Hi Alan - I know this is going a bit off-topic now (I still think the apparent 'slow starting' should be investigated, if only for elimination), but - when doing the suggested injector leak off test - how do you distinguish between 'normal' versus 'excessive' leak off? Is it a simple comparison between the 4 injectors to see if one is leaking significantly more than the others? I ask just in case I need to do this one day!Dave and Faddy, my fault for not explaining what a leak off test is.
A common rail injector is supplied with more fuel than it actually injects. The excess is used to equalise pressures either side of the injector pintle and lubricate the moving mechanical parts. It's then returned to either the filter or the fuel tank, depending on the plumbing. To do a leak off test the rubber pipework is removed from the leak off port on the injector and replaced by a tube and collection bottle. There are no high pressures involved. It's one of the bog standard tests for common rail diagnostics and will show up any excess leak off, something that HDS, or any other diag tool, will not.
Alan
Thanks. Though I hope I never have to.Yes, Jon, we are in danger of straying off topic and delving deep into the subtleties of common rail systems. To answer your question the ideal is to have the manufacturers leak off figures. However, in practice, it's usually blatantly obvious that one injector is returning a lot more than the other three.
I totally agree with you about investigating the resaons for the engine turning over slowly.
Alan
At the risk of jinxing things... Glad it's fixed (again)!Glad it's fixed!