Is this normal or what
 

I own a 84 944 for 2 years now. The car has only 60,000 miles on it. It drives excellent. What I am experiencing is despite the power and excellent handling there is a slight vibration everytime the car is between 3500 - 4000 rpm. Regardles of speed. Over 4000 rpmit drives smoothly. I tried several times to hit speed of 90mph and the vibration came up. At close to 100mph the vibration disappears. I only tried to keep it a little over a hundred but backed off early enough as dont see any reason to keep it at that speed. This is the only problem I am having with this car. I have read a lot of problems on 944 and I never heard anything like this. If anyone could give me any idea as to what it is or if it is normal I would really appreciate it. Other than that I love the car and I trust the car will get me from poing to point without problem.

Thanks to all you 944ners.

RE: Is this normal or what
 

Where is the vibration at? The steering wheel? The engine bay?

RE: Is this normal or what
 

The vibration comes from the engine bay. Thanks for yourhelp.

RE: Is this normal or what
 

Then either you have a balance shaft out of time, or bad engine mounts. Typically engine mounts make vibration at idle and go away up top, where as a balance shaft out of time is fine at idle, but crazy around 4k rpms.

RE: Is this normal or what
 

Thanks for the info. Ill try to have my balance shaft timing checked.

RE: Is this normal or what
 

I think Doc Wilen is right on, I had an '89 n/a with same symptoms and the balance shaft belt had skipped a tooth or two, as it was improperly retensioned 1500 miles or so after a new one was installed. If you don't know the age of the belt, you might want to have this looked at sooner than later.
PeterA