I am usually in the 3rd gen section so forgive me i dont know much about these 12 valves. A buddy is looking at a 98 12 valve, and the guy says the truck starts fine and runs fine when warmed up but idles rough when it is cold. Is there a simple fix for this? He just wants to know what he is getting into to fix it before negotiating.

 

Sure there is , buy a gas engine !!!!!!!!!!!! Or turn idle screw in

 

when it's cold out they run a little rough on start up, that's a 12 valve!

 

yes sir its jus the nature of the beast..when its bout 30* out and its not plugged in mine will idle around 350-400 for a couple minutes then work its way up to 750...perfectly fine for em to run rough in winter