rough idle at start-up help!

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Joined
Jan 28, 2013
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Location
new orleans
i have a '98 land cruiser with 209k miles, never missed a major or minor service, replaced various parts that started to break down around 170k miles - master brake booster, other - ome lift..truck in great shape mechanically. still looks decent also with zero rust.

recently it has developed a rough idle/hesitation that persists for the first 15 minutes or so until the engine warms. i notice it at stoplights, etc and it is worse with the truck in gear than out of gear. perhaps this is because the engine revs higher at start-up in N or P. Also it is not a winter thing as I live in New Orleans and morning temps here range from 40 to 60 and the rough idle happens every morning. in response i very recently had new plugs installed, a fuel induction service and a new fuel filter. the problem persists. any other ideas? Thank you!
 
I had same issue recently and my PVC valve was plugged and the throttle body vacuum hose attached to it was caving in on itself. Replaced PVC valve and fixed an exhaust leak and all is well.
 

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