Let me start of by informing yall that im a newb. I recently re done my pcv hose setup to rubber hoses and brass fittings on my 2000 Camaro SS because I had a vacuum leak. It ran like a champ for about 3 days and now it idles at about 400 to 600 rpms and is hard to crank when its cold because of the low idle. I replace the tps sensor and I did a tps relearn and its still running bad. The engine light is on but because of the hours I work I have a hard time making it to the local parts store to check the problem codes. What else can I check to fix the problem? Thanks for the help guys.

 

Both of my Z28s idle at 500 rpms normally