I have a MY2004 w/ the Comptech SC w/ AC. I installed the kit over the weekend and everything has been great. The past two days however, I have thrown a CEL for the air pump system. When I start the car, I hear the air pump come on - but then the CEL comes on and I never hear it shut down.

Just wondering what could be the culprit and if anyone else has experienced this problem - thanks.

 

Check all your wiring and check all your vacuum line plumbing. It's most likely the vacuum tubes that were altered for the S/C install. You may have them crossed or loose or pinched off or put the check valve on backwards or spliced into the line at the wrong place.
You may not hear the pump go off when it actually did. To test this out, next time you do a cold start, have someone listening right at the left front tire. They'll hear the thing start up, run and should hear it shut off better than you sitting in the driver's seat. It can take a couple of minutes before it shuts off.

 

Your vac lines are routed wrong. The little part that has two on the top that you had to relocate from the stock air box need to be reversed.