grand cherokee ZJ oil pressure problem
 

Hi from Poland

I have just noticed that when the engine runs idle in my jeep
(2.5 turbo diesel, which you can see here: http://grandcherokeezj.blogspot.com ) the oil pressure drops to '0' - is this normal?
when I just slightly press the gas pedal it goes up to 4 were it normally
was earlier (the whole time)
It seems that this started hapening when I added that 'stop engine smoke'
gunk to the oil. do you think it is just the sensor acting funny now
or perhaps the oil pump is going? :(

Diesel?! Must be from over seas... ah yeah ok...

I would hope that its not normal. But my guess would be a faulty oil pressure switch. Its a common thing for our 4.0L motors, but don't know much of anything about the diesels. sorry :(

Yes, it's the Italian VM 2.5 litter Turbo Diesel motor.
When I was buying my Grand everyone here has their gasoline cars converted to propane because of fuel economy, however I didn't like the idea of having a 30-40 Galon tank full of volatile gas in my trunk so I went with the Diesel, and now I regret it - fuel economy is not great ...i.e.12-13L of diesel per 100km, power ....what power - yes it leaves most of the cars behind under the lights, but could use a little more power when offroad - could have had a 5.2 or 5.7L 'monster' much cheaper here + if I ripped out the petrol conversion, could also resell it at a good price.
The only problem is that it suprises me constantly with some small problems, leaks etc - I also hope that the problem is with the oil sensor- the STP stuff I added was said to seal smaller leaks - probably sealed off the opening in this unit and now it only reacts to higher pressure? I'm a little worried though as in a couple days I have to drive over 800 km with it, and I'm wondering if it will make it.

how long has it been since you changed the oil? as said before i had trouble with my 4.0 with the oil pressure and it was the pressure switch. i also noticed i went over the 3 month oil change and once i changed the oil some pressure came back.