Originally Posted by SoCalScrewCab
What kind of electrical issues was caused by not having them in?
Well I'm not sure that it is directly related to these pieces or not but I found a couple threads about it so figured I'd replace it. Apparently they help divert water a certain way asks when they are not in, water will go into the engine bay and sometimes go into spark plug #4 and#8. I also saw someone say water dripped into the fuse box or into the pcm somehow. I am not good with this stuff so I figured to replace it anyway because I still haven't found what is causing it but it was definitely water related. After I washed my truck at an automatic car wash, my truck did not have any power and would bog down at low to mid rpms severely. I still haven't figured out the exact problem. I have a thread that I started on this forum titled "truck lacks power after car wash". That will give you the full story to the best of my ability. And see everyone's thoughts. I had the truck at a mechanic shop for 2 weeks and they couldn't figure it out. It's the craziest thing...