I have a 2010 Civic and connected the battery terminals to jump a friend's car incorrectly. A couple sparks flew, but I haven't had any problems with my car. Should I check anything?

What do you mean by 'Jump the Distributor'?
If your jump starting the vehicle you use the battery terminals. Bypassing the distributor means it won't trigger the spark plugs in the correct order.

You have big problems, thank your friend and take it to the delaer.

I would go with the short in the battery idea if the cables were connected correctly. You'll have to switch out the battery with another to find out.

Alternator going out. It's a 2012, so it'll be covered under warranty. I would absolutely take it to the dealership (with someone following me). Don't run it, until you're ready to take it there. Once the battery dies, it's done. There's nothing charging it back up, so there will be no spark to the spark plugs.

My second thought (and don't get mad at me here) is that this can also happen if the vehicle was jumped off incorrectly (negative to positive/ v. v.).

Using jumper cables :
1. Connect one red clamp to the positive terminal (+) of running car's battery and the other end red clamp to the positive terminal (+) of the dead car's battery .
2. Connect one black clamp to the negative terminal (-) of running car's battery and the other end black clamp to the negative terminal (-) of the dead car's battery.
Basically... (+) to (+)...and... (-) to (-)
3. Crank up the car needing the jump.
4. Once car is jumped and running...remove clamps in reverse order.

Using battery pack: Connect in the same fashion as above.

dear,

Check for the loose connections.
I guess whie installing the main fuse has blown off....kindly look into it and get it replaced.

thanx

Usually it'll just blow a fuse, did you check all the main fuses also? in the engine bay. Check those first. Also the cables are probably shot, your going to have to use a different set.

Be ceratin you have jumper cables to correct terminals. Also, you may connect both jumper cables to the battery of the car your getting power from (be certain not to let other ends of cables touch) connect the positive lead of car being jumped to the battery's positive terminal, then connect the negative lead to the cars ground, not directly to the negative on the battery. Getting a spark when jumping is very common. You do not want to create the spark at the battery because the fumes from the battery acid can be explosive...... That can go very bad! When removing remove the grounded, to the jumped car, and then carefully remove the rest. Again be certain to not let the leads touch.

Please let me know if this had assited you,

Thanks,
Tom

Battery is toast. Replace.

Sounds like they connected the cables backwards,there maybe a direct fuse on the back of the stereo that got burnt up.If there's not a fuse on the stereo than its probably damaged beyond repair.