because i didnt have the 470uf cap i just plugged the ecu back into my jeep and hooked my ignition coil back up. fuel pump came on, it cranked for a few and was wanting to run but wouldnt idle. when i gave it some gas while cranking it, it would run, but not idle with my foot off the pedal. after about 3 minutes, it finally started to idle. i let it run for about 10 minutes.
so where does that leave me? do you think theres still something that needs to be changed out? (either the caps or the ignition coil) or do you think maybe something was just loose and i snugged it back down when i hooked everything back up?
It could be fuel, it could be tune up time. If it's changing cold to warm and you can get a good idle warm chances are one of the sensors are not giving the ecu what it needs. There is a sensor call the IAC that is responsible for idle along with the Throttle position sensor. I would start by cleaning the throttle body, IAC, and TPS and if it's been more than a few years give her a tune up with a new fuel filter, plugs, etc.
^^^ X2 what Que said. I always tell people to put a good tune up and check for codes first. So that way you know what you have, and a good base line to measure from. The tune makes a *huge* difference on these engines.
By the way, how the heck did you get the gunk off the top of the computer board?