i bought an obd2 diagnostic computer with the hopes that it'll help me figure out some of the problems that i've been having recently. first, last week, truck starts out fine, then when i go to put it into drive, it dies.. when i go to restart it the wait to satart light and some of the other lights don't come on...now it's a crap shoot. the abs light stays on all the time...no error codes...the fuel pump relay wasn't in...again-no codes....any help?

What truck? Fill out your signature. What code reader? Is service engine light on?