Q: Battery sparking when reconnecting

While starting your engine is as simple as turning the key and then releasing it once the engine is running, there are some things you should know. The following precautions will help prevent damage to your engine, as well as...

Hi! Since the power fuse was blown and your attempts to install a new fuse causes sparks, it would seem that there is a large draw or short on that power system. First, disconnect the ground cable to the battery...

Hello. It sounds like you may just have a bad brake switch (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-brake-light-switch) on the brake pedal. Both the brake lights and the shift lock use this switch. I usually remove the switch and test it with an ohm meter,...

Hey there, thanks for writing in about your 1997 Mercedes-Benz E300. This is also related to your other question regarding the coil springs. As explained, the perch is a structure that supports the coil springs. Often times, when one or...

The gas cap is the most common source of evaporative emissions, which would be a reason the check engine light would come on. The evaporative emissions system is designed to limit the evaporation of fumes from the fuel in your...

Hi there: Although it's impossible for me to know without inspecting the vehicle onsite, I'm not quite certain the compression issue is mechanical here. It's quite common after a head gasket change due to an overheating issue for the crankshaft...

Hi there. The amperage rating is not the power of an alternator but rather the output that it can handle. Either alternator will work on your vehicle with no problems. I recommend putting in what your vehicle came with stock,...

Check the harness to the crankshaft position sensor as it is has a fused wire completing the circuit. When unplugging the sensor, the engine should not start at all. The only thing that can cause the engine to start with...

Hello - I would try to replicate the noise with a linebacker friend or two throwing their weight on one front fender at a time. Your parts replacements thus far are the logical ones, and the ready-mounts (assuming they had...