Isuzu 3.1. turbo diesel. Engine revs drops and the engine cuts out intermittantly on tick over.

Is the fuel filter ok?

wow no year, !@
the check engine light
means!
1: get car serviced. now.
2: if DIY? scan it. your self. and see what DTC you have....

all cars made in usa, 1988 to now. (about)

clean filters done at the service points?

J= Diesel
some newer J engines are direct injected.
case in point
4JX1 is a 3.0L direct injection diesel engine, turbo, some intercooler.

Hi Shirley, please state make and model of your car as well. If it is a turbo diesel, there could be a problem with the turbo, and the engine management unit are cutting the revs to protect it. Hope this helps.

Sounds like a sensor but what one and where ? take the air intake pipes off and check for oil inj the pipes as it could be the turbo is past it and its throwing oil into the intake pipes which is stopping the sensor from working once the oil builds up ,once its left the oil drips off allowing the engine to run again

who says it over rev'd what authority,
the scan tool
the dash board.
or pistons flying out hood.

1999 Isuzu Rodeo Service Repair Workshop Manual DOWNLOAD
Greetings, I read your question and I think Reliable-Store can help you in this. Here's the site link.

Yes you can . Requires some skills but the only bits that dont work after are the speedo and the rev counter .

These can be made to work but its a bit tricky ..

Drop the gearbox down and out, take off the flywheel and you can see the seal then , prise it out ,cut off the wearing if it has one, tap on the new wear ring ,fit the new seal and replace the gearbox .

You maybe gotta jack up the back of the box to get the top bolts out , depends how handy you are .

Is this the 3.0 diesel ? Most likely the rail oil pressure sensor is faulty but wont show as a trouble code cos it reads pressures  from 0 - 27Mpa and can  show pressure  even when  its not there ,hard to spot but pull the white wire from the car side of the injector loom by the dipstick and see if that sorts it out-  or the rail oil pressure control valve - this should show as about 20% on tech 2 at idle  if it goes below 15% the engine stops again no code will set .

Yes it pays to have a Turbo timer or let it run for 3 minutes after an outing.
An Intercooler is usually fitted to turbo charged engines.It cools the air entering the engine making it denser,Thats why cars go really well on frosty mornings after they reach running temp.
Hope this helps.