Elihtc

Hello everyone, first off I'd like to thank everyone who helped me with my last problem. I had an oil leak above the second turbo and was smoking quite a bit. The fitting was loose or bad so I replaced the brass rings and it stopped. The problem was I had to pull the motor to get to the damn turbo. I got everything back in without any extra pieces, but now at idle and only after warming up the motor pulses between 1200 and 1400 rpm. I suspect a vacume problem but after consulting the diagram and checking all the areas I can get to I am stuck. One other option may be that I didn't fill the radiator properly and the fast idle sensor isn't getting a good reading? I don't even know if this car has a fast idle sensor, but I don't have any other ideas. If anyone has anything to offer please help.
Thank You,
Eli James