- 2005 MUSTANG 4.0 TESTING FUEL PUMP DRIVER MODULE FOR FREE
- 2005 MUSTANG 4.0 TESTING FUEL PUMP DRIVER MODULE HOW TO
Engine misfire – poor air/fuel mixture in the cylinders can cause an incomplete combustion event.Engine stutter, hesitation, stumbling – without the proper air/fuel mixture, the combustion inside the cylinders is impeded.Dirty, clogged, blocked, leaking or generally faulty fuel injectors have the following symptoms: So, in this article, I’ll try my best to help you understand how the various issues caused by dirty injectors present themselves and how you can learn to notice them in a timely manner.
2005 MUSTANG 4.0 TESTING FUEL PUMP DRIVER MODULE HOW TO
But how to tell if your fuel injectors are clogged? Or faulty?Įngine trouble is rarely easily identified, but there are symptoms for every issue, symptoms that everyone can learn to notice. The importance of cleaning clogged fuel injectors cannot be overstated. If the inertia switch has been jolted into shutting off the fuel pump, you'll feel a definite ‘click’ as you depress the button.There are many ways clogging can affect the injectors. Resetting the fuel pump inertia switch simply involves pushing down on the button located on top of the inertia switch till it bottoms out. On the majority of the vehicles covered by this tutorial, the inertia switch is located below the right side of the instrument panel, behind the trim panel. You should always check and reset the inertia switch and try starting the engine before testing the fuel pump. When an impact causes the fuel pump inertial switch to activate, the engine will stall (if it was running) or crank but not start due to a lack of fuel.Īlthough it's designed to activate during a severe impact caused by an automobile accident, sometimes it gets activated by less than severe impacts (and this happens a lot). Your 4.0L Ford Explorer (Aerostar, or Mercury Mountaineer) comes equipped with a fuel pump inertia switch, whose job is to cut power (or Ground) to the fuel pump in case of an impact. In the photo above, it's shown without its plastic cap. To be a bit mores specific, it's on the passenger side of the engine between the ignition coil pack and the upper radiator hose. The Schrader Valve, on the 4.0L Ford V6 engine is located on the injector fuel rail. Location Of The Fuel Pressure Schrader Valve Test Port
2005 MUSTANG 4.0 TESTING FUEL PUMP DRIVER MODULE FOR FREE
You can buy one or rent one (your local auto parts store, like AutoZone or O'Reilly Auto Parts will rent the fuel pressure gauge to you for free for a cash deposit which they'll return to you when you return the tool). The next test is to actually verify the fuel pressure with a fuel pressure gauge. Now, remember what I said about this test not being very accurate? Well, I suggest you do one more test. This usually means that a lack of fuel IS NOT the reason your car is not starting.
Your next step is buy or rent a fuel pressure gauge and actually check fuel pressure (your local auto parts store, like AutoZone or O'Reilly Auto Parts, will rent the fuel pressure gauge to you for free for a cash deposit which they'll return to you when you return the tool).ĬASE 2: The engine did not start, not even momentarily. But since we don't live in a perfect world, this could also mean a few other things like: the fuel pump fuse is blown, or the fuel pump relay is bad. Usually, this also means that the fuel pump is bad. This means that the root cause of your Ford vehicle's no-start is a lack of fuel. OK, let's find out what your results mean:ĬASE 1: The engine started and ran for a few seconds. You'll get one of two results with this test:ġ.) The engine will start momentarily and after a few seconds will die.Ģ.) The engine will only crank but not start at all.
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