Originally Posted by warrenp099
I'm still muckin with this issue. With the EGR disconnected there is a slight vibration around 1500 RPM but when I connect the EGR it gets alot worse. I have looked for a vacuum leak but can't seem to find one. Any ideas? This is driving me crazy. It wasn't doing this before the engine change which makes me wonder if something was hooked up wrong.
Have you checked to see if your Air Flow Sensor is opening properly. I ran across this while checking everything on my truck. Changed the sensor, now everything is fine. If the sensor is not opening properly it is messing with your air flow in and out of the truck. Let me know if that helped.