Question about 2003 Ford Expedition

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New plugs,new coils,new hoses,still chugs - 2003 Ford Expedition

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V6 or V8?
How many new coils and why?
Hoses have no bearing on drivability issues.
Any vacuum leaks?
Converter partially blocked?
Mil Light on dash and if so what codes are present?
Any codes previously,last year or two.
Shifting okey and tach doesn't flair or hang on shifts?
Clean Air Filter and Gas Filter?
Disconnect EGR Valve,plug hoses and test.

Posted on Aug 04, 2010

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Posted on Jan 02, 2017

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1 Answer

How do i fix a rough idle


High is normal, as the cold engine has thicker oil and does not vaporize fuel well, so needs to run faster until it warms up.
But the rough chugging sound could either be weak spark from arcing wires or coil packs, or could be a lean mixture. Lean mixtures could be from a stuck EGR or purge valve, that you can test by temporarily plugging them off. Or from a leaking hose that fell off, that you can try to pinpoint by listening for the hissing. Or low fuel pressure that you can test for with a fuel pressure gauge. A dirty fuel filter could cause that.

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98 expedition chugging


first, start with changing the vacuum hoses. if that doesn't work, move onto a system cleaning, they clean your lines and your carbirator. that fixed mine for awhile. but i also but a new manifold in it as well. but if none of that fixes it im not sure. mine is chugging as well right now, i think it is the air filter and spark plugs and wires.
Hope this helps

Jul 14, 2010 | 1998 Ford Expedition

1 Answer

I have a 2005 F150 5.4. It chugs and jerks into gears. I flushed trans and now it chugs and died in my driveway. I crank back up and it chugged while idle? Any thoughts


It sounds like it is possibly not the transmission at all. I would guess it to be either a fouled spark plug, which is quite common around 100k miles, or a coil that is bad. Check the coils first. If they coils test fine and the truck still chugs, take it to a shop to have them do the spark plugs. The spark plugs in this motor are not a job for an average mechanic. In that Triton motor, from my experience you will have a 50/50 chance of breaking the plugs off in the hole, and without proper tools, you will wish you had paid someone to do it. I've seen too many people learn this the hard way.

Dec 10, 2009 | 2005 Ford F-150

1 Answer

Chugging and running rough


check plugs, wires, and fuel filter, check all vacuum hoses for leaks or disconnection. If needed, use a test light, voltmeter, or ohmmeter and check the spark coming from all coil packs. You can also test the fuel pressure on the fuel rail on the test port that looks like a tire valve.
You can go to autozone.com and register for full free online repair manual.

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1 Answer

I have a 2001 Ford Focus, Manual, 118k that has chugging problems


it could be fuel pump problem plug leads ,coil pack

Oct 05, 2009 | 2001 Ford Focus

1 Answer

Egine chugs intermitently


sounds like it might be a vacuum problem check all the vacuum hoses and spray some wd40 around the base of the carburetor while idling. if the engine revs up then you have a carburetor base gasket problem or a leaking vacuum hose

Jan 10, 2009 | 1982 Ford F 150

1 Answer

Engine chugging


Sounds right. Either Coil pack(s) or MAF sensor. Buy one and swap it out until you find bad COP (coil on plug). Each spark plug has one and there is not really a good way to test under stress. MAF sensor is just past the intake air filter. You can buy a spray at the auto store to clean this, which may help. Don't touch the sensor itself (ith your finger) as this will ruin it. Just soak it with the spray.

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