Isuzu Trooper Owners Club UK™

JP

ok, so i replaced the glow plugs 8 months ago but i still have to pime the plugs 3-4 times before i get it to start easily regardless of outside temp. somedays there is no smoke, others its rough to start, idle is lumpy, and i get lots of white smoke. what else could be causing this?

-alternator is bust/dying?
-could i earth the plugs directly to the battery as well as the block?
-oil in the intercooler/intake?
-old/dying batteries?

i have also just had a service and re-tune(tappets, lube, timing), as well as replacing the starter motor

Thanks in advance for your opinions
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93 3.1 LWB Auto

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brains · ****** Joined: 18 Aug 2006 Posts: 897

dont hold me to this but i think i know the answer to your problem ,ithink you have a air leak in the fuel system.

JP · Posted: Mon Oct 01, 2007 4:00 Post subject:

Thanks, I'll check it out tonight. Anywhere in particular this occurs?
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93 3.1 LWB Auto

lotustower · Posted: Mon Oct 01, 2007 7:44 Post subject:

Probably not electrics if she's cranking OK. Pumping air instead of diesel sound highly likely, does she get worse the longer she's sat and is she running smoothly all the time, if not then definitely look for an air leak.
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LotusTower - '93 Lotus Bighorn

Hard1 · Posted: Mon Oct 01, 2007 13:38 Post subject:

The usual suspect for air in the fuel in a 3.1 are the metal pipes and rubber connections right on top of the fuel tank. The pipes can rot badly in this area and unfortunately may mean a new tank, but these are not expensive as you might think. It's an area which quietly corrodes out of sight - out of mind. To rule this out or confirm a problem you'll need to introduce a completely different supply such as from a fuel can with a tube immersed in the diesel to the pump thus by-passing the tank altogther. If it starts and runs OK from cold then you have identified the problem. You don't have to make an airtight delivery system, just make sure the tube is fully immersed in the diesel.

Another way is to replace a section of fuel line running to the pump with clear tube and you'll see the air bubbles quite clearly (if that is indeed the problem).
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1999 Cougar with a NICE motor..

Click HERE to see under my bonnet!

Hard1 · Posted: Mon Oct 01, 2007 15:28 Post subject:

This is the fuel take-off pipe here. You can only see it on mine because a) It's an early Bighorn without inner wheelarches (they came in '94 I believe) and b) I've had a suspension lift.. On a "normal" Trooper you wouldn't see them like this but you may if you jacked up the offside rear, let the wheel droop and removed the inner lining if there was one fitted. It looks OK on mine, and I think that's because it's done relativey few miles here in the UK (approx 20,000) and I do think the lack of inner arches stops this area being a hidden rust trap. Take a good look at the "rusty" bits though. Next week this will be treated with FE-123 Rust Converter, Dinitrol 3125 Cavity Wax and Dinitrol 4941 Underbody Wax.....

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1999 Cougar with a NICE motor..

Click HERE to see under my bonnet!

brains · ****** Joined: 18 Aug 2006 Posts: 897

another place is the banjo fitting at the fuel pump is prone to cracking on the 3.1 .

JP · Posted: Mon Oct 01, 2007 21:20 Post subject:

Thanks for the replies guys. She is definitely hard to start if she's been sitting for a couple of days but she runs fine once warm. Not sure about the electronics as sometimes she turns over quite easily but other times she needs to be cranked for 5-8 seconds and runs very lumpy(until she warms up a little and includes a lot of white smoke). I'll have another look into the air leak asap. Thanks again.
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93 3.1 LWB Auto

fee4x4 · Newbie Joined: 06 Nov 2007 Posts: 9 Location: southampon

Dont supose you are using any water???? Head gasket leaking into cylinders????

dxmedia · Posted: Wed Nov 21, 2007 23:20 Post subject:

Hard1 · Posted: Thu Nov 22, 2007 23:19 Post subject:

[quote="dxmedia"]

dxmedia · Posted: Thu Nov 22, 2007 23:23 Post subject:

[quote="Hard1"]