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V8-5.4L

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Question
Misfire on coil one and two
It is possible that the coils were damaged by the bad plugs. The spark output of the coils may be bad on the two cylinders in question. If you want to chance it and only replace the spark plugs then...
Question
What could be the reason the front shakes when I go over 60mph.? Thank you for your help.
Hi...unbalanced wheels and tires, tire defects and bent wheels, and loose, worn out suspension parts are the typical causes of vehicle front end vibration at speed. It is also possible that loose, or defective, motor mounts can be a cause...
Question
How do I get to a 2004 Lincoln Navigator reverse light to change it?
Unfortunately, the rear hatch panel will need to be removed in order to gain access to the reverse light. This panel can be removed by loosening any screws that attach it to the vehicle. Then you can use a small...
Question
Leaking clear liquid
Hello. Leaks that expel clear fluid can come from a few different sources. If the vehicle already has known transmission issues, it may be possible that the leak is related to the transmission, even if the fluid that is leaking...
Question
P0604 code pops up. Check engine light is on and p2107 p2110 and u0100
Hi there. The code U0100 means that the ECM (computer) has lost communication. Check the battery and the battery cables and make sure that they are in good condition. Check the ground wires to the chassis and to the fuse...
Question
Where to troubleshoot fuel issue?
Hello, thank you for writing in. The issue could be any of the components you mentioned. There are several tests you can do, and you will want to pick the tests to perform first that are easiest for you to...
Question
My truck is overheating, I fixed the thermostat, went 10 blocks seemed fine. But then it started to overheat and smoke.
If you cannot find a leak anywhere on the engine and keep getting low on coolant then you need to have the engine cooling system pressure tested to see if you have blown a head gasket causing coolant to go...
Question
I think the anti-lock security on my car is active and it doesn't start.
Hi there. Look at the anti-theft system on the vehicle and see if the light is flashing. If the light is flashing, then remove the battery cables and leave them off for 13 minutes. While the cables are off, put...
Question
Yourmechanic does not service my area (Erin,TN 37061). Can you give me an estimate?
The cost will depend on several factors, one of which is whether you have the double overhead cam (DOHC) version of the 5.4L engine, that is 4 valves per cylinder. If you have the "regular" 5.4L engine, it takes 3.1...
Question
How do I tell the difference between an alternator issue and a starter issue?
If the starter motor is turning the engine over at adequate RPM, then you definitely do not have a starter motor issue. Even if you had a bad alternator (and the alternator should absolutely be tested, certainly when you install...
Question
Starting issue
New batteries are not always sold fully charged. Your battery might simply need to be charged. If the battery is fully charged and you have to piggy back additional power to get the starter motor to run adequately to start...
Question
4 wheel drive will not engage 2010 Ford F150 4WD
Hello - it sounds like the 4WD-High actuator is not successfully engaging High-range as expected. There are many possible causes, bad servo actuator, transfer gear mis-alignment, transfer shift fork wear. For assistance, I would recommend transfer case inspection by a...
Question
Won't start
You will need to look at the theft light to see if it goes out when you turn the key to the on position. If it does not go out then you may have a problem with the key or...
Question
Car wont start
Hello, thank you for writing in. The vehicle may be suffering from several different issues. There is most likely an issue with the charging system. This could mean that the battery, alternator, wiring, battery cables, or ground connection could be...
Question
Charging system
Hi There, You may have a failing voltage regulator that could be allowing the alternator to supply too much or too little amperage to the battery resulting in the battery never maintaining a consistent charge as it is designed to....
Question
My battery light is on and my check Charging system lite is on. My alternator and battery is new. It has to be something else's b
Hi There, You may have a failing voltage regulator that could be allowing the alternator to supply too much or too little amperage to the battery resulting in the battery never maintaining a consistent charge as it is designed to....
Question
On dash bord check charging system and battery light is on
Hi There, It sounds like you may have a weak battery, a failing voltage regulator or failing alternator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the...
Question
How long does it take to replace a axel/cv shaft assembly
On the 2006 Navigator, if a professional mechanic is replacing the axle(s), it is assumed to take about 1 hour to replace one axle (i.e., one side) whether it is the rear axle or the front axle. Replacing both axles...
Question
Miss fire cylinder 4
Hello and thank you for writing in. Engine misfires can be caused by many different problems and are generally caused by either a spark or fuel issue or in some cases, a combination of both. Spark related problems generally will...
Question
How come my outer wheel bearing keeps failing
If the outer bearings in the hub failed too quick then it is caused by lack of enough grease or the bearing was pre loaded too tight when installed or both. Make sure to use a good quality hi temp...

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