Little info big problem

[seasonalskier2006]

ok so my little bro wants to get a car, the problem is, it idles rough whenever you get it on low rpms, all i have to go on is that and that it is a 3.0 liter engine its a 2000 contour, aftermarket svt. Built by buckshot (if that means anything to yall, i dont know). I wanna think its the MAF but i am not too shure, any other ideas?? and how much is it to fix it on the contour i gotta taurus so i know the taurii prices arnt that good, thanks for the time! Btw, only about 10K on the engine.

[beyondloadedSE]

Only people that will know about buckshot (Rick Blackford) are people from www.contour.org. Theres about 3 of us over here that just help the newbs out. Both myself and Rick are moderators over on the CEG forums. He actually built my motor for my turbo setup. Great guy.

Anyways, to me it sounds like a minor vacuum leak or a PCV issue. I know it can be hard to remember where everything goes back together when you do a 3.0L swap. The MAF shouldnt be an issue.

[seasonalskier2006]

ok, well how would i go about finding where the leak would be, i seem to remember something about how to do it but i wanna know from yall. Thanks!

[beyondloadedSE]

Originally Posted by seasonalskier2006

ok, well how would i go about finding where the leak would be, i seem to remember something about how to do it but i wanna know from yall. Thanks!

Well, generally if its an intake leak you can hear it. Hopefully you replaced all the gaskets when you replaced the engine. The intake manifold gaskets get pretty nasty over time and its recommended you replace them even if you pull the UIM/LIM. Check the other gaskets connecting to the manifold like the throttle body, EGR, IAC. Generally you can just put your head down by it and listen. Make sure the brass pipe coming off the bottom of the upper intake manifold below the throttle body has the rubber tube tightly secured. That one is easy to miss. Make sure the two plastic hoses running to the top of the manifold (right after throttle body) are secure. Sometimes the plastic quick-connects become brittle. Do the RPM's studder and then rise back up to say 2K RPMs or so?