Title pretty much says it all. Almost everytime I'm at a stoplight or start my truck up, it begins pulses of vibrations. You can't feel them unless you touch the dash and even then it is very light. Once I exit the cab and go outside I don't hear it at all. It's really confusing/annoying. Anyone know what this could be?

 

More info joe, how many miles? Mine was fuel pump going bad, not enough pressure . . Put gauge on test port under secondary filter housing.

 

It's got 198k miles. Been doing it since before I replaced my fuel pump/injectors at 196k. Funny thing is as soon as I give it has it goes away. And if you let off the gas, as soon as it hits 20 mph it will start again. I looked a little more on other fourms I'm a member of and a lot of people say it could be a loose turbo bolt or loose exhaust manifold. Other sources say maybe a part of the exhaust is touching the cab. Idk where it would be though? However my vibration is coming from my dash. That's the only thing I know about my case