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V8-4.6L

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How do I turn off the wrench shaped light on the dash
You will need to have the vehicle computer scanned and diagnosed by a mechanic like one from YourMechanic that can come to you so you do not have to drive the vehicle before having the vehicle checked. The light means...
Question
Apparent timing chain failure.
Hello there, timing chains in most cases last a long time on your 2003 Ford Mustang. The fuel line repair should not have had anything to do with the timing chain issue. In cases where a timing chain is suspected...
Question
Low idle and stops, sometimes stalls at idle.
As you know, the idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. As this valve is controlled by the vehicle's computer,...
Question
What type of gas so I use?
Your truck should be perfectly fine running on 87 octane fuel. Generally, engines that use a higher compression ratio and/or use supercharging or turbocharging to force more air into the engine will require higher octane fuels. Increasing pressure in the...
Question
Truck jerks trying to change gear around 45mph
This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected...
Question
Engine ticking sounds, screech 2009 Ford F150
Hi there - while a screeching noise may be common, it is not "normal". An old belt, whether stretched or glazed, can cause screeching, a loose tensioner will allow belt slip (not good), worn idler bearings, crud in the grooves...
Question
Steering column
Hello there, adjusting, installing and working on your 1993 Mercury Grand Marquis is a delicate matter. The transmission linkage, and the gear selected cable are critical to the cars function and improper installation is a big problem. If you are...
Question
Serpentine belt, froze ac compressor
It is possible to bypass the compressor by removing the old compressor and installing a compressor bypass pulley. The pulley will bolt in the same location as the compressor. You may want to have the compressor pulley checked to see...
Question
Temperature reading hot cold air blowing out of vents both side set at 90 degrees. Northstar will I blow a head gasget??
Hello. It is likely if the vehicle is getting progressively hotter, that it is going to overheat sooner or later. The head gasket is one of the several components that can be a factor, but you will want to test...
Question
Po420 bank1
Hello Tom. P0420 is the Catalyst System Efficiency Below Threshold (Bank 1) code. While there are a multitude of components that can cause this code, the general concept is that your catalytic converter is not working properly. If you suspect...
Question
Engine overheated, liquid sprayed all over engine and other places.
Unfortunately, it would be difficult to say what exactly happened. From your description, the most likely case is a radiator or heater hose was loose or damaged. Cooling system hoses should not be wrapped with any kind of tape under...
Question
Car shakes while in idle and doesn't want to accelerate
The spark plugs are wet from trying to start the vehicle which is a good sign because this means that the motor is getting fuel. When the motor struggles to idle, this is generally a result of things like low...
Question
my son replaced a brake line on my cadillac deville 2001 but he cant seem to bleed them properly
Sometimes replacing a brake line or hose can cause the brake system to become air-bound. Try gravity bleeding the brake system first. With the brake fluid reservoir cap removed and the brake fluid level correct, loosen the bleeder screw at...
Question
Check system charge light
Hello. Thanks for writing in. The check charging system and battery light is illuminating because the battery or alternator is failing in some way, or the sensors that monitor them are failing. The battery may not be holding the charge,...
Question
Oil is leaking into spark plug wells
Hello. You are correct. There has likely been a gasket and, or grommet failure. The oil contaminates the plug and retards the spark. Hence the poor engine performance. It also causes the pressures to vary from normal and stresses out...
Question
2002 Grand Marquis rear suspension and tough steering
Hi there: If you have air suspension on your 2002 Grand Marquis, the issue might be mechanical as opposed to a sensor. To know for sure, you should have a professional mobile mechanic come to your home and complete a...
Question
What are the signsof a bad tensioner pulley?
The most common cause of noise in the front of the motor having to do with the accessories is the tensioner and idler pulley bearings get noisey. I have also seen where the a/c compressor pulley bearing gets noisey. You...
Question
Temperature spiking up after I changed my thermostat trying to get my heater to work.
The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you know, the heater core...
Question
why is my windows fogging up and i smell antifreeze
It has been my experience that this is normally a sign that a heater core has gone bad. It starts leaking coolant into the heater box, underneath the dash. When the heater is turned on, the air moving through the...
Question
Engine erratic behavior, misfiring hard starting every now and then
Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...

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