1.6 HDi - Dropped Cylinder

[addo]

In my role as "Last Chance Larry" (or possibly people just see it as that) I was called in to put the Lexia on a C4 with the DV6 engine.

The owner had already had a crack at fixing a leaky injector (#2) but clearly the car was not firing on all four. Aside from the injector possibly not being re-seated well (apparently he'd had the sleeve come out with it) is there any frequency of other issues with a leaky cylinder - does it gum up the valve margins, for example?

The owner had also been trying to identify which cylinder was faulty by popping off injector leads while it was running! :eek: Fortunately this seemed to have not done any damage as it was injecting to all bores within tolerance (at least, according to Lexia). Or will it still fire with a damaged output driver to one or more injector channels?

[Lighty]

Have had a few faulty injectors on these engines, only thought is wether he dropped something into the cylinder whilst doing the injector. Lots of carbon can fall in the cylinder & could get stuck under a valve seat.

[Jed Clampit]

As lighty just wrote if it is carbon or some thing else under the valve seat the valve clearance on that valve /cam will be bigger rocker /cam cover off job or compression test allso would it not chuff a bit if the valve is slightly open if not it back to the injector