idle stumble

[NSANE]

Mine only has 4,700 miles on it and 6 months old?

[cmd]

the idle has a stumble to it, it does not go near stalling. It is however driving me nuts. I have not had time to further investigate, i have been told to look at the egr? where is this located on the motor, could not see it, another was the fuel pressure regulator, If i disconect the vac line to the regulator the truck seems to run better?

[cmd]

no luck yet, changed please HELP! wires and plugs ok. is it possible that the MAP sensor could cause this? Dealer is clueless

[HUMTECH]

This may sound dumb but check the oil filter to see if it has an anti drain back valve(it should have A rubber seal inside the filter visible if you remove the filter, below the seal) seen strange issues solved with A proper filter installed. Even if it's the factory filter, some didn't have them. Probably won't solve anything but i'm really reaching here. I'll put some more thought to it.

[JamesT]

I had SAME issue. Nobody could figure it out. Turned out to be plugs. Buy NEW OEM plugs and wire and you'll be good.

[cmd]

Thanks guys, as far as the oil filter, this drain back valve? what is its purpose.
The plugs? is there any way of checking these, i could easily change them out, i did however have them out to check them and they were clean and the gap was good.

Tahnks again guys