Corvette C6 A-Pillar Fuel and Boost Gauge Installation
1. Check your gauges before you take them out of the packaging to make sure they are at 0
(zero) psi for both boost and fuel pressure.
2. Read through the instructions supplied with the gauges you purchased. These instructions
are how we install the gauges when you bring your car to us. There may be better, faster or
cheaper ways to do it, but this is what we have found to be the best.
3. In addition to the gauge pod and the boost and fuel pressure gauges, you will need two (2)
48" pieces of 16 gauge wire. (Preferably two different colors so you don't cross the wires.)
Electrical tape, soldering iron and heat shrink tubing.
4. We highly recommend soldering and heat shrinking all wiring connections mentioned in
these instructions
5. Connect the white wire from both lights together and also connect a wire about 48" to the
other side. This wire will go to a dimmer wire in a harness under the dash near the steering
column.
6. Find the loose black wire that comes off the fuel pressure gauge harness. This is the gauge
ground wire and will need to be shortened to around 12". Connect the black wire from
both lights together and also add the ground wire that you just shortened. Connect all 3 of
these wires to a piece of wire about 48". This will be your ground wire that will be fastened
under the dash near the steering column. You should have something similar to the photo
below.
7. Attach the nylon vacuum tubing and brass fitting that came with your gauge to the back of
the boost gauge. Attach the harness to the fuel pressure gauge. Attach both lights to the
gauges. Have the lines running out the face of the pod but don't push the gauges into the
pod yet.
8. Using some electrical tape, tape all the wires together for about 15". When you do this,
make sure to leave the gauges about 2-3 inches out of the pod so you will have room to
remove the gauges in the future should the need arise.
9. Push gauges all the way in the gauge pod and place the pod over the stock pillar. Do not
drill and mount the gauge pod over the stock pillar yet. Push the part of the wires that you
taped in between the side of the dash and the pillar.
10. Using a T-15 Torx bit, remove the two screws under the steering wheel.
(T-15 SCREWS UNDER STEERING WHEEL)
11. Pull out the gas/trunk button assembly and unplug the harnesses. Pull the panel out
towards you for it to unsnap. The opposite side has the engine start button. The wire going
to this button will need to be disconnected and then remove the panel from the vehicle.
(PULL OUT THIS BUTTON ASSEMBLY)
12. Locate the black 36-pin connector under the steering wheel. There are two yellow wires on
the harness. You will need to find out which one gets 12V when the key is set to "ON." Use
a test light or a volt meter to find the correct wire. When you have the correct wire, cut a
small strip of insulation off to solder and tape the red wire from the fuel gauge harness.
(You could also use a water resistant insulated crimp connector)
(USE A TEST LIGHT TO FIND THE CORRECT YELLOW WIRE)
13. Install a small ring terminal connector on the end of the ground wire. This needs to be
connected to a known good ground. We use a small self tapping screw to attach the wire to
the exposed metal cylinder on the left side of the 36-pin black harness.
(GROUND WIRE FIXED TO KNOWN GOOD GROUND)
14. Reach up behind the dash where the dimmer is located and disconnect the harness. Pull
the harness down and remove some of the electrical tape so you have room to connect to
one of the wires. Find the brown wire and cut a small strip of insulation off to solder and
tape the light wire from the gauges. (You could also use a water resistant insulated crimp
connector)
15. Remove the foot rest pedal by using a 10mm deep socket and wrench to remove the two
(2) nuts that hold the foot rest pedal.
16. Pull back on the plastic mat to reveal where the hood release wires enter the rubber
grommet. Drill a 7/8" hole about one inch below the cables.
(PEEL THIS FLAP BACK TO GAIN ACCESS FOR DRILLING)
17. Using a wire, coat hanger or fish tape, run the pressure sensor harness and nylon vacuum
line through the hole and into the engine bay. You will want the wires to come up by the
power brake booster assembly. Fill the hole around with silicone to create a waterproof
barrier.
18. Push the flap back down and reinstall the foot rest pedal. Reinstall the panel under the
steering wheel and reconnect the engine start button and the gas/trunk button harnesses
and reinsert into the panel.
19. Place the gauge pod over the stock pillar and find the best look and fit. Drill (4) 3/16" holes
and insert the small push pins that came with the pod. (you can get away with 3 if
necessary)
(3 PUSH PINS INSTALLED ON LEFT SIDE)
20. Place ΒΌ" high temperature wire loom over the wires going to the fuel pressure sensor from
the harness all the way down to where the wires exit the passenger cabin.
(1/4" WIRE LOOM INSTALLED)
21. Go to the driver side fuel rail and unscrew the black plastic cap that is on the end. This cap
covers the Schrader valve.
(UNSCREW PLASTIC BLACK CAP)
22. Put a rag under the end of the rail to catch any fuel that may leak out. Bleed any remaining
fuel pressure by depressing the Schrader valve. Using a valve core removal tool or a small
blade screwdriver, remove the valve core.
(SCHRADER VALVE CORE REMOVED)
23. Connect the supplied -4 to 1/8" NPT swivel fitting to the end of the fuel rail. Apply a small
amount of thread sealant on the pressure sensor and connect the sensor to the swivel
fitting. Turn the key to the "ON" position to see if you have any leaks coming from the new
connections.
(FUEL PRESSURE SENSOR & SWIVEL FITTING ATTACED TO DRIVER SIDE FUEL RAIL)
24. Rout the fuel pressure sensor wiring harness to the fuel pressure sensor. Run under the
coolant reservoir and then along the positive wire coming out the back of the alternator.
(ZIP TIE THE WIRE LOOM OUT OF THE WAY)
25. Go to the power brake booster and mark a spot on the vacuum hose for the metal "T" to be
inserted. If you already have a "T" in this line from the blowoff valve installation section of
the supercharger kit, you will just need to insert a nylon "Y" fitting to the line going down to
the blowoff valve to attach the boost gauge vacuum hose.
(MARK THE HOSE AND CUT FOR THE "T")
("T" INSERTED AND VACUUM HOSE ATTACHED)
26. Check all lines and connections and then start the vehicle.
Courtesy of A & A Corvette Performance, Ltd.