![]() Direct injection is prone to carbon build-up on the valves and injectors. With the location of the injectors, there is no fuel to clean the valves. The fuel injectors are located in the combustion chamber.Due to cost and complexity, it is usually only found as original equipment. It offers huge gains when paired with variable valve timing and forced induction. Direct injectionĭirect injection works like sequential multi-port injection except fuel is injected directly into the cylinder. The system was used on 4. As rpm gets higher, there is very little difference between sequential and batch fire multi-port injection. Under Pressure Back in 1992, General Motors introduced a new type of fuel injection system known as Central Port Injection (CPI), which GM also refers to as Central Multi-point Fuel Injection (CMFI). Sequential injection mainly benefits low-rpm operation. Each fuel injector is timed to fire just as the intake valve is opening (sequentially).It is a little more efficient and lowers emissions even further. Like multi-port injection there are one or two injectors per cylinder and only air goes through the throttle body. Sequential Multi-Port Injection is an upgrade to multi-port injection. Fuel puddling in the manifold is eliminated. With MPI, each cylinder gets the same amount of fuel. The injectors fire at the same time during the intake stroke.The fuel injectors are in the intake manifold near the intake ports.Some performance setups will have two injectors per cylinder. There will usually be one injector for each cylinder. In Multi-Port Injection, only air flows through the throttle body. The cooling effect of the air/fuel mix going through the intake can cause fuel to puddle in the manifold. Like a carburetor, cylinders farthest from the center of the intake manifold will get a little less fuel. The injectors are fired in fast pulses that vary with engine RPM.The fuel injectors are mounted in the throttle body.TBI is the most cost-effective way to upgrade to fuel injection. Some performance setups may have up to eight. There are three types of multi-point injection systems which include: Batched MPFI system Simultaneous MPFI system Sequential MPFI system. There will usually be between one and four injectors. Throttle Body Injection looks like a carburetor. They will also have one or more fuel injectors to provide fuel. has you covered no matter what type of GM vehicle you drive.Every fuel injection system will have a throttle body with a butterfly valve. We have the OEM GM parts and accessories you need at the wholesale prices. is your prime online source with the biggest and best selection of genuine GM parts and accessories at giant discounted prices. Affordable, reliable and built to last, GM part # 12592648 Sequential Multiport Fuel Injector Assembly stands out as the smart option. It fits Chevrolet Impala, Malibu, Monte Carlo. This part fits specific Buick Lucerne, Terraza models. OEM GM parts are the best for restoring your vehicle to factory condition performance. and are backed by the manufacturer's 12 month, 12,000 mile warranty. Our GM parts and accessories are expedited directly from authorized GM dealers strategically located all across the U.S. It is sometimes referred to as GM Fuel Injector. To ensure reliability, purchase GM part # 12592648 Sequential Multiport Fuel Injector Assembly. Your vehicle deserves only genuine OEM GM parts and accessories. HYBRID 4 DOOR NOTCHBACK, XE 4 DOOR NOTCHBACK, XR 4 DOOR NOTCHBACK GT 2 DOOR CONVERTIBLE, GT 2 DOOR NOTCHBACK, GT 4 DOOR NOTCHBACK, GTP 2 DOOR CONVERTIBL, GTP 2 DOOR NOTCHBACK, GXP 2 DOOR NOTCHBACK, GXP 4 DOOR NOTCHBACK, SE 4 DOOR NOTCHBACK, SE1 2 DOOR NOTCHBACK, SE1 4 DOOR NOTCHBACK CX 4 DOOR, CXL 4 DOOR, V6 CX/CXL 4 DOOR, V8 CXL/SUPER 4 DOORĤ DOOR HATCHBACK, 4 DOOR HYBRID, 4 DOOR NOTCHBACK, BASE 4 DOOR NOTCHBACK, LS 4 DOOR HATCHBACK, LS 4 DOOR NOTCHBACK, LT 4 DOOR HATCHBACK, LT 4 DOOR NOTCHBACK, LTZ 4 DOOR HATCHBACK, LTZ 4 DOOR NOTCHBACK, MAXX SS 4 DOOR HATCHBACK, SS 4 DOOR NOTCHBACKĬROSSOVER SPORT VAN, CROSSOVER SPORT VAN EXTENDED ![]()
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