Converting a AMC 304 V8 to Fuel Injection
Installing Throttle Body
This is day two. I inspected the intake install job, and things looked good.
Before I can install the throttle body, there is some assembly required. There is
less assembly in the two barrel version than the four barrel version. Assembly is simple.
My kit didn't come with an instruction booklet, but did come with a video, which is very
good and straight forward. It was supposed to come with a booklet, so I requested one later.
I had to attach the adapter plate to the throttle body, and assemble some of the wire connectors.
I also had to attach the fast idle solenoid & bracket. This all took less than 20 minutes,
even without instructions. I screwed the supplied studs into the intake, and set the throttle body onto
the intake. That's all there is to it!
Gas Lines
According to the video, you should have 5/16" steel gas line all the way, and
use hose that is approved for use with fuel injection, and only when necessary.
You should also do the same for the return line, since it is under pressure too.
I cheated pretty bad here, so don't follow my directions, even though it does
work :-) I have 5/16" steel gas line "most" of the way already and the return
is the same. The gas hose I used is normal gas hose opposed to expensive "Fuel Injection" hose.
According to the catalog that I saw at NAPA, their normal gas hose is rated at 50 psi for working pressure.
The Holley system uses between 12 and 22 psi, so I didn't change the existing hoses
and just ran new line where needed. I bent new steel line from the throttle body
down to the passenger fender. This is where the existing gas feed line comes from. I did the
same for the return line, which is on the drivers side. I put fittings in the
gas line near the throttle body to attach a fuel pressure gauge in both the supply and return lines.
You're supposed to put the pump near the tank, and mount it lower than the tank, but I was
feeling lazy, and didn't want do all that. I also don't think that putting the fuel pump as low as they request is a good
idea for a 4x4. I installed the fuel pump and filters on the passenger side
inner fender wall. Simple and easy. Plus it's easy to check for problems. The
kit comes with a long cable assembly to power the fuel pump, so now I have a
large coil of cable attached to the fender wall as well. Oh well. Fuel lines are
done. This took about three hours, most of that was spent deciding what I was
going to do with the fuel lines, and getting the material to do it with.
Wiring
It's a snap together thing. I did have to attach a couple of ring terminals and
female terminals on some of the leads, but it was super simple. There are
only 7 connections.
1 Fuel Pump
2 Temp. Sensor
3 Coil Wire Tap
4 Throttle Position Sensor
5 Fast Idol Solenoid
6 Throttle Body Power Cable
7 Electronic Control Unit
I had to drill a hole in the fire wall for the cables to pass through. They supply
a grommet. It took about an hour to connect all the wires.
