[shuttelbay1]

It's a 1990 APV. There are two electric units on top of the downdraft throats, spraying gasoline into the throats. There are no injector lines, no injectors in the head, and a standard air cleaner, if this is injected I've never seen a system like it. I just replaced the O2 sensor. Yes, it idles rough, and the center cylinder on the firewall side is not firing. I think I just cracked the heads though, because yesterday I overheated very rapidly and the started blowing huge clouds of steam out the exhaust. This engine is toast. The replacement engine only cost 250.00, I cant get a valve job done for that price. I just need to make sure that the 2003 Gran Prix/Malibu engine will bolt up. If this is indeed injected I won't have to add the computer, will I?
Thanks Kooterskkar!