[HellonWheels]

Hey guys ,just finished a head gasket change on my zook. It started fine and ran and idled nicely, then after a run down the freeway it cuts out at 1500 rpm and just wont idle. Runs smooth above that rpm . I changed the inlet and ex manifold gaskets, rocker cover gasket and timing belt.

[BrumbyBoy]

Sounds like a vacuum leak to me, id be checking all your vacuum hoses are connected and then ensure the intake manifold is sealed properly.