I posted a thread only a week or so ago asking for any possible advice on problems I had with starting and running problems with my 2001 Astra 1.7dti
As it turns out I cant pin point exactly where the problem may lie but I ended up going back to basics.
I noticedd there were 2 wires (to 2 different sensors) that were (frayed/broken) in behind the injector pump and the other leading to quite possibly the camshaft sensor. I stripped back, simmply block connected them back up and taped up. I then stripped top of engine cleaning as I went (EGR valve which was rediculously gunged up and all associated air pipes. I checked all electrical connections and notice there was one plug connecting into the injector pump that was missing the rubber seal (which also ensures a good fit) so got a erplacement and refitted. Stripped back cam cover and noticed the top of the block was gleaming. I took off and replace all washers on the leak-off pipe (as the pipe itself proved impermiable). I then gave the likes of MAF connector a good squirt with a silicone based spray and re-assembled.
Hey presto, without even re-priming the fuel lines, she fired up, not a bother, not a struggle and is back to her normal (fingers crossed) reliable self.
Thanks to all the guys who shared whatever info they had especially ROSWELL who (and although I had checked the pipes before hand really did lead me to leak off pipes as I had made sure to run the engine for a few minutes each time which then obviously brought the top of the head with a nice Alloy shine)
Many thanks guys