[dBlast]

(04-22-2011, 12:14 PM)ZTWsquared Wrote: Just a flyer here ... but this actually happened to me on my 2.3 Fusion ... I installed the Steeda throttle body spacer and long story short - 3 months later the whole throttle body was loose (bogus lock nuts included with the Steeda kit didn't hold) ... so think beyond vac lines in terms of the leak.

You can check for vacuum leaks with brake cleaner or carb cleaner:
http://www.youtube.com/watch?v=mYa8rcHeN3A

Check near the intake manifold or TB. The cleaner will get sucked in where there is a leak and cause your idle to go up or down. The leak could cause havoc with your MAF readings and give your ECM a tough time finding correct idle.