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It appears that you may actually be experiencing two different issues with your Mustang. I do not believe the two are related so we will look at each concern independently. In regards to the rear window defroster, it is quite...

Both the alternator and battery should be checked for proper operation. After being jump-started, the car should continue to run, even if the battery is dead (unless the battery has an internal short). The alternator should produce enough power to...

Unfortunately, there is no way to tell without doing some more testing. The timing and small details about the noises you are hearing may make a huge difference in diagnosing the issue. Lifters will make more of a "clicking"...

Hi there. Check the wiring from the horn button to the horn and see if there is any loose wiring or any shorted wires. If all the wiring looks good, then the issue is within the steering column. The horn...

Hi There, It sounds like you may have a faulty connection or potentially a faulty starter relay not allowing power to be sent to the starter solenoid. The starter relay directs power from the battery to the starter solenoid which...

A problem, in your circumstance, is if you let you the check engine light stay illuminated, by failing to address this EVAP leak, you will not in the future get notice of new issues if they arise. Fault codes will...

Your throttle position sensor says it is on the throttle body assembly. Look at the gas pedal position sensor, above the gas pedal, to see if this is the sensor the parts store gave you. This sensor is called the...

First I would revisit the plugs and coils. there is always the possibility that something didn't hook up properly. Pay close attention to the ground wires. They are the brown wires that emerge from the harness at seeming random places...

If the front brakes are locking up you need to open the bleeder on a caliper to see if the wheel can then be turned. If you can now turn it then you may have bad front brake lines that...

Hi there. If you hear a click, then the first thing I typically do is find where that click is coming from. Most of the time, the clock is the starter trying to engage but it is unable to crank...

Hello. From what you describe, it would appear to me that your vehicle may be experiencing some sort of electrical or wiring issue. It may be possible that once the temperature reaches a certain point either a component or wire...

If you can get more for the car as a trade in, after you replace the radiator, than what a junk yard will give you for junking it, then I'd recommend fixing or replacing the radiator and use it as...

Hello. There are a few problems that can cause this. If there is the correct fuel pressure and if there is compression, then the sensors need to be checked with a scan tool to see if any of them are...

Hi, thanks for writing in. Check the oil filter to see if it is wet with oil. If it is then the oil filter gasket from the old oil filter was not removed, causing the new oil filter to not...

The oil leak from your valve cover is generally caused by a failing valve cover gasket that is not properly sealing or a valve cover that is not properly torqued down. I would suggest having an expert from YourMechanic come...

Check all of the sensors and make sure that they are plugged in all the way. The computer system with the sensors are designed to adjust themselves as elevation changes. This is why all vehicles today have computers in them...

Hello. If your vehicle will not start after you washed the engine bay then it may be possible that something may have gotten wet. The first thing I would do is check to see that there is no moisture in...

Unfortunately, this is an issue that will require the transmission ECU to be diagnosed using a scanning too specific to this in order to determine what the cause or issue is. This is a common issue on the BMW transmission...

Since you have replaced so many parts , it would be very difficult to determine what exactly is causing this without performing a physical inspection. I wouild stronly recommend having your vehicle inspected by a qualified professional to trace down...

Sometimes inexpensive brake pads will squeal even when new. Something you can try is to use some anti-brake squeal spray or lube designed for the backing plates of the brake pads. These can help with the high frequency vibrations that...

If the rear passenger side wheel speed sensor is reading 0 mph, when the other wheels read 10 mph, you already have done most of the diagnosis. The sensor reading depends on the sensor wheel located inside of the rear...

Hello. I usually start by checking to see if the thermostat is opening as it should and see if the engine cooling fan is functioning. If the fan is not turning on, then that needs to be repaired. If the...