Isuzu Trooper Owners Club UK™

knockknock · * Joined: 08 Mar 2008 Posts: 39 Location: poole

1989 bighorn 2.8di turbo intercooler.
i did a fuel filter change a couple of weeks ago. trouble ever since.
now when i get to 2500-3000 rpm mark it starts to really struggle and does not want to go higher and if i put the clutch down it stalls!
there is a bleed screw on the top of the filter housing which i have tried a few times, but only once did it make any difference-i took it for about a 5 mile drive---back roads and carriage ways and it was really lively and responsive.
next day the troubles are back.
am i right in thinking that this points to air in the fuel line somewhere between the filter and the injectors.
i`m new to diesel engines and have never even seen an injector.
i dont mind getting my hands dirty and having a go but i dont know where to start.
can anyone give me any advice please. or their own thoughts on the problem.
thanks

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markymoan · Posted: Sat Mar 08, 2008 15:54 Post subject:

I would recheck the filter is seated properly, and not drawing air in.
I have never had to bleed mine after a filter change but if you wish to there is a bleed screw on top of the injector pump.

Did you fill the new filter with fuel before fitting?
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knockknock · * Joined: 08 Mar 2008 Posts: 39 Location: poole

no i did`nt fill it with fuel..i just kept pumping the plunger untill it came out of the bleed screw on top of the filter!

knockknock · * Joined: 08 Mar 2008 Posts: 39 Location: poole

when you say "the top of the injector pump" do you mean on top of the filter housing? or is there somewhere else i should be looking? where is the injector pump?

markymoan · Posted: Sat Mar 08, 2008 16:41 Post subject:

Hand on, i'll dig a pic out Smile

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markymoan · Posted: Sat Mar 08, 2008 16:56 Post subject:

Click for full size image
I hope it helps

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knockknock · * Joined: 08 Mar 2008 Posts: 39 Location: poole

thankyou,i`ll go and investigate......and pack that bloody smoking in or it`ll pack you in nag nag nag!!!

markymoan · Posted: Sat Mar 08, 2008 17:05 Post subject:

OK Dad

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knockknock · * Joined: 08 Mar 2008 Posts: 39 Location: poole

well, i dont know if i did it right or not.this is what i did.

engine not running.
loosen the 17mm bolt.
plunge the plunger 4-5 times.(fuel all over drive)
do up bolt.

took it for a spin and it seemed great untill i got to 3000 revs in 3rd then it went flat again and then stalled at the roundabout!

what do you think, scrap it! Shocked

markymoan · Posted: Sat Mar 08, 2008 17:51 Post subject:

Another common problem is the o ring in the hand primer can fail and let air be pulled in, seeing that the problem only started after you changed the filter theres a good chance the problem is around there.
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knockknock · * Joined: 08 Mar 2008 Posts: 39 Location: poole

ok, i`ve ran out of time today so that will be my next job on a dry day. i think your probably right because if everything was air tight any air would of gone through with the fuel quite soon after the initial start up after changing the filter.

thanks for your time and effort.

keep an eye out for me in the near future cos i may need more pics from your repair book!!!! Very Happy

markymoan · Posted: Sat Mar 08, 2008 18:55 Post subject:

Never a problem
btw, Welcome to the club Very Happy

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knockknock · * Joined: 08 Mar 2008 Posts: 39 Location: poole

engine is running great now,faultless.better than it ever has in the 2 years i`ve owned it.
it revs quick and high and pulls stronger through all gears.
i bypassed the standard filter with an in-line one from halfords.
so simple and cheap yet so effective.
it seems i must of always had a tiny air leak somewhere on the filter housing/plunger and by renewing the filter recently i actually made it worse.
happy now Very Happy

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1989 2.8di turbo inter-cooler bighorn

markymoan · Posted: Sun Mar 09, 2008 12:51 Post subject:

I would get a proper filter when you get a chance, it serves as a water trap as well as lasting about 20 times longer than an inline one Smile

Nice to see a happy ending Very Happy

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knockknock · * Joined: 08 Mar 2008 Posts: 39 Location: poole

will do thanks
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1989 2.8di turbo inter-cooler bighorn