Engine Performance problem
1998 Plymouth Voyager 6 cyl Two Wheel Drive Automatic 135000 miles
Grand Voyager 3.3L - Low, rough vibration when engine running but stopped in Drive - significantly reduced when put into Neutral or Park. Just had a tune-up (new sparks, wires, filters) and PVC. What should I be asking the next mechanic to look at? Thanks for an excellent resource, glad I found it!
If you ask them to look at something, that's what they're going to do. You need to tell them what the problem is and let them look for the cause. From your description, I'd start by looking at a mispositioned front engine mount rubbing metal on metal.
Exhaust components can make noises too if pipes are rubbing on the body or mounting brackets. Less common is a mis-positioned power steering hose transferring pump noise into the passenger compartment.