mk3 2l 16v lumpy tick over

[the gimp]

All the fault codes have been cleared although the knock sensor 2 fault ocationaly reoccurs.

I've replaced the plugs dizzy cap and rotor arm and it runs smooth through the rest of the rev range.

[Rmachines]

A Blocked injector mabey?  Try a shot of redex, sometimes helps.

[Len]

Mine is lumpy too. But its putting out loads of power so not gonna worry about it! 

[the gimp]

have aplied redex to a full tank will let you all know

[cs98sss4]

could it be the ISV blocked up with crud?

[the gimp]

isv is that the tubular device on the top of the front of the engine underneath the inlet manifold with the sliding part in it ?

[cs98sss4]

I think so it has a plastic pipe from the airbox leading into it on one side. It should be under the plastic cover.

[the gimp]

I think so it has a plastic pipe from the airbox leading into it on one side. It should be under the plastic cover.

I cleaned that out and tested it and it apears ok, the redex apears to be starting to work, the tickover is getting less lumpy

[Overseer]

how about turning the air-con off? often that smoothes mine out a treat..