP sensor on the passenger's side of the manifold.
Using a trim pry tool, carefully pop the wire ties out of their mounts on the back of the manifold.
Depressing the clip in the center of the hole, pull up on the harness so that it is no longer attached to the mount.
Moving over to the front of the intake manifold, unbolt the two 10mm bolts holding the cross-over pipe in place and gently pull it out of the way. Pulling the check valve out of one end of the line can make it easier to get fully out of the way.
Using a 10mm socket, remove the 8 bolts holding the upper half of the intake manifold on. Once done, carefully remove making sure not to pull on any harnesses or lines.
Disconnect the return line at the firewall connection. You can do this by squeezing the two tabs on the end in and pulling out. It's usually a good idea to have a rag to catch any residual fuel in the line.
Go ahead and remove these 3 12mm bolts and pull out the return line and fuel pressure regulator as a unit. (It's not necessary to remove the entire fuel rail)
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