Vibration/hammering @ 1900 RPM

[Johnstra]

At around 1900 RPM I pick up a bit of vibration (or rather a hammering) that I can feel right through the throttle. I'm hesistant to call it a vibration because the frequency is a little too low. Doesn't feel like transmission or drivetrain; definitely feels like engine. Acceleration is smooth through this zone, but once I get over 2000 RPM it smooths out again. Don't know if this is normal. I've only noticed this in 6th; I'll try other gears. Anyone else experiencing this?

 

[timjones]

I think it's normal enough, mine does it normaly when there has been no load on it. like when you jump on the interstate empty and just cruse. but if there is a hill or a load where you make it work and get the water temp up it goes away, mine seems to to happen at 185* or less only, so I think it just injector timing.

 

[Prairie Dog]

Mine did the same thing when it was new but after 5 or 6 k it almost completely went away. It's totaly smooth now at 16K.



Scotty