So I just bought a 2000 ZX2 for $700 last night. Body wise it needs a new rear strut that I have already ordered and it also needs a brake line ran to the rear left wheel, currently it has a crimped off line... Engine wise, it has the same issue as what seems like a lot of cars with the Zetech has, the rough idle. When I start the car it idles fine for a minute and then the idle drops and it starts chugging. The engine does not die and it does not affect how the car drives, it just sounds terrible. I have heard the fix for this can be as easy as reconnecting a vacuum line or as expensive as replacing the MAF sensor or the IACV or even the PCV. What are some things to look for when diagnosing this problem? Are there any specific vacuum lines in particular that I should be looking at? There are no codes showing and it runs great when driving, just idles terribly when sitting at a stoplight.