direct injection Archives - UnderhoodService
Gasoline Direct Injection Is Better, But Not Perfect

GDI technology has improved but drivers could face problems if they don’t keep up with maintenance.

Direct Injection and Turbochargers

Making more power with less displacement puts additional stress on the engine.

VIDEO: GDI Safety Information

Direct fuel injection poses unique safety issues. This video is sponsored by Standard Motor Products.

Driveability Diagnostics And Direct Injection

Direct injection can be a diagnostic challenge, but with the right foundation, problems can be solved profitably.

VIDEO: Diagnosing Fuel System Leaks In GDI Systems

Jason Stahl discusses gasoline direct injection systems, and ways to prevent leaks in the system after a fuel pump or injector have been replaced. Sponsored by Standard.

GM Tech Tip: New Engine Noise During Cold Start-Up

The latest generation of full-size trucks and utilities incorporate a new generation of technologies not previously seen in a GM full-size truck and utility applications. These engines generate noises during cold start and during warm operation that technicians may not be familiar with.

Direct Injection Diagnostics: Taking Pressure Readings

Direct injection is becoming standard on more and more late-model vehicles. These systems can be a diagnostic challenge, but with the right foundation, problems can be solved profitably.

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VIDEO: Fuel Pump Replacement On GDI Engines

Andrew Markel offers several tips to make a GDI fuel pump replacement job easier and safer. Sponsored by Robert Bosch.

VIDEO: Gasoline Direct Injection (GDI) Carbon Deposits And The Synthetic Oil Connection

Conventional oil that has high volatility will cause more vapors and make carbon deposits worse. Synthetic oil with low volatility can reduce vapors and prevent carbon from forming on the valves. Sponsored by Auto Value and Bumper to Bumper.

Hyundai Fuel System And Emissions Diagnostics

Bob Dowie recently had a 2002 Elantra GLS in the shop. This vehicle is a good example of some common fuel trim and emissions problems you’ll see.

Valvoline Launches Fuel System Service For Direct-Injection Systems

Valvoline engineers have developed a groundbreaking solution for treating and restoring gasoline direct-injection fuel systems with the EasyGDI Fuel System Service featuring Power Dispersal Technology.

Induction Cleaning Service For Direct-Injection Vehicles

You may have seen it before: misfire codes, stumbling and suspicious fuel trim numbers. On a scan tool, the engine may show a loss in volumetric efficiency. The driver may complain about a loss of power, poor fuel economy, hard starts and a rough idle. But this is not a 12-year-old engine; it is only