Vibration between 1000 rpm and 1800 rpm

[vjjack04]

I've notice my car (2008) has a vibration between 1000-1800 rpm. I notice it when with the clutch pushed in or with it out (but not in gear). When I drive off or on the throttle I can't tell if its there or not....
The balancer looks fine while its static, but I did not take a look at it while running. I will do that tomorrow.

 

[Steve-Indy]

Have you checked the oil and filter for metal bits or shavings ?

 

[vjjack04]

Woah, you went right to the worst case...no metal in the oil. I did, however, check the balancer, and it seems to be perfectly fine. I'm now thinking it may be mariginally misfiring at that rpm range. I check my spark plugs and they seem to be burning fine, but some decent carbon build up. They are 16 years old.

 

[Steve-Indy]

Not trying to alarm you...but I vaguely recall something a bit more subtle (at first) concerning 2008's with possible problematic yokes in the valve train which allowed some of the rollers to rotate 90 degrees and eat the camshaft.

Just one of many random thoughts.

 

[vjjack04]

Steve, thanks. Interesting. I imagine if that were the case (the lifters had turned) it would eat the thing up real fast. The car runs very well and I just replaced the spark plugs. The looked remarkably well, considering, they did look like the car has been driven most of its 18k miles a low RPM and short distances.

 

[Steve-Indy]

I sure am hoping that it is nothing major. Another sound/vibration that I remember being chased on Gen IV's was exhaust components making light contact with other surfaces...especially after modifications.

OK, I'll quit taking wild guesses now.

 

[vjjack04]

I think the car runs and drive good and I don't hear any other noise. I have had it up on the lift and can't find any issue. If it not the balancer, seems like it might be something associated with the throw-out bearing...