Norwich substitute Grant Holt proved the hero of the day as he netted the winner in a hard-fought 2-1 encounter with QPR.
The Canaries dominated the opening exchanges and broke the deadlock after 15 minutes when skipper Russell Martin reacted quickest during a melee in the six-yard box.
QPR responded well and got a deserved equaliser when Luke Young netted after a Jamie Mackie drive rebounded back off the post. However, the west Londoners were to be denied a share of the spoils as Holt bundled home a cross from fellow substitute Wes Hoolahan.
In a bright start by the Canaries, the in-form Steve Morison almost netted his fourth goal in as many games but, having wriggled past Anton Ferdinand, he was thwarted by a low save by Radek Cerny.
Wales international Andrew Crofts was the next to test the Hoops' backline, twice seeing shots deflect behind for corners.
The latter set-piece from Andrew Surman landed dangerously in the six-yard box and, after Ferdinand had failed to clear, Martin reacted quickly to tuck home the opener.
Shaun Wright-Phillips almost netted four minutes into the second half after a mix-up in the box between Norwich goalkeeper John Ruddy and Leon Barnett.
Rs boss Neil Warnock replaced Clint Hill with Jay Bothroyd in the 57th minute as they searched for a leveller, and the alteration paid dividends within two minutes as a speculative Jamie Mackie drive came back off the post into the path of Young, who slotted home from a tight angle.
Lambert brought on Hoolahan and Holt in attempt to change the path of the game and got the desired result in the 73rd minute.
After Holt saw a header blocked on the line by Young, the striker was not to be denied moments later as he directed home Hoolahan's cross.