Re: mind of its own or vacuum leak?
Thanks for the reply. I'm not a mechanical idiot, but any tips on where I should look for the lines under the hood? Also, where might the check valve be, canister/reservoir, vacuum tree...
I'd really appreciate the help. I just spent $800 getting a blend door fixed on my 98 MGM, then 6 months later, my 06 MGM started doing this. The 06 had about 50K on it when I noticed this happening.
Might start up my own thread for this, but the problem is identical to Boscat's, just a different vehicle. 2006 Mercury Grand Marquis.