Mark Houlahan
Tech Editor, Mustang Monthly
February 28, 2014
19 There’s no surprise that the Holley Terminator throttle body uses a standard carb linkage for connection to the accelerator pedal. Included adapters for various transmission linkages allowed us to easily reconnect the Lokar AOD transmission cable as well.
20 The Holley Terminator EFI fuel systems that include their new billet fuel pump include fittings to mount the 100 micron pre-filter directly to the pump, as seen here. The standard EFI fuel system packages feature either hose-barb or push-on hose fittings, which allow remote installation of the pre-filter.
21 Due to the overall length of the billet pump and pre-filter assembly mounting locations can be limited (every car is a bit different depending upon suspension, exhaust, chassis stiffening, and more). We found the fuel tank mounting flange behind the axle housing to offer generous room, protection, and a clean line routing.
22 If you’re using one of the two EFI fuel system kits that require AN hose assembly a set of AN wrenches and a pair of soft-jaw vise inserts will go a long way in making your hose assembly stress free. Check out the hose assembly guide we published in the February 2014 issue for more tips.
23 The EFI fuel systems Holley offers include 16 feet of fuel line, which is enough to plumb the pressure line in most applications. In order to complete the fuel system installation you’ll need additional line and fittings, based on your vehicle’s routing and choice of return location. We ordered 20 feet of matching Pro-Lite 350 hose (PN 352006ERL) and this trick ¼-inch NPT to AN -6 90-degree fitting (PN AT922144ERL) to plumb our return line directly into the Mustang’s fuel tank drain fitting.
24 Some installations you’ll run the pressure and return lines on the same side of the car (depends upon inlet/outlet locations on the engine, where you mount your regulator, and more). For this EFI swap we ran the pressure line on the driver’s side and the return line on the passenger side. The 10-micron post-filter was installed in the same left front framerail location as the owner’s carbureted fuel filter to minimize drilling new holes.
25 The return line routing on the right framerail/subframe connector required passing through the floor support (rather than hanging the hose down around it). A pair of holes were quickly located and drilled with a step-bit and grommets used to protect the hose routing.
26 Not included in the EFI or fuel system kits, but very much a necessity are these rubber cushioned “P-clamps” to secure the fuel lines to the vehicle. Holley’s Earl’s division sells them under PN 171008ERL (five per pack).
27 The billet fuel pressure regulator included in our fuel system kit includes the inlet/outlet AN -6 fittings and AN port plug shown installed here. You will need an AN -6 hose end fitting for the return line, so keep that in mind. You don’t want to have one fitting preventing you from finishing the installation. The sensor screwed into the regulator is included and tells the ECU what the fuel pressure is set at.
28 This photo was taken from under the car looking up at the passenger side inner fender behind the shock tower. The fuel pressure regulator was mounted here just below the hood hinge to keep the regulator tucked away from view, yet still allow access for fuel pressure adjustments.
29 The last part of the fuel system to plumb was the feed line from the sending unit to the pre-filter. Using the Earl’s Pro-Lite 350 hose made it easy, as the hose’s protective covering is much easier to compress with a standard hose clamp than stainless steel braid.
30 Like all self-learning EFI conversions there is a wide-band oxygen sensor that needs to be installed as part of the kit. The Holley sensor can be installed in either exhaust down pipe (we used the passenger side) and requires a 7⁄8-inch hole to be drilled. Again, a step-bit is your friend here.
31 Thread the wide-band oxygen sensor into the threaded adapter that will be welded into the hole that was just drilled. This will allow you to easily hold the adapter for welding.
32 Using a MIG welder tack the threaded adapter into place on the exhaust pipe. Once tacked into place remove the sensor and fully weld the fitting to the pipe. If you opt to have an exhaust shop do this work for you you’ll need an 18mm plug or an old spark plug to plug the opening until you perform your installation. Do not install the sensor and drive the car with the sensor unplugged, as it will damage the sensor.
33 The Holley Terminator throttle body is threaded for a standard ¼-20 carb stud. We swapped the stud from the owner’s Holley carb to the Terminator throttle body but it wasn’t long enough. For now we used a long ¼-20 bolt, but plan on buying a universal carb stud kit with your Terminator purchase.
34 With the Holley Terminator EFI system install complete and the owner’s original Ford Racing 13-inch chrome air cleaner assembly back in place most people would be hard pressed to realize this tidy small-block is now fuel injected!
35 Upon power up for the first time you’ll see the Holley logo and some communication messages. After a few seconds you should end up at the Terminator’s main tuning menu screen. From here you can adjust many variables, view and monitor inputs/outputs, and much more. You will want to run the setup wizard before doing anything else so a tune file can be written based on the choices you make for timing control, engine size, cam specs, and more.
36 Before starting the car for the first time the throttle position sensor (TPS) must be set for your pedal linkage/cable setup. To perform this step simply enter the Wizard screen and select TPS Autoset. From there the tuner will instruct you to move the accelerator pedal to wide-open-throttle a couple of times and then to click “OK.” Once these steps are performed you’ll see this screen. The TPS Autoset must be used any time the throttle stop screw is adjusted and the TPS no longer reads zero percent at idle.
37 The ability to monitor the EFI from the handheld offers a look at a multitude of inputs/outputs on specific screens. This is the sensor screen; there are several additional screens available by moving the thumb stick left or right. The handheld tuner also allows a full range of custom tuning, including controlling up to two cooling fans and disabling A/C compressor function at wide-open throttle.