Aftermarket fuel injection systems have been on the shelves for a number of years, but early systems had a variety of bugs and technical problems that turned do-it-yourselfers off to the idea of buying and installing an aftermarket EFI setup. In recent years, several of these systems have been vastly improved, with the majority of the problems eliminated. But the high cost of most systems, coupled with the need for expert laptop tuning, has kept these electronic fuel delivery systems from being at the top of most performance enthusiasts' list of parts to buy. The time and the complexity required to install a complete system was another high hurdle to overcome.
Now Professional Products has the Powerjection III EFI System that was specifically designed and engineered to overcome the annoying problems found in most aftermarket EFI units. This time, the unit and its brain are simple to install and self-learning. First, Professional Products addressed the cost. The typical over-the-counter retail cost of a Powerjection III system can be as little as $1,545 complete. The only possible option would be a P3 Fuel Delivery & Return Kit for about $242. This kit includes enough -06AN stainless braided hose, hose ends, and fittings to plumb both an inlet fuel line and a return line for cars over 500 hp.
Since one of the most expensive components in a system is the injectors, going from eight to four injectors substantially reduced the cost. The engineers miniaturized the computer and then cleverly mounted it directly on the throttle-body. This eliminated 90-percent of the wiring and connections involved, which further reduced costs. These cost reduction measures also contributed to the ease of installation. Mounting the EMS on the throttle-body eliminated the need to mount it under the dash and route the harness through the firewall to the engine. The MAP sensor is also integrated with the EMS, eliminating the need for a manifold swap. And depending on certain factors, such as the vehicle that the unit is being installed on, a complete install can be done in as little as three or four hours. An experienced mechanic can do it in two with no welding required.
Here's the complete Powerjection...
Here's the complete Powerjection III system. Compared to other aftermarket EFI systems it looks like a lot of parts are missing, but this is the complete kit and everything needed for installation is here.
This is the optional #70107...
This is the optional #70107 P3 Fuel Delivery and Return Kit. Our El Camino is factory equipped with a fuel return line so we didn't need to use this kit. Yes, even though this vehicle is carbureted, it did come from the factory with a fuel return line from the fuel pump back to the fuel tank.
The first step was installing...
The first step was installing the supplied EFI Fuel Pump, which comes with a trick mounting bracket that also doubles as a heat sink. The pump was mounted to a stamped steel cross member next to the gas tank using self-tapping sheet metal screws. The pump is spliced in between the tank and the factory fuel line going to the engine.
The next step was installing...
The next step was installing the O2 sensor. The boys at the EFI division of Professional Products came up with a really simple way to do this. No welding! Just drill a 5/8-inch hole in the exhaust pipe 6-to-12 inches back from where the head pipes come together.
Thread the O2 sensor into...
Thread the O2 sensor into the bung...
...and then clamp it to the...
...and then clamp it to the pipe with the supplied high temperature gasket and the two supplied stainless hose clamps.