This problem also causes the check engine warning light to illuminate. The ignition coil fails due to excessive spark plug gapĪn additional 151 people reported an ignition coil failure caused by an excessive spark plug gap. It costs $390 to $467 for spark plug replacement. The issue appears on model years 1997 through 2007. This affects the V8 engine, and Ford did issue a technical service bulletin. If any spark plugs are ejected, the spark plug port threads may need to be fixed or the cylinder head and cylinder head gasket might need to be replaced. explains that since the threads on the cylinder head are too short and soft, pressure in the engine is able to push the spark plugs out of place.
The check engine warning light will turn on. If this starts to happen, the engine will make tapping or knocking noises and start to misfire. Lets assume that I have the conventional system with the fuel regulator under the hood somewhere, would my fuel pump still have the check valve built onto it? or would you assume at that point a stuck injector? bottom line is with whatever system I have, when key is off, I read zero pressure on gage and confirm no pressure by hitting the Schrader valve on fuel rail with little to no gas coming out.The most common problem, which has been reported by 178 people, is that one or more spark plugs may be ejected from the cylinder head. I guess my first order of business is to try and figure out what fuel system has been installed on my 2001 expedition. all I can find is the damper ( the chrome piece that is built onto the fuel rail that looks like a regulator) I have notice that auto part stores do carry the regulators for my year but I was told that is because Ford as well as some other manufacturers makes changes during the model year and I could have 3 of the same vehicles and have possibly 3 different systems. Where is the fuel regulator? I have search up and down and cannot find the regulator. where do I go from here and what could be the issue here. which is a different question all in itself. Only other issue is small antifreeze leak where quick connect on hose connects to front heater core. if engine is running and I press on needle of valve, gas shoots out. if I remove pressure guage, shut engine off and push in on the schrader valve needle, no gas at all comes out. shut it off, pressure starts dropping toward zero. when I hook vacuum back up, pressure drops to 35 and stays as longs as expedition is running. if I remove vacuum from fuel regulator, pressure jumps to 45 psi and stays. if I hit gas fast and hard, pressure jumps to 40 psi then falls back to 35.
no leaks in pressure guage setup.If I start the suv, pressure jumps to 35 psi and maintains. it then starts to drop at a steady slow pace all the way back to zero. I turn key to on position and pressure jumps to 35 psi. after that, runs like a new one all day.Īfter sitting all night, I hooked fuel pressure guage up to schrader valve on fuel rail (which I am assuming is the schrader valve on passenger side fuel rail) and pressure reads zero. it runs rough and idles up and down for nomore then 20-30 seconds. Symptoms: on first start of the day after sitting all night, it starts after 5 seconds or so of cranking. ***please help**first I want to thank everyone in advance for their advice.Ģ001 expedition 5.4L engine eddie bauer with 94k miles
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