Isuzu Trooper Owners Club UK™

[rekab69]

Hi All,

Finally bit the bullet and got my pals trooper hooked up to a tach 2, the chap carrying out the work said "he had cleared all the codes / reset the codes" for the replacement rail pressure control valve we'd recently installed...

It started up and ran for 5 seconds.

He had problems with his tach 2 blacking out due to a short to earth on the wiring loom from the injectors..

He thinks that the loom may have a chaff in it and is shorting out..

The jack plug had a small amount of oil in it could this short across the pins and give the same result...?

Or any suggestions as to where to look for the chaffing...?

And... he mentioned that there is another jack plug futher down the loom could this be full of oil too?

Many thanks

Dave..

[Google]

[Gribble]

When you say jack plug do you mean the one by the dipsick ? Rallymarshal rekons to clean his out (connector   ) with WD40 and it makes for better starting ,not heard of it shorting out tech II though cos it only reads wot the ECU has logged and gets its feed from there too.
Would suggest he runs the  injector click test  on tech II and see if that shows a dodgey injector circuit ,wiggle the injector loom whist doing it too .
Eithan did post that an earthing injector wire will stop the engine but that would show on the tech II as DTC PO201 -204 .

So is the car dead ,dying or waiting for parts or Eithan ?

[eithan h]

oil in the plug doesn't generally stop the engine, how far has the oil gone as it has been known to end up in the ecu.

as gribble says do the click test on the injectors and that will check out the wiring from the ecu to the injectors if they all click 5 times then it's ok.

other than that are you able to post up some info from the tech2 if i tell you what to watch?

[Gribble]

Just a thought here , it was a good Isuzu dealer with a proper Tech II  that did this for you ?   Would have thought some prices and options should have followed the diag work.
Its just that ole celticwitch had got a similar problem and his 'garage' told him he had hydraulic valve lifters which ethian refered to as  # ! load of.
So there are good and bad in Isuzu garages up and down the land .

[rekab69]

Hi Guys,

Thanks for your replies, can you advise us on how to carry out the click test on the injectors?

It is still a non starter.

Will post the codes that the tech 2 results soon as I can..

Many thanks

Dave..

[Gribble]

On tech II go to year ,model  then  powertrain (4jx engine ) then go to miscellaneous tests (engine off,ignition on) and select injector test and go thru injectors 1 -4 . Tech II will test fire each injector solenoid that is selected usually loud enough to hear through the noise cover on the cam cover which shows the circuit is working. 5 clicks each one Eithan says and I would go with that cos he does a few !

I would think Eithan wants you to show him the figures  and readings from the Data Display screen on the Tech II when cranking the engine as
present/not present codes do not give the full picture with a non starter.

Am going stuck rail pressure control valve  on this one giving max of 2mpa so injectors disabled .Brave or wot  

I am curious as to why somebody with Tech II wants you to find out how to use it  

Lots of Tech II tonight Chris B   Flower Man will be on to you  no doubt.

Shouda taken the  money toombs .

[rekab69]

Hi All,

Been away for a couple of weeks, my pal is still nowhere nearer to getting his Trooper running...

Info from the Tech2 chap, Isuzu  / Landrover main agent, said he knew how to use it as we did ask before hand...

Codes in system.

Eng

PO201-inj no 1 control circuit
PO202-inj no 2   "           "
PO203-inj no 3   "           "
PO204-inj no 4   "           "
PO193- rail pressure sensor circuit high

Input
PO198- rail oil temp sensor high input

Immobiliser

B0017-no engine number received (4)
B0025-wrong engine number request received (0)
B0015-vehicle speed signal voltage low (2)

All codes cleared

Returned codes

As above for injectors...

It started up for 5x seconds then his Tech2 went on the blink...???

All of the above is on a hand written note..

Over the last couple of weeks it has started and ran for a while then just cuts out and won't start.

It has had a 2nd hand pressure control valve installed, when we installed this is started straight away and ran fine.

Should we check the voltage to the control valve coil...?

I do mean the "jack plug" by the dip stick, have cleaned it no joy...

Tried the extra 2lts of oil too.

White wire.

