Isuzu Trooper Owners Club UK™

viegar0 · Posted: Fri Nov 21, 2014 14:03 Post subject: 1995 trooper vac removal

Hi I'm new just brought a 1995 trooper big horn import love it but I'm abit simple Very Happy

I removed the vac system thinking it was the same as a 1994 now my 4x4 doesn't work and it's down to the vsv vac system so some one please help

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Rhanagar · Posted: Fri Nov 21, 2014 15:04 Post subject:

Vacuum pump is on the back of the alternator. You want the small pipe on top that points to the engine.

_________________
1990 Isuzu Bighorn LWB Mk.I 2.8TD Manual Lotus Edition
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto Lotus Edition

Deceased
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto LS

viegar0 · Posted: Fri Nov 21, 2014 15:30 Post subject:

Yea I saw this on your other post mate very helpfull I have a question can I make it so it doesn't go to the tank and what that actuator thing on the diagram that's near the vac pump

Rhanagar · Posted: Fri Nov 21, 2014 15:46 Post subject:

You can ignore the tank, but in case of a split in the pipework it gives you a reserve of vacuum. Please please make sure you put the check valve in ... and the right way. You want this as near to the vac pump as possible and protected. This will limit the chances of a vacuum leak (which will affect your brakes).

That actuator is actually a filter/valve thingy that the QWS and EGR system comes in on I believe. You can ignore it if you wish and just tap into the check valve from the pump.
_________________
1990 Isuzu Bighorn LWB Mk.I 2.8TD Manual Lotus Edition
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto Lotus Edition

Deceased
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto LS

viegar0 · Posted: Fri Nov 21, 2014 15:48 Post subject:

Thanks man saved the day Smile

viegar0 · Posted: Fri Nov 21, 2014 17:39 Post subject:

Tryed straight to vacuum pump no tank but still no luck any ideas the light on the dash works but it's not coming on when I engage 4wd so is there any way to test 4wd without going out and getting stuck

Rhanagar · Posted: Sat Nov 22, 2014 8:56 Post subject:

Plumb the tank in. You might need that reserve of vacuum to give it some extra oomph to power the front actuator.
_________________
1990 Isuzu Bighorn LWB Mk.I 2.8TD Manual Lotus Edition
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto Lotus Edition

Deceased
1994 Isuzu Bighorn LWB Mk.II 3.1TD Auto LS

viegar0 · Posted: Sat Nov 22, 2014 11:47 Post subject:

I'll see if I can plumb it up I can find the pipe to the tank but can't find the return

viegar0 · Posted: Sat Nov 22, 2014 11:52 Post subject:

I'll see if I can plumb it up I can find the pipe to the tank but can't find the return

Gribble · Posted: Sat Nov 22, 2014 13:00 Post subject:

There isn't one - remember the vac system is sucking from the pump so the tanks just a reserve .

A simple test is to pull of the pipes on the sotf actuator and see if the sucks on the one near the diff then press fwd and see if it changes over .

If theres no suck or no change over a read of Rhanagars guide is the next step .
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2 New Troopers !

Gribble · Posted: Sat Nov 22, 2014 13:04 Post subject:

To test the 4wd jack up the n/s front wheel and see if you can turn it when 4wds in , hand brake on, engine running.If the front prop goes round then its a t/box end fault .If the prop says still its an axle fault.

Probably . Smile

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2 New Troopers !

viegar0 · Posted: Sat Nov 22, 2014 16:05 Post subject:

Fixed now guys thanks again