Have a rough idle? Check the EGR!

[rangerin]

Recently, I swapped in a 5 speed in my ranger and tore the engine down for a full rebuild. While the clutch and trans worked wonderfully, I had a serious vacuum leak that I couldn't pin down causing a horrible idle. Before the swap I had 18" of vacuum with a steady gauge needle. Afterwards, I could only squeeze 10" and the needle was not steady.
http://www.therangerstation.com/forums/showthread.php?t=155273

Turns out the EGR must of gotten some loose carbon during the cleaning process and got stuck open. Blocked it off and viola! Purrs like a kitten.