Isuzu Trooper Owners Club UK™

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Dadzinsky · * Joined: 04 Jan 2009 Posts: 10 Location: Grimsby

Will do mate, thanks for all your help.

Dadzinsky · * Joined: 04 Jan 2009 Posts: 10 Location: Grimsby

Morning TopVaux, had the oil and filters changed yesterday for 5w 30, but doesn't seem to have made any difference this morning, is it looking like I need this one way valve?? Thanks

Topvaux · Posted: Thu Feb 19, 2009 11:29 Post subject:

Maybe.

How long does it actually take to start from cold? Time it off your watch. That'll give us an idea as to the extent of the problem.

Dadzinsky · * Joined: 04 Jan 2009 Posts: 10 Location: Grimsby

I would say between 5 and 10 seconds, everyone who hears it comments that it takes ages and ages

Topvaux · Posted: Thu Feb 19, 2009 11:43 Post subject:

OK - the reason I ask is that I always used to think mine took that long too, but when I actually timed it with a watch it was actually only 2-3 seconds! Because they do need to build up such a high pressure to operate the injectors it does take quite a while - particularly in the opinion of passing waggleheads!

Dadzinsky · * Joined: 04 Jan 2009 Posts: 10 Location: Grimsby

No, just been back out and actually timed it, and took 7 secs

Topvaux · Posted: Thu Feb 19, 2009 11:50 Post subject:

7 seconds isn't good. Was that 1st start of the day or has it run already?

Have you tried clamping off the fuel pipe as suggested above?

Dadzinsky · * Joined: 04 Jan 2009 Posts: 10 Location: Grimsby

No, I drive to work, a 40 minute 60mph drive, has then been stood since 7.30., No I havent tried clamping yet, do you know where the pipe is that I clamp?, whats the best thing to clamp it with..... sorry if I sound a bit thick.

Topvaux · Posted: Thu Feb 19, 2009 12:26 Post subject:

Don't worry - you sound a lot brighter than me! hilarious

Three hours after a full temp run and 7 seconds to start definitely isn't good. (The waggleheads are right this time!)

OK - on the nearside of the engine and just behind the engine management computer (the upright aluminium finned thingy) you'll find the fuel filter (screw canister like an oil filter) with a hand priming pump on top. Down the engine side of it there are two rubber pipes and the one that's to the front is (counter-intuitively) the feed from the tank. You might want to remove the heat shield that surrounds it to get better access (2 bolts, 10mm socket with a 4" extension). You can get a hose clamp but maybe you could lay your hands on, say, a little Mole-type wrench? The idea is to clamp it off immediately you stop and unclamp it just before restarting.

Have you tried the white (yellow!?) wire trick yet?

Dadzinsky · * Joined: 04 Jan 2009 Posts: 10 Location: Grimsby

No not yet, I get a bit nervous with things like that, in case I do something wrong, but will give both a go, over the weekend.

Gribble · Posted: Thu Feb 19, 2009 12:35 Post subject:

I thought it was the the return to tank at the back of the head that wants clamping to see if the fuels running back ?

Topvaux · Posted: Thu Feb 19, 2009 12:48 Post subject:

Gribble · Posted: Thu Feb 19, 2009 13:37 Post subject:

Ah , can be both - the fuel goes throught the head and back to tank down the return pipe constantly when the engine is running but ! it can siphon the injector fuel gallery through the return pipe since the head is above the tank .Isuzu put a small one way valve here to stop this .
Easy test - take off the pipe from the tank to the primer pump put your finger on it and pump,if you get suction and it holds it then that bits ok . if it wont hold suction the primer pump is duff and it needs a new one .Also cut off the first 12mm of hose as that can split.

At the back of the head under the inlet manifold and up above the small oil filter is a small black rubber pipe held on with a thumb clip - clamp this one after stopping thus keeping fuel in the head round the injectors and see how you go.

Dadzinsky · * Joined: 04 Jan 2009 Posts: 10 Location: Grimsby

Thanks for that, I'll try it over the weekend.