Engine just stopped

[Floyd]

Hi all, I'm new to this forum so hope I'm doing it right.
I have a 1998 Isuzu Wizard with the 4jx1 motor. Last week on the way to work it just stopped at about 80kph, towed it home and since then I have replace the injector wiring loom, rail preasure sensor, both oil filters, oil, fuel filter, also cleaned the fuel tank pick up, the fuel is good and clean, I removed sump cleaned and checked the oil pickups.
There seems to be plenty of preasure in the rail oil feed pipe. I purchased a Mechpro Auto Code Reader and plugged it in, at first it gave me a fault with the rail preasure senser but then I realised I hadn't plugged the sensor back up to the loom. Now the code reader won't communicate with the ECU, it comes up with communication eror, I know the reader works as I plugged it into my wifes car and it worked fine.
I am at my wits end, I am starting to think the ECU may have packed it in.
Any suggestions on what may be the problem????

[geeves]

A common failure is oil in the loom from the oil pressure sender getting into the ecu and causing it to fail. Otherwise so many things. Rob is the expert

[Floyd]

Thanks geeves, when I put the new loom on I cleaned all the plugs and connectors out with degreaser and air.