I just did my deletes last Thursday...........I drove about 50 miles, came home and changed out my fuel filter. Not sure if any of this is related, but now I have a strange vibration/shutter at about 720 rpm. Has anybody else had this issue? What can it be. Seems like it's coming from the motor. Maybe just the new exhaust? You can feel it and even hear it a bit. Please.......any thoughts or suggestions would be great.

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Hey Diesel Pap....Thanks for the advise! I'll try cleaning the Map sensor. I'll let you know!

 

Is this vibration under heavy acceleration?

 

No. Light throttle. It actually has a small shutter/vibration when engine RPM's are rising through 700 RPM or dropping through 700 RPM. I can feel it in the footfeet and steering wheel and it's also audible. Cannot pinpoint it at all. Took the Map sensor out, cleaned it and reinstalled. Seemed to help for about 10 miles, but now doing it again. I will replace Map Sensor with new and see if that fixes the problem. If not, I'm going to contact H&S to see if they may have a software fix for it.

 

i would call h&s before you buy a map sensor and see what casey says.

 

I was told that this could be the crankshaft vibrating slightly under increased torque when running tunes. I am running the 120 Tune on my XRT and I only get tranny shudder in 5th and 6th gears under heavy acceleration in rpms below 1500

I am getting the XRT Pro soon with the Overdrive tunes to step the tranny uo. I hear these tunes are awesome!

 

Yes, that would make sense. However, even when the Minimaxx is programmed for NO POWER. It still does the same thing. One more thing........When I was deleting my EGR. I unplugged the MAP sensor on accident, drove it down the road about 3 blocks and noticed I didn't have any boost. Went back home and realized that I had the MAP sensor unplugged. Plugged back in and had this strange vibration ever since. YES, I've already pulled the MAP sensor and cleaned it.