Banging head against wall, felt good for a while..!!

Any thoughts greatfully appreciated.

Cheers

Dave

[rekab69]

Hi All,

Been away for a couple of weeks, my pal is still nowhere nearer to getting his Trooper running...

Info from the Tech2 chap, Isuzu  / Landrover main agent, said he knew how to use it as we did ask before hand...

Codes in system.

Eng

PO201-inj no 1 control circuit
PO202-inj no 2   "           "
PO203-inj no 3   "           "
PO204-inj no 4   "           "
PO193- rail pressure sensor circuit high

Input
PO198- rail oil temp sensor high input

Immobiliser

B0017-no engine number received (4)
B0025-wrong engine number request received (0)
B0015-vehicle speed signal voltage low (2)

All codes cleared

Returned codes

As above for injectors...

It started up for 5x seconds then his Tech2 went on the blink...???

All of the above is on a hand written note..

Over the last couple of weeks it has started and ran for a while then just cuts out and won't start.

It has had a 2nd hand pressure control valve installed, when we installed this is started straight away and ran fine.

Should we check the voltage to the control valve coil...?

I do mean the "jack plug" by the dip stick, have cleaned it no joy...

Tried the extra 2lts of oil too.

White wire.

Banging head against wall, felt good for a while..!!

Any thoughts greatfully appreciated.

Cheers

Dave

[eithan h]

really the need the data as gribble said, the injector codes and the temp and rail pressure codes could be to do with the plug by the dipstick as they all run through this but with out the data to look at it doesn't really show a lot other than you have problems with the injectors and 2 sensors

[Gribble]

So whats the state of play now ? has the dealer given up or wating for you to say what you want done ?
Is it possible for you to get him to show you the Data Display screen on tech II befor starting and during the 5 second run ?
There are two figures on there -  Actual rail oil pressure and Desired rail oil pressure both of which you can see in 'live time'
Its possible that pressure comes up ,you start, pressure goes too high or drops off ,you stop .
Also you can see the % of oil pressure delivered again another clue.
Eithan needs these to get you going I rekon .

[rekab69]

Hi Guys,


We only gave it to the dealer to hook up the tech2 so they could tell us the fault so we could sort it out for our selves, so far seems to have been a waste of time and £'s

We found some time today to have a play.

We turned it over and over for ages and it fired a couple of times eventually, nearly ran...?! loads of white smoke out of the exhaust.

My pal is old skool so we gave a little squirt of easy start Ahhhh! yes I know but we felt it needed a helping hand, again it so nearly started...

Pumping like mad on the diesel hand pump, not sure if this helped but it made me feel needed....haha.

Just re read your replies and it looks like we need to go back to the dealer and look over his shoulder whilst it's hooked up..!!

Just going back to the begining, it was bought as a non runner, after excellent advice from the forum, we replaced the pressure valve control valve as the existing one was stuck. We have since removed it again to double check all seems fine..

when first replaced it started and ran fine, it has just slowly gotten worse and worse... back to being a non runner

cheers

Dave..

[eithan h]

as you have pulled the white wire and it still doesnt start that means there is no oil pressure there presuming the crank signal is ok.
this means either that control valve is duff or the high pressure pump has gone or it's not getting any oil from the low pressure pump, what you could try is backing off the big 30mm nut going in to the high pressure pump on an upside down L shaped pipe crank it over and oil should come out (when it's running it comes out at about 40psi) if it does then you have oil to the high pressure pump, so then it's pump or valve.

[rekab69]

Hi All,

My Pal spoke to the old owner today and found out that his garage (main agent) has narrowed it down to an oil pump, they changed one and (£1200.00 bill!!!) it still didn't run and they wanted another £1200 to fit the other oil pump!!

He had them remove the first pump and re install the original (£400.00) and then took it away from them.

Eithan.

We cracked the 30mm nut and cranked it over nice flow of oil, so does this mean the (low pressure?) oil pump is working and we need to change the high pressure one...? is this the pump that the control valve screws into?

Hope so because we have a 2nd hand one which came free with the control valve. hahaha.


Cheers

DAve..

[eithan h]

yes it is dave sounds like pump or control valve