Directions: Highlights to GM’s Historic Anniversary
General Motors, which celebrates its 100-year anniversary this month, has provided the country and the automotive industry a rich and diverse history. Many achievements and some growing pains have occurred during this industry giant’s life. Here are just a few of these many industry-changing accomplishments. The staff at Underhood Service wishes General Motors another 100
Is There Enough Pressure? Fuel Injection Diagnosis & Service
One of the first questions that should always be asked — and answered — when diagnosing a fuel-related complaint on a fuel injected engine is, “What is the fuel pressure?” All too often, technicians assume fuel pressure is “good” without actually measuring it with a gauge. If the engine runs, they assume the injectors are
Bosch Celebrates 40th Anniversary of Fuel Injection, Supports System with 10,000 Related Components
Forty years since it introduced electronic fuel injection, Bosch continues to upgrade the technology as it supplies automobile manufacturers and the aftermarket around the world with the most advanced fuel injection systems available. Bosch provides the aftermarket with a comprehensive after sales service and replacement parts program ranging from the original D-Jetronic to the latest in Bosch technology systems.
Electronic Fuel Injection Turns 40, Remains Vital Technology for Vehicle Performance
It’s turning 40 this year, yet electronic fuel injection continues to be a viable technology extremely beneficial to our everyday driving experience. That’s hardly surprising, as it plays such a pivotal role in determining the smooth driving and performance most of us take for granted in our cars, vans or SUVs.
GMC/Chevy Light Truck: Central Port Fuel Injection Diagnosis
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). The system was used on 4.3L V6 Vortec engines through 1995, and was redesigned in 1996 and renamed “Central Sequential Fuel Injection” (CSFI). The system
Directions: Issues that Could Impact 2006
As we usher in a new year, we thought we would take a look into the ol’ crystal ball and try to see what issues technicians, shop owners and others associated with the aftermarket can expect in 2006. These are not ranked by order of importance, but as a guide to what one can expect
Today’s Fuel Pressure Diagnostics
Direct injection pressure is measured with sensors, and you’ll need a scan tool to measure the signals
GDI Fuel Pump Pressure Control (VIDEO)
A high-pressure direct injection fuel pump can vary the pressure to the injectors. Sponsored by Carter Fuel Systems.
Diagnosing Throttle-By-Wire Limp Modes
Throttle-by-wire allows engines to better utilize variable valve timing and direct injection for torque and power.
GM Engine Noises During Cold Start, Warm Engine Operation
The new Small Block Generation 5 engine family incorporates a new fuel system technology known as direct injection (DI).
