Check Fuel Pulse Width (FUEL PW) While Cranking

Purpose:To verify that the Fuel Delivery Command Signal (FDCS) system is functioning correctly. Recommended Procedure Connect OBDII Scan Tool to the data link connector (DLC) under the dash. Access FUEL PW PID on NGS Tester and monitor while cranking engine. No fuel command signal when ICP, RPM and VPWR signals are correct usually indicates a loss…

Charge Air Cooler – Leak Check

NOTE: The long term integrity of the charge air cooler system is the responsibility of the vehicle and component manufacturers; however, the following symptoms can be checked by any authorized repair location. Intake Manifold Pressure Check  Install pressure gauge, Part No. ST-1273, to the fitting in the turbocharger outlet.  Install another pressure gauge, Part No. ST-1273, in…

The Ugly Truth About Rolling Coal : Black Smoke

The Ugly Truth About Rolling Coal : Black Smoke

Often times we get questions about why someone’s well running diesel truck isn’t “rollin’ coal” or making black smoke. The simple answer is, the fact that you are not seeing any black smoke is a good thing. A properly running diesel engine should not have any smoke at all. Black smoke is an indication of restricted…

How to Save Time and Money with Online Auto Repair Manuals

Often, printed auto repair manuals provide only general information on a range of vehicles. Online auto repair manuals save you time and money …Just by selecting the make, year, model of your vehicle, you will immediately get all the updated information for your specific vehicle. Diagnostic Flow Charts, testing, inspection sections and factory Technical Service Bulletins(TSBs)….

How to Explain Split Fuel Injector Tips to Your Mom

How to Explain Split Fuel Injector Tips to Your Mom

Split injector tips are often caused by dry starts and there is also a theory about water in the fuel causing this. Splitting the injector tips are primarily caused by improper fuel system bleeding after servicing the fuel system, including a filter change or other issues where the injectors stop getting fuel.  Because “dry starts” cause…

7 Little Changes That’ll Make a Big Difference With Your Diesel

7 Little Changes That’ll Make a Big Difference With Your Diesel

Warm it up Diesel engines clatter when they are cold. This is because diesel engines rely on the heat generated by compressing air in the cylinders in the engine for the diesel to ignite, with a cold block and cold air, combustion is not very efficient. When you start a diesel engine for the first…

2 Common Reasons Diesel Fuel Injectors Fail (And How To Prevent It)

2 Common Reasons Diesel Fuel Injectors Fail (And How To Prevent It)

Why Do Diesel Fuel Injectors Fail? There are two major causes of diesel fuel injector failure associated with the properties of the fuel itself: excess wear and deposits. 1) Common Reasons Diesel Injectors Fail: Excessive Wear One mode of injector failure is excess wear. Prior to 2006, diesel fuels in the United States contained relatively…