Just bought a 2005 f150 fx4 with 57k miles. Everything runs great so far, but a couple times now at idle (600 rpm) it will go lower and sound it like it wants to die but it only last a few seconds and goes away and goes back to 600rpm. What should I look for specifically? The plugs are original, and the truck runs great except it has done this a couple times now. Just wanting to be proactive. thanks

mike

 

clean the throttle body and MAF.. change the fuel filter.. start thinking about plugs