Truck seems to have a rough idle not bad I had kid in back seat and ran into store came out and he asked why my truck was shaking. Plugs been changed dunno anything else I could do.

 

Honestly you don't have an idea what else to do?
How about the check engine light?
Is there any code set?
A Scanner looking at live data might show one or both fuel tables out of limits.
Then you act on that data for repairs.
As of the moment, you have nothing to report but rough idle.
Need to see why, then do the repairs.
Good luck.

 

No lights are on just kinda noticed it so haven't had a real good chance to look things over and don't have a scanner.

 

you could check the IAC

 

What's iac?

 

idle air control valve

 

does it feel like its got a rough or low idle or does it feel like its just dying on the start

 

Idle Air Control.
it located on the rear of the upper intake, back by the firewall.

on the 4.6 and 5.4...can't speak for the 4.2 v6. Which engine and year is yours?

they can get sticky/dirty and cause a fluctuating idle...rollercoastering from 700- to maybe as high as 1800-2000ish. They can be removed and cleaned but some times cleaning may take one then one time or they just won't respond and a new one is in order. FYI cheep aftermarket one will not perform well , better off getting a motorcraft.

I found it best to remove the whole throttle body housing, reasons being, #1 that the IAC will come off with it and then it easier to remove and replace. #2 there is a couple of EGR port internal to the throttle body housing that also can get plugged and cause some erratic running issues and one can clean those out too. Not hard, figure on a 2-3 hrs

 

thanks for the detailed explanation at work so cant give amazing help