Rough idle under 1000rpm

[murdered05X]

Well I have a 2005 4.6 with 80k miles on it and here the past week I've notice that it has developed a rough idle andrhe car shakes a little. When idling under 1000 rpm it can drop down to 500 at times. Soooo what do you think could be wrong lol

 

[shooterdude199]

dude i have the same fear. mine idles at 500 and it dips below and vibrates...almost stalling out. i do need to mention though that i have a 4.0.

 

[zerodevil]

check your ignition coils. Mine has a slightly rough idle at around 1000 rpm

 

[MillerTimeX17]

Check for any vacuum leaks, pcv valve, plugs, clean MAF and o2 sensors. If you havent changed your fuel filter check that too...

and coils as zerodevil stated previously

 

[murdered05X]

thanks guys .i know yersterday i called for and they said that they would charge 90 for a dyagnostic test. so i went to advance auto. the hooked it up and said it was a bad egr flow and miss fire in the #8 cylinder. who knows but i got to get it fixed. my service engine soon light is seriously flashing its ass off and ford said to not drive it

 

[xTOM153x]

The same exact thing happened to me I was getting a misfire on cylinder 1 and 5 on my V6 turned out to be the wires the ends were completely disentegrated. I changed the Plugs and Wires and the engine has come alive no more shakes and throttle response is dead on the truck feels like its brand new again.