holden jackaroo (isuzu 4JX1) injector tuning

[barnsie46]

i was wondering if anyone has done any tuning on these? as the computer thats in this Holden Jackaroo is blown and i need to replace it, are they able to be just swapped or do they have security like late model commodores that stop computers being swapped?
i do know its obd2 and the
service no: 16252667 and the tune is CZTU
what would the best cord to read this tune be?

[antus]

What year is it?

[Gareth]

Don't you mean 4JX1? as in 3lt diesel, if so I've had lots to do with them.

[barnsie46]

yeah a 2000 holden jackaroo with isuzu 3.0ltr turbo diesel, the guy put a new fuel pump in it and it ran for 2 days then wouldn't start and he belives its the computer

[barnsie46]

Don't you mean 4JX1? as in 3lt diesel, if so I've had lots to do with them.

yeah 4JX1

[Gareth]

and he belives its the computer

based on what? rare but not impossible, I've only ever had to replace one ECU over the years and that was for a dead injector driver...

I'd be getting another opinion, the oil pressure switch on the rail is the most common cause of them not starting

[barnsie46]

and he belives its the computer

based on what? rare but not impossible, I've only ever had to replace one ECU over the years and that was for a dead injector driver...

I'd be getting another opinion, the oil pressure switch on the rail is the most common cause of them not starting

Thankyou ok ill have a look at that and get back to you thanks heaps for your help! is there anything else that prevents them from starting?

[barnsie46]

the oil pressure switch on the rail is the most common cause of them not starting

is this the switch you are talking about i pulled the rocker cover off and its the first switch in the middle of the injectors?

[barnsie46]

located here?

[Gareth]

Yes, you need a scan tool to read the oil pressure, the ecu won't drive the injectors until a predetermined pressure is reached. You can often see oil pissing out of them while cranking (with the rocker cover off) which confirms that the sensor is dead.