are you talking about a CAM sensor???

Probably the CPS. There is really nothing to installing the chip.

Cam position sensor is what i think it might be. How much does it cost?

They are around 25 bucks

Does anyone Else have some DIY mods or commoN problems?

You can read online about it, but its called the 10k mod. The people at my work do it to there trucks that they pull trailers with daily and it gave them 40 more hp and a little better fuel economy, i am going to do it in my truck to, you can feel the difference