Isuzu Trooper Owners Club UK™

Philp · Posted: Tue Apr 25, 2006 11:03 Post subject: 2.8 power problems

Just got back from a 2k+ mile round trip to France and the Trooper is giving me some cause for concern. I seem to be losing some power at the top end, difficult to describe but it seems to get a bit "mushy" as the revs go up and doesn't seem to pull as well as it did. I did a full service before I left and I did have problems bleeding the air out of the fuel filter. Could this behaviour be down to some air getting further down the system, I did bleed it again and the injector pump whilst I was "whooshy" like fan noise. It also seems to be exceptionally frugal on diesel. It does feel like its boosting though. Any ideas what could be up, air in the injectors? Duff turbo, *beep* new exhaust pipe, closed intake/exhaust warmup flap (although that never gets used and shes's not smoking) She still cruised back at 70 loaded up, oil pressure is good as is temp, but she just don't feel right.

All answers on a postcard please, I thank you!
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

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nail it · * Joined: 27 Feb 2006 Posts: 30 Location: rotherham

hi if theres any air getting in to diesel system can corse lack of power ect check all pipes from tank also check for kinked pipes also filter fitment double check all seals av seated and filter housing for cracks if its still draws air after u have done these checks it could be a tank pickup pipe problem down to rust 8)
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siweb · ******* Joined: 18 Apr 2004 Posts: 1590

Philp · Posted: Tue Apr 25, 2006 19:31 Post subject: Re: 2.8 power problems

siweb · ******* Joined: 18 Apr 2004 Posts: 1590

jonkem · Posted: Tue Apr 25, 2006 19:49 Post subject:

I think you can crack open the bolt at the back of the pump to bleed it. It is in the centre of the 4 outlet unions and used for timing the pump.

My 2.8 is exactly as you describe after my last service. I can't diagnose it at the moment (broke the axle) but am certain it's not trapped air because I run an electric pump.

I changed oil, oil filter, fuel filter & used bucket loads of injector cleaner. I also had 2 vac pipes knocked off by my "assistant" but I'm pretty sure they went back in the right places.

I look forward to you resolving this one for me as well Smile

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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

joeswan · * Joined: 29 Jan 2004 Posts: 39 Location: Aberdeen

Had a similar experience, when also in a hurry didn't connect 2 vacuum pipe. These 2 went round to the nearside and connected above the turbo. Both were on connections on the Intercooler??? Joe
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Joe

Philp · Posted: Wed Apr 26, 2006 15:32 Post subject:

No intercooler on mine.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

jonkem · Posted: Wed Apr 26, 2006 17:18 Post subject:

Mine neither!
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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

Philp · Posted: Thu Apr 27, 2006 15:44 Post subject:

Here are some pictures. Having a poke around there seems to be a fair bit of oil underneath this vacuum operated doodad in the inlet manifold, seems to me to be oozing a little from the spindle shafts. a: what is this called and b: is this normal or a sign of something bad turbo wise as I guess this is where the oil is likely to be coming from. It could at a pinch be coming from the rocker cover but I don't think so.

view from O/S

view from N/S

Secondly, there seems to be a vacuum hose missing here, it looks like it possibly goes from the pipe stub covered by the green duck tape (applied by me to seal it) to the other circled bit at the side of the air cleaner assemby shown circled in the second pic. Can someone with a 2.8 have a look at theirs and tell me if I am missing a hose and if my guess as to it's routing is right (oh and any idea what bore size hose it is would help too.)

I'm still inclined to think air in the fuel system somewhere but if anyone can give me instructions for bleeding the pump as I can't seem to find the beeld screw and also how to bleed it at the injectors I'd be grateful.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

markymoan · Posted: Thu Apr 27, 2006 16:07 Post subject:

I'm sorry for the huge pics, but its all i have, i hope you can make the instructions out

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Philp · Posted: Thu Apr 27, 2006 18:21 Post subject:

Thanks Mark, I was right then as thats what I cracked open and bled with the pump on the filter. It was just the pictures in my handbook don't look anything like my pump!

Any chance of you having a squint at some point at the vac pipes?
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

markymoan · Posted: Thu Apr 27, 2006 18:47 Post subject:

No probs, pm me and i'll have a drive over, that way you can compare and get your club stickers Very Happy

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Philp · Posted: Thu May 25, 2006 9:35 Post subject:

Mark, I think this is a great idea, can't do this weekend as we have visitors but could do an evening, I could come over to you if thats easier. I need to try and get this lack of urge sorted as she's due for an MoT next month and I need to lug the trailer down to France in August.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

markymoan · Posted: Thu May 25, 2006 10:24 Post subject:

Anytime that suits you really, i'll pm you my home
phone number, im only 2 mins of the m62 swinton turn off Smile

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