Q: Car stutters when you start it

Hi. There is a service bulletin from Kia for that exact description if your car is 4WD. It describes a sharp metallic ping when shifting from P to D and D to R. The repair is removing the rear driveshaft...

Try rotating the tires to see if the tires have a small flat spot. If the noise moves to the front then replace the tires. If the noise stays in the back then have the brake rotors (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-brake-rotor-disc) resurfaced or...

You will have to remove the center bolt. Once the bolt is removed, then using a harmonic pulley puller and locking the puller to the three bolt holes and running the center bolt in until the pulley and harmonic pulley...

Depending on the symptoms of the vehicle, this may be a transmission problem or a failing axle. Unfortunately, without additional detail as to the specific model of your vehicle, it may be difficult to diagnose without physically inspecting the vehicle....

Hi there. Try performing a snap throttle and see if the wave form changes on the Oscilloscope. If the waves do not change when performing a snap throttle, then the throttle position sensor on the pedal needs replaced. If the...

Hello - check for problem codes, whether the Check Engine light is on or not. Most auto parts stores will do this for free on a "time-available" basis. It is possible a component of the shift linkage (https://www.yourmechanic.com/question/gearshift-not-working) in the...

Hi There, This may be a sign of low transmission fluid (https://www.yourmechanic.com/services/transmission-fluid-service) or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer...

Hello - the Manifold Absolute Pressure (MAP) sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-manifold-absolute-pressure-sensor-map-sensor) is located on top of the intake manifold, in the middle. This will be between the valve cover and the firewall that separates the engine compartment from the passenger compartment. It's...

The problem sounds like the battery is too low to crank the engine and was most likely caused by the alternator not charging. You should have battery fully charged for at least 15 minutes and then see if it cranks...