XANTIA TD POOR STARTING - PRIMING FUEL FEED...

andmcit · Unread post by **andmcit** » 25 Jan 2006, 17:36

Hi, I've had a reasonable scan through the old search option but I'm guessing the author/contributors in recent postings covering this thread will tell me faster than I'm going to find the info!!

When the pump needs priming through the manual bulb input, is the cause of the dropped pressure in the feed due to seals in the diesel pump or the secureness [or lack of it] of the feed piping etself?

Andrew

JohnT · Unread post by **JohnT** » 25 Jan 2006, 17:54

This is a common problem. If it starts OK after you have pumped the bulb so it goes hard the problem is where the return pipe rises up from the chassis area. It draws in air. If this is not the problem, check your heater plugs, then the fuel run off pipes attached to each injector, they should have a tight fit.

AndersDK · Unread post by **AndersDK** » 25 Jan 2006, 18:17

If the bulb can be pumped several times before it gets hard - the basic problem is that fuel in the feed pipe from tank is flowing back to tank. This in turn is caused by a smallish air leak somewhere in the fuel feed line.
Could be a pin hole in rigid piping, hairline cracking on rubber hoses or a regular cracking on a stud over the pipe run.
Rarely you have a regular visible fuel leak, so the problem can be a nusiance to trace down.

Unread post by **Peter.N.** » 25 Jan 2006, 18:47

I would go with Anders. Check the injector leak off pipes.

jeremy · Unread post by **jeremy** » 25 Jan 2006, 18:51

Leakoff pipes will only cause bad starting or other running problems with a Bosch injection pump. Leakoff's on Lucas/CAV/Roto-diesel - simply make a mess and smell!