ok well i was driving today and my car been runmning weird so i drove it and it wouldnt run past 3.5 and it ran like ****. well it started having the idle from like 0-100-100-1000 and back so i pulled over and unplugged the thing in back of the intake manifold and tried to drive my car home it died and had to push it. i nothing it would just crank and crank but not turn over. i put in gas casue thats what i first thought and it wasnt. when i tried to start it again the battery light wasnt going on and the main relay wasnt clicking, no led light going off in the ecu. check the wiring and it all seems plugged in... im stuck on this one and if i cant fix this imma sell her.

and oh yea it was throwing a code 3 everynow and then, and a code 20??

 

Sounds like your main relay is the culprit. As you said in your post, you didn't hear the main relay click. Also, code 3 is your MAP sensor, which could be the reason for your car running crappy too. Check to see if it's plugged in and there is a vacuum hose plugged into it as well.

 

#3 is map sensor.
#20 is defective or unplugged circuit

You'll need to recheck your wiring. And after you plug and unplug everything (checking the connectors), take the ground off your battery for about 15 sec, allowing the ECU to reset. Report back after that.