Fuel System Archives - Page 8 of 12 - UnderhoodService
Getting Stoked to Service the 6.0L Power Stroke

If there were one engine that plagues the mid-size diesel world, you would have to say that it is the 6.0L Power Stroke. The 6.0L came into existence because the EPA demanded tighter emissions laws for diesel engines. Even though the 7.3L was branded as the reliable workhorse for Ford, it would never be able to pass the tighter emissions laws that were going to come into effect for 2004.

New Fuel Pump Assembly Packaging from Spectra Premium

Spectra Premium has unveiled new fuel pump assembly packaging, which the company says features more rigid internal protection and offers up to 32 percent in shelf space savings.

Tech Tip: Nissan Fuel Gauge Issues and/or DTC P0461, P0462 or P0463

If you confirm the fuel gauge is erratic, inaccurate or inoperative and/or the MIL is on with DTC P0461, P0462 or P0463 stored in self-diagnosis, replace the fuel lever sensor unit.

Diagnostic Solutions: Testing Fuel Delivery Systems – Checking the Basics First Can Facilitate Diagnostic Strategy

Vehicle fuel delivery technology has evolved to include conventional, pulse-modulated and direct fuel injection systems, with each having a specific set of components and testing issues. Gary Goms explains how to avoid some of the most common mistakes in diagnosing fuel delivery systems.

Service Solutions: The ‘CKP’ Script

The signal of the position or rotation speed of the crankshaft position sensor (CKP) contains a lot of information about the engine. When the engine is operating, the engine cylinders push on the crankshaft journal. This is why the crankshaft briefly accelerates after top dead center (TDC) on the expansion (or combustion) stroke. If the fuel did not ignite in the cylinder there would no acceleration.

Tech Tip: Ford Ticking Noise at Idle

Some 2008-’10 Focus vehicles built on or before December 23, 2009 may exhibit a ticking noise from the fuel rail or injectors at idle.

Pulling Codes: Mean and Lean with Shades of Gray

This article will document the infamous P0171 code – Lean Condition. A fuel system lean condition can be broken down into three subsections, namely, fuel pump performance, fuel quality and injectors. Keep in mind this is only a starting point, but it is a good place to start.

Tech Tip: Volkswagen’s MIL On with DTC P129F/P310B Set

Due to fuel intrusion into the low pressure side fuel pressure sensor (G410), a false signal may be sent to the ECM resulting in a reading that is out of tolerance. A false signal may result in illumination of the malfunction indicator lamp (MIL) and DTC P129F or P310B being stored in fault memory. There is now an improved fuel pressure sensor (G410) to aid against fuel intrusion.

Tech Tip: Mazda6 Engine Won’t Start in Cold Weather

In extremely cold weather (approximately -30 degrees C), a customer may experience an engine no start/no crank

Tool Tip: Prepare to Repair: The Importance of Equipment Maintenance

Situation A commercial vehicle — a 1996 Chevrolet 3500 van — was recently brought in for service with the customer complaining of low fuel pressure. The vehicle had recently had its fuel module and fuel pressure regulator replaced, due to a low fuel pressure concern and the vehicle was still ­experiencing the same issue. Procedure

Tech Tip: DeLorean Fuel Pump Replacement

DeLorean owners and enthusiasts know to be wary, a car left sitting that long and havoc ensues with the sensitive fuel system of a 25-year-old DeLorean. In fact, any car, left sitting for a lengthy period of time will eventually encounter fuel problems. One specific problem to note would be the need for a new fuel pump. Cars left sitting, and even daily drivers, can fall victim to fuel pump failure. Over time, debris and contaminants build up in the fuel tank.

Tech Feature: Common Rail Systems May Soon Be Commonplace

Due to the conflict between consumer performance demands and more stringent EPA standards, the use of