Isuzu trooper diagnostics

selfdiy

Hi All,
Is there some where the Tech2 hardware can be hired out out to check the diagnostic codes on an Isuzu Trooper. Or is there someone who does a call out service to perform the different diagnostic checks?

Slidey

Most decent indie mechanics should have diagnostics for different vehicles.

The diagnostics on these Troopers is particularly poor and often will not display a fault even when it won't start.

What is wrong that you want to run diagnostics on it?

selfdiy

Well the basic problem is it wont start.

But I believe Isuzu use a specific tool called tech 2, which is able to perform a click test on the injectors, and also read the pressure in the high pressure oil rail which fires the injectors.

I know the basic tools can read fault codes, but I was hoping to find someone who has the specific software for Isuzu.

Slidey

The tech2 cannot check the injectors unless it is running.

Most common fault for non starting is the oil pressure sensor on the rail which is under the rocker cover.

dontclickonthis

Hi,

Were having the same problem today Trooper wont start.

No Isuzu garage open only monstervin which is to far.

Anyone know anywhere around Leitrim that has the Tech2??

Also if it was the oil pressure sensor that's at fault are they hard to replace?

Slidey

Handy enough to replace.

You can either take the rail out or modify a 14 spanner and use that.

dontclickonthis

Slidey wrote: »

Handy enough to replace.

You can either take the rail out or modify a 14 spanner and use that.

Thanks, would say that it more then likely could be the sensor?

Its a 05 trooper with a 120k never really gave any problems before the glow plugs and timing chain have just been done on it and of course the whole lot had to be striped down because the plugs snapped trying to take them out.

Slidey

Rail Oil pressure sensor would be a common enough fault. You sure enough that it is not bad diesel from the cold weather?

If it was badly jumped it may have also done in the crank sensor. You *should* see the RPM clock rise to about 200 when turning over with the starter if that is ok

mikemac

I know our Isuzu is serviced in Monasterevin, it's a pity it's too far for you.
It's the only place I know of

Slidey

I work in an Isuzu agents but we are closed until Jan 4th.

Sherlock in Gurteen (Sligo) might have Tech2, I think Harris gave him the agency for a while

Some Opel agents might be able to read it either or anyone with a decent OBD set up though a lot of them time there is no fault stored, you need to work it out by looking at the real time data

dontclickonthis

feelingstressed wrote: »

I know our Isuzu is serviced in Monasterevin, it's a pity it's too far for you.
It's the only place I know of

We bought the Jeep there so we rather it went back there to be honest.

dontclickonthis

Slidey wrote: »

I work in an Isuzu agents but we are closed until Jan 4th.

Sherlock in Gurteen (Sligo) might have Tech2, I think Harris gave him the agency for a while

Some Opel agents might be able to read it either or anyone with a decent OBD set up though a lot of them time there is no fault stored, you need to work it out by looking at the real time data

I rang Colm Burns Commercials in sligo there not open i will try sherlocks so, I rang Harris to nobody's open but sure their entilted to Christmas off.

Any chance you ever hear of the "white wire trick" just reading on other forums that you could snip this so called white wire and its meant to rule of the oil pressure sensor. Could be worth a try

Slidey

dontclickonthis wrote: »

I rang Colm Burns Commercials in sligo there not open i will try sherlocks so, I rang Harris to nobody's open but sure their entilted to Christmas off.

Any chance you ever hear of the "white wire trick" just reading on other forums that you could snip this so called white wire and its meant to rule of the oil pressure sensor. Could be worth a try

Never heard that but if it loses signal from the oil pressure sensor if opens the relief valve fully on the high pressure pump so it defo won't start then.

If you do get someone to read it for you it needs about 4.0kpa (I think that is the unit of pressure used, it isn't bar anyway) to start. If it is reading anything above 0.5 without the key being turned the sensor is faulty

dontclickonthis

Slidey wrote: »

Never heard that but if it loses signal from the oil pressure sensor if opens the relief valve fully on the high pressure pump so it defo won't start then.

If you do get someone to read it for you it needs about 4.0kpa (I think that is the unit of pressure used, it isn't bar anyway) to start. If it is reading anything above 0.5 without the key being turned the sensor is faulty

Thanks for the info, its proven hard just to find sum one with the Tech2 at the mo.

Just out interest i have the link to the forum where they keep raving about this white wire trick also they mention to put in two extra litters of oil so if its the pickup in the sump that's not doing what isn't meant to do then two extra litters of oil will cure it and show its at fault.

http://www.itocuk.co.uk/forums/viewtopic.php?t=17680&sid=74b084d7c1fb9a6ff2241252044a6b3a

Main reason we want to try fault find ourselves is because when we got the glow plugs done the head had to come off the whole lot cost over 1300 euro can't afford any more problems :-(

Slidey

It was an issue at one stage where one of the oil pick-up pipes in the sump used to crack where the bracket was braised on and the odd time they used to fall off. I haven't seen it happen in a long time and with your one being an 05 the modified pipe should have been fitted from factory.

I hadn't ever heard about that white wire trick.. maybe it does work

dontclickonthis

Slidey wrote: »

It was an issue at one stage where one of the oil pick-up pipes in the sump used to crack where the bracket was braised on and the odd time they used to fall off. I haven't seen it happen in a long time and with your one being an 05 the modified pipe should have been fitted from factory.

I hadn't ever heard about that white wire trick.. maybe it does work

Thanks again for your help. Will try again tomorrow

dontclickonthis

Directly behind the dipstick is a loom of wires and they are joined up, on the left side there is purple wires and the right side there is red wires. On the left side of the connection block you have purple wires I believe going to the injectors and on the right hand side of the connection is mostly red wires except there is a yellow wire and a yellow/red wire. I think the solid yellow wire is the signal coming from the "rail oil pressure sensor"

I snipped the yellow wire!! and guess what the jeep started!! When I joined the wires back up the jeep wont start, so were going to chance getting a "rail oil pressure sensor"

Are could it just be a fluke?

garbarrage

dontclickonthis wrote: »

Directly behind the dipstick is a loom of wires and they are joined up, on the left side there is purple wires and the right side there is red wires. On the left side of the connection block you have purple wires I believe going to the injectors and on the right hand side of the connection is mostly red wires except there is a yellow wire and a yellow/red wire. I think the solid yellow wire is the signal coming from the "rail oil pressure sensor"

I snipped the yellow wire!! and guess what the jeep started!! When I joined the wires back up the jeep wont start, so were going to chance getting a "rail oil pressure sensor"

Are could it just be a fluke?

Just out of interest, did you ever find anyone near Sligo that has a TECH2? Have a Saab 9-5 and not yet needed TECH2 work done, but as Isuzu and Saab are (or were in my case) owned by GM you could try McCormack's Opel on the old Dublin Road. They should have a TECH2 whether or not they will have the software for anything other than an Opel is a different story?