3 LCD Tvs installed, but need more help......Please.
 

I just installed my 2 7 inch Headrest TVs and a front sunvisor LCD 7 in. and a Pyle DVD player in my 2006 M3 hatch.

If anyone has any advise for me because I am having a problem.

When the car is not started all three monitors look great and play fine. When I start the car the 2 headrests in the back jump around and have distorted lines running through them. The front looks fine. The power wires are all connected together and the RCA wires as well. I didn't know if there was a problem with lack of volt power being they were sharing the same wire of the RCA's need a separation divice or if there needs to be a filter on the RCA just like when you have engine noise on a stereo. Before I start tearing it all appart I figured I would get some advise first.
You can email me as well if possible.

Anyone have any info for me? Thanks.