Isuzu Trooper Owners Club UK™

Copperbottom · ** Joined: 08 Nov 2006 Posts: 61 Location: East Sussex

1999 Astra 1700td GM low blow engine,came in as having a fuel pump problem,changed the pump for a good unit with the same part number,can get it to start and will drive well when running but as soon as it's turned off for even a minute it's a pig to restart showing signs of no fuel or fuel drain back! The usual things have been checked;fittings,filter housing,leak- off pipes etc. I've even changed the crank sensor on the offchance.
Any ideas??

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greasemonkey · Posted: Sun Feb 01, 2009 12:12 Post subject:

Try fitting a non return valve where the fuel line goes into the pump
cheers
Steve
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Isuzu Vehicross 3.2 V6 The Silver Bullet

Copperbottom · ** Joined: 08 Nov 2006 Posts: 61 Location: East Sussex

Gribble · Posted: Sun Feb 01, 2009 19:15 Post subject:

Does the leak off line go into the fuel supply line or the top of the injector pump ?

Copperbottom · ** Joined: 08 Nov 2006 Posts: 61 Location: East Sussex

It goes into the fuel return banjo on the pump. It's got the Bosch VP30 (I think) pump.

Gribble · Posted: Sun Feb 01, 2009 22:14 Post subject:

Oh - Thats one thing that it might have been out the window then ,ok get a can or a jug with fuel in up on the top of the engine somewhere then a pipe into the pump inlet and start it up then stop for a while and see if its better or worse.
Have had a few like this where the non return valve on the lift pump (internal) was faulty letting go the fuel and would not prime up again .By doing the can thing you are putting a positive fuel pressure on the lift pump thus eliminating the valve.

LandUzu · Posted: Wed Jun 03, 2009 16:42 Post subject:

the injection pump isnt leaking derv from where it is joined to the injector manifold is it? it was on my vehicle and required a reseal!!