when cruising around 45 mph without my foot on the accelerator, sometimes the needle on the vac side of my boost gage will go from 20 to 14, it will kind of jump and then go back down. what is happening??
does the car idle funny at all. it could be a vacuum leak. so let me get this staight, your going 45mph and you still get 20" of vacuum. that seems kinda high, but anyways. it could be a leak, or maybe one of your lines is messed up. did you find anything under the hood at all.