Hi!

My Nissan Serena 2.3D 1997 wont start after standing still for about 4 weeks. Its crancing just fine but not starting.
I have had some trouble starting it before, mainly after stopping it and coming back out from the shop (~30min or so.) This has happened a couple of times. I have then triend crancing it a bit, and then tried again later. Sometimes it has started after ~5 mins of standing still, and sometimes after ~30 mins.
I dont think the glowing it the problem since it has never been starting without glowing, but allways started at once after glowing, and the starting problems have been there after use, when still warm.
Im wondering if this might be a leaky pipe which lets air into the system, but i dont see why its acting so "randomly".. Now i have tried crancing it several times, but still not sign of it starting.
I have also tried start gas today, its starting with the gas but then it dies againg at once when i dont spray anymore. Could it be some clogging in the diesel system (filter, nozzles or something). Can it help to try towing it to suck the diesel though?