MULTI POINT or PORT FUEL INJECTION—MPFI (Multi Point Fuel Injection) uses an individual injector placed directly above the intake valve for each cylinder. This is the most commonly used type of system in today's vehicles. MPFI allows full compliance with OBDII requirements and produces less HC emissions on cold engine start ups. These systems also eliminate most fuel distribution problems since the fuel is injected directly on top of the the intake valve, and not mixed prior to that point. See similar questions...

Tuned Port Injection is a type of fuel injection which GM first used in 1985. It was used by some Camaros and Firebirds from 1985 until 1992, and by Corvettes from 1985 until 1991. It provides excellent driveability, throttle response, and great fuel economy. It has a relatively flat powerband, and makes great bottom and midrange power. However, a TPI engine begins to suffer near 4500 RPM, as the intake does not flow well enough to feed the engine's needs. See similar questions...

Fuel injection is a replacement for the carburetors that were around since the dawn of the automobile. There are many basic types of fuel injection, but we should start by saying what a fuel injector is - it's basically an atomizer, something that sprays a mist of gasoline into the air. This helps the gas to mix better with the air and stay in an even suspension, so that it burns more evenly and creates less pollution and more power. (Think of cooking spray vs. See similar questions...

Fuel Injection systems provide for the most part a very homogeneous air/fuel charge into your engines combustion chamber. It is also regulated to a stoichiometric air/fuel ratio of 14.7:1. This mixture requires that a very efficient and high energy spark be available to ignite this charge. We therefore do not recommend nor do we like to build any systems with a point ignition system. The most efficient ignition system for your vehicle is a fully electronic ECM controlled unit. See similar questions...

DIRECT INJECTION-- is a new technology that will be released from the auto companies within the next several years. Rumor has it that one of the Japanese manufacturer's will be producing a Direct Injection engine within the next three years. Direct Injection, like a diesel engine injects the fuel charge directly into the combustion chamber. There is much work to be done before it can be released, but most of the auto companies are working on some kind of prototypes right now. See similar questions...

Our first choice and recommendation in a fuel injection system is always a port or MPFI system. A lot depends on what you are looking to get with a fuel injection system and your budget. The best and most efficient type of fuel injection is MPFI. These systems provide the best air/fuel distribution and fuel control that in turn provides the most efficiency. MPFI also allows for different intake manifold designs allowing you to more closely tailor a system to your needs. See similar questions...

The biggest advantage of fuel injection is dependability and drivability. FI for the most part is relatively maintenance free once installed and working properly. The sensors are relatively robust and provide for many miles of maintenance free operation. FI also provides seamless drivability. The system takes care of all of your engine functions whether it is –20 deg. Or 100 deg. See similar questions...

This is one of the most frequently asked questions. All things being equal fuel injection in and of itself provides little or no improvement in power. That may be a shock to hear but is actually the truth with all things being equal. It also makes a difference what type of fuel injection you are using, TBI or MPFI. There are many people who make huge claims of power improvement with fuel injection, when in fact the improvement may have nothing to do with fuel injection. See similar questions...

Your fuel injection system will come with a pre programmed chip. This chip will be built as close as possible to your application. In some cases there is still more tuning that needs to be done of which we will send you a new chip to correct the situation. See similar questions...

All of our fuel injection systems are custom built. We do have some basic wiring harness lengths that are in stock and take less time to deliver. Depending on the time of year and current workload you can expect to see your system usually within 2 – 5 weeks from the date of order. See similar questions...

The different systems will take different amounts of time. An MPFI system requires an intake manifold change where as a TBI system usually does not unless you request a higher flow manifold. The most difficult part of the installation is usually the fuel pump. An external fuel pump is provided with your system that requires mounting near the fuel tank. More discussion on the fuel pump is included in fuel system modification requirements. See similar questions...

Trigger points are painful areas of muscle spasm. They can be treated with massage, muscle relaxant medications, meditation, and topical agents. If non-invasive treatments fail, the cycle of spasm causing damage which then causes more spasm and more damage can be broken with an injection. Typically, a local anaesthetic, like lidocaine, with or without a steroid, is injected into the knotted muscle. For the most difficult trigger points, Botox or Myobloc may be employed (see below). See similar questions...

Good question, some people believe that by installing fuel injection they will automatically get much better fuel economy. Fuel economy is a multifaceted and complicated subject. FI is only one part of the fuel economy equation. Aerodynamics, rolling resistance, brake drag, driving habits, driving conditions, engine rpm and accessory load all fit into the equation. If you are trying to move a 5000 pound brick down the road with a 4. See similar questions...

The most time consuming and hardest part of installing fuel injection is the installation of the electric fuel pump. You will need to install a fuel return line if you do not already have one. There is also an adapter available that can be installed into the fuel filler line for a fuel return. There are other options as well for a return as discussed in the "extreme" section. The fuel pump needs to be installed as close to the fuel tank as possible. See similar questions...

Our fuel injection systems are built around GM electronics for the most part. We use GM ECM's and all GM sensors. This allows for most service items of the system to be purchased from any parts store and/or GM dealer. Our wiring harnesses are custom built using Packard electronic s wire and connectors. The components are usually available also as service items. Our fuel pumps have a life time warranty and can also be found, sometimes by order, at many part stores. See similar questions...

Our systems are not "Fuel Injection for Dummies". If you know your way around a vehicle and understand the basics of vehicle operation and repair you should be able to install a fuel injection with no problem. If you are not well versed in a vehicle you may want to seek help or have a professional install the system for you. AFI can install a fuel injection system for you at additional cost. We are in Mid-Michigan and can make arrangements as needed for installation See similar questions...

THROTTLE BODY FUEL INJECTION-- The throttle body injection system is one of the first mass-produced fuel injection systems in the US auto industry, and is the most cost efficient system. If not for more stringent emission standards and second generation onboard diagnostics (OBDII), it more than likely would still be widely used. Some of the original designs were developed in the early 70's by GM's AC Delco division anticipating the upcoming emissions standards change. See similar questions...

The biggest modification that may need to be made is to provide a hole in the firewall to route the wiring harness. This will require about a 1 ½" hole for clearance needed to pass the connectors into the passenger compartment. A means to mount the ECM may also be necessary. Brackets, Velcro etc. are all possible means to mount the ECM in the vehicle. See similar questions...

If you want to meet emission standards and your vehicle was originally equipped with an air pump you may need to retain it. Fuel Injection many times does not require an air pump in all instances but some states require the original emission equipment to be retained. The pump will need to be controlled by the ECM which requires a special diverter valve to do this. If you are converting an old electronic carbureted system you may already have a usable diverter valve. See similar questions...

NBB maintains the largest library of Bioheat® fuel and Biodiesel information in the world. Most questions can be answered through a review of the information on the National Biodiesel Board website located www.biodiesel.org. If further information is desired, you can email your question to the NBB at info@biodiesel.org. See similar questions...