my vehicle don't want to start, but the engine still cranks?

what is the crank sensor email me at teconchukmitchell@yahoo.com

i have a mazda mpv 1990 and it wouldnt start. it turns over but doesnt start. replaced ignition coil, distributor rotor, and got a used distributor and still didnt work. it turns out to be a bad part in the distributor. its the part in the distributor with two wires in it. luckily i had a extra distributor (from a used engine) and took out the electronic part in the distributor and it worked. the one i got from ebay was bad and my friend tested it and it was bad. the extra part fixed it. you can take out that part by taking out a screw from the middle of the shaft and that will give you a chance to pull out the electronic part of the distributor. symptoms of bad part was no spark from the coil or spark plug and no start due to bad distributor. you can get new or rebuild distributor but this is the cheapest way to fix it without putting in different parts by guessing