Some pranks. I am not liable, but here are a few. Some are from sites that copied and pasted.
OK for this prank you need a friends car, some confetti, and one of those windsheild cover things. take the windseild cover when itd folded up and unfold it a tad. pour the confetti inside it and fold it back up. when ur friend parks the car somewhere and opens it up the confetti will fly everywhere. i did this to my brother once and for some reason he didnt know it was me.
If you do not like someone who has a car here is an excellent prank. This prank will make a car smoke more than if the engine was dying or the oil was getting old. All you need to do for this prank is any kind of automatic transmission fluid.I reccomend about 2-3 quarts depending on the size of the tank. All you have to do is pour the couple of courts into the gas tank and when the person starts the car up and drives it away the car will smoke like you have never seen a car smoke before. This is probably the best prank to do to a car without harming it. All the cars I have seen it done to have not problems afterwards, this prank will not harm the engine or any part of the car. Why I think this prank is so good is because the people will see the smoke while they are driving and they will panick pull over and call for help. Its funny when they go to the repair shop and look like an idiot because nothing is wrong with their car. Good luck and be ready to laugh your balls off.
ake a long, narrow potato (one that will fit well into an exhaust pipe) and drill a hole in it long ways. Then put a whistle in one end of the potato. Put the potato in someones exhaust pipe. When the person gets in the car and starts it up they'll wonder what is wrong with their car.
So u put a sign on somebodys car that says "sorry I hit you im late for an appointment but i promise i'll pay for all the damage" the victim will spend the rest of the day paranoid.
i did this on one of my teachers that i h8 i spyed on him and he looked arouned trying to find a mark for almost 10 minutes, he was even laying on the ground looking.
A little flour or talcum powder in the defroster vent could be very dangerous.
But that cloud of flour coming up when someone turns on the defroster might make a great prank. Especially if you turned on the blower full blast so that when someone starts the car, they get a big *POOF*
Get some canned meat, open it and put it under there seat. A few days will go by and the smell will be terrible.
Get temp color hair spray (the cheap washable kind you use for sporting events or costumes). Spray their car with it like spray paint. It all will wash off.
You could get some washers or a lead weight. Then use some tape and put it on the inside of his rim. It will give the apperance that his tire is very out of balance. He might see it or not and take it to a shop and pay for someone to look at it. You can also put the washers and nuts in the hub caps.
Or (Works on some ODBII ECU's) disconnect the Air Intake Temp sensor or something else. Start the car and then turn it off and plug that back sensor back in. The computer will give hime a CEL. You can erase the code by disconnecting the battery for about 30 minutes and then reconnect the battery (DO NOT TRY THIS ON AN Airbag System! This cannot be reset with out taking it to the dealership $$$).
Grab a plastic bag and grab some dog crap. Hopefully fresh and plyable. Make it to a patty and freeze it in the bag. Now once frozen take it out of the bag (gloves are a must) and put it on the catalytic converter or muffler. It will stink.
More advance and dangerous. Take a couple cans of shaving cream and get a hold of Liquid Nitrogen. Carefully freeze the can and crack it open. (This could be a ticking bomb becareful). You will peel the container from the foam. The foam should be frozen solid. Make sure the windows are all up and the A/C system is set to recirculate the Air inside the car (this will seal the car better). Now put the foam in various parts of the car. When the foam warms up it should be fine. Once that person opens the door. The foam will explode covering the entire inside of the car.
Bologna, can mess up the paint on the car and is perminate. You could put some on the hood and let it set in the sun. They will remove it and the paint too.