Saying "its a sensor" is like saying "it's a problem with the engine." It's so vague it's no help.
When you say you know nothing about cars, it limits the help I can give considerably. If there is anyone you know who could help you, please get them to help.
The first thing you need to check for is fuel. On the top of the engine there is a valve that looks a lot like the air valve on your wheels. It is for testing fuel pressure. Unscrew the cap and press down on the center pin with the edge of a screwdriver or whatever you have that will fit. Shield your eyes because it should spray fuel. If it doesn't, you don't have fuel pressure, meaning that your fuel pump isn't pumping for some reason. If you find that this is the case, come back and let us know so we can tell you where to go next.
If you find that the fuel is there, you should check spark. The easiest way to do this is to unscrew one of the spark plugs from the engine. After you unscrew the plug from the engine, plug it back into the plug wire. Take the threaded part of the plug and touch it to any bare metal part of the engine or engine compartment. With it making contact with the bare metal, have someone turn the key and crank the engine. You should see spark across the gap of the plug.
These are two very rudimentary tests, not the proper ones a diagnostic tech would run, but good enough to get you started and, best of all, free. Let us know how it comes out.
__________________
2005 Excursion XLT 4x4 with 5.4 3V & 4R100
1989 F250 XLT Lariat SuperCab 4x2 with 460 & C6
1987 Crown Vic Two Door with 5.0 & AOD
1986 Yamaha V-Twin Virago 1100
For my sanity, please try to use punctuation and capitalization. I try to help the people who post, but it's impossible to do when the post is indecipherable.
| 
misfire .... 
Linear Mode
