Went to the garage where my car is today. They readjusted the valves which werent that off but the car was still running rough. They hooked a computer up to it and the car no matter what runs really rich. What could do this? Could it be a bad ecu? How can I fix this?

 

if they are hooking up a scan tool to it its reading rich,thats normal b/c the car will never say either rich or lean,at idle its never 1 or the other.

aside from that,a bad oxygen sensor could cause it to run rich as well.

while they have the scan tool hooked up,hold it at 2,000 RPM's or so and see what it reads then. also while its hooked up,u can read the TPS voltage (i know on a Snap On u can anyway..) and see what it is,at idle it should be at about .54V


hope that helps

 

Try cleaning the TB and the IAC and the IAC housing too. That, if it is clogged, might cause it to run rough and possibly rich.