Isuzu Trooper Owners Club UK™

jonkem · Posted: Fri Jun 02, 2006 23:51 Post subject:

That should have been pressure change not vacuum Embarassed

Can't imagine what a pipe would be doing on the gearbox, the plot thickens Exclamation

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1994 KZJ70 Cruiser (currently filling the garage and causing some head scratching)
1988 MKI 3.1td Hybrid Van (Ex Bobtail)
1991 SWB Fronty 2.8td Hybrid
2000 Astra Estate (work)
2006 VXR Astra
MK1 SR Nova

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Philp · Posted: Mon Jun 05, 2006 16:27 Post subject:

Been out today and the power loss has returned, was fine for a while and gradually dropped off. The engine sounds muffled again and it's lost it's "sharpness" I'm wondering if this means I have an air leak somewhere as it got better after I'd bled the filter and pump and this started after I'd serviced it. I'll start by taking the fuel filter off and reseating it, bleed again and see what happens. Does anyone know what size the rubber fuel pipe is from the tank is I noticed it is a bit crusty under there so it may have cracked although I can't see any obvious leaks but as its a bit oily underneath it's hard to tell. If I replace the fuel pipes is it just a matter of keep on bleeding it from the filter housing to get the pipe full again?
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

jonkem · Posted: Mon Jun 05, 2006 20:42 Post subject:

Yes to the bleeding after changing the pipe, doesn't take too long to get it through. Can't tell you the diameter as I haven't got a tank underneath anymore!
Mine now only has those symptoms occasionally. Feels almost like it's not coming onto boost when you think it should. Gonna check the vac pipes around the turbo just to be sure.
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1994 KZJ70 Cruiser (currently filling the garage and causing some head scratching)
1988 MKI 3.1td Hybrid Van (Ex Bobtail)
1991 SWB Fronty 2.8td Hybrid
2000 Astra Estate (work)
2006 VXR Astra
MK1 SR Nova

markymoan · Posted: Mon Jun 05, 2006 20:49 Post subject:

mmmm i dont feel a boost on my 2.8 Shocked

But i get 35 mile to £5 on average.
I would love to know how fast they are supposed to go Question

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:::Matski::: · Posted: Mon Jun 05, 2006 21:23 Post subject:

I get 35, there is definatly boost after about 2500rpm
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Front Aussie Locker - Rear LSD - Petrol Diffs
2" Lift - 1" Body lift - +2" shocks - 32" KL71s
2.5" free flow stainless system - TMIC - 20psi Boost
Suckin' Diesel Baby!

jonkem · Posted: Tue Jun 06, 2006 5:27 Post subject:

37mpg on 50% veg oil and a good run. Normally boosts at 2500 apx no rev counter. Just sometimes feels like it isn't gonna boost.
50mph in 5th gear very gutless when you try to accelerate. Another time it will fly away. Very strange Confused

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1994 KZJ70 Cruiser (currently filling the garage and causing some head scratching)
1988 MKI 3.1td Hybrid Van (Ex Bobtail)
1991 SWB Fronty 2.8td Hybrid
2000 Astra Estate (work)
2006 VXR Astra
MK1 SR Nova

:::Matski::: · Posted: Tue Jun 06, 2006 13:35 Post subject:

With mine I find that anything under 55mph is a forth gear job (most of my miles are towing though).
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Front Aussie Locker - Rear LSD - Petrol Diffs
2" Lift - 1" Body lift - +2" shocks - 32" KL71s
2.5" free flow stainless system - TMIC - 20psi Boost
Suckin' Diesel Baby!

Philp · Posted: Tue Jun 06, 2006 13:58 Post subject:

Well I've just spent the morning underneath the thing. At some point, probably when the back half of the chassis was replaced the hard fuel lines have been cut just in front of the rear wheel and replaced with rubber hose. Ive just replaced both bits of rubber fuel hose after trimming the pipe stubs back to clean metal and used all new clamps. Good job as I think the main feed (the larger top line) was leaking slightly and turned out to actually be air hose rather than fuel line and had gone rock hard at the ends.

I also pulled the filter and found two big flakes of red oxide paint in the top on top of the matrix, possibly from where I pumped some fuel out into a jerry can when I had to reseal the fuel gauge sender, the jerry can was a bit flakey inside although I thought I'd used a funnel with a filter in. I managed to pull the flakes out of the holes in one piece but will order a new filter this afternoon from milners. It wouldn't surprise me if these have been shifting around partially blocking the flow, they were best part of 10mm square each!

I've also re-bled the filter and pump so I need to go for a longish test drive to see how it holds up.

This afternoon I'm gonna nip up the handbrake adjusters and also have found the new exhaust is blowing again so will get some fire gum in the bad joints. It's going to the place that fitted the new exhaust for its MoT anyway so if it's still blowing they can sort it out and pass it.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

jjcymru · Guest

how did you get on? any joy?

wayneh · Posted: Thu Jun 08, 2006 3:36 Post subject:

i had similar problem on a 1990 2.8, i replaced the steel fuel pipe with 8mm outside diameter nylon pipe and this cured it, the original steel pipe was in a1 condition externally but when i cut it in half it was badly clogged. the nylon pipe only cost about £4 and i have just changed the pipe on my 92 trooper just in case.

Philp · Posted: Thu Jun 08, 2006 9:09 Post subject:

Still waiting on a new filter from Milners, should be here today, I think it probably didn't ship out until yesterday as I rang them quite late on in the day. Once thats here I'll change em over and go out for a run. I hope I don't need to drop the tank and get it cleaned out as that would be a big PITA.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

Philp · Posted: Fri Jun 09, 2006 13:13 Post subject:

Changed the filter yesterday and followed the wife over to drop her car in to the dealers for a service and it does seem that normal service has resumed, however, we'll see how long it stays that way. It may be that I need to flush the fuel lines and have the tank cleaned out if its crud in there.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

Philp · Posted: Sat Jun 10, 2006 8:59 Post subject:

Bum, Pooh and widdle, the damn thing has gone off again after a second drive, same as before, loss of power, I did notice a bit more smoke when I revved it. My thoughts are:

Air still getting in somewhere, got to be in tank or a bit of the fuel line I haven't changed
Fuel feed line getting clogged with muck, either in tank or further up
Fuel pump has intermittant fault
Turbo has intermittant fault (but it does feel like its boosting)
Fast warm up flap closing on it own accord either in intake ot exhaust (don't think theres one in exhaust)
New back box has loose bafle that is intermittantly blocking flow

Does anyone know whether it's safe to blow the fuel lines through with compressed air or will it damage the in tank pump?
Anyone know what a complete set of hard fuel lines costs from the dealer?
Anyone have a clean fuel tank/pump for a 2.8 diesel for sale?
Anyone have a turbo as above?

I am at the end of my thether now and I am seriosuly thinking of sticking it into a garage and letting them diagnose it.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

turboDIESELtrooper · ** Joined: 17 Feb 2006 Posts: 77 Location: United States

markymoan · Posted: Mon Jun 12, 2006 11:40 Post subject:

I dont think they do, or bleeding them would be a whole lot easier Smile

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