However the blank gunk deposited creates restrictions in the inlet manifold causing hot spots and starvation to mainly number 2 and 3 cylinders. This valve recycles inert (but very dirty) exhaust gas back into the inlet manifold in an effort to reduce emissions. (Short version) There are 5 root causes for the ZD30 engine failures. NADS or Nissan Anti Detonation System is a series of simple modifications that can be done to the ZD30 engine and exhaust to avoid the well documented issues with piston and engine damage. Any advice on this thread is just that – advice. This thread is not here to debate the reliability of the engine, or compare it to the 4.2 or petrol variants, its here as an easy to follow guide for anyone interested in doing the modifications. I purchased mine from the TJM superstore in Osborne Park WA, if you follow the link there is a list of distributors on there.The Nissan Patrol 3 Litre ZD30 engine can have a few modifications to make it more reliable and avoid the dreaded ‘grenade’. Since the installation I have towed my 3 tonne boat up north in WA and I was extremely happy, so was the $1320 worth it.to me yes. I have not had to adjust mine, its factory set on 5.

There is no splicing or cutting of the wiring, it is truly a plug and play and the difference is noticeable (big time)

I ran the DP loom back out onto the drivers side, plenty of places to secure this and this way you can see the LED lights on the chip to make sure its working. I Installed the DP31, not a lot of work but for ease of installation I removed the intercooler, located the connector at the end of the common rail injection pipe (facing towards firewall), simply disconnect from here and fit the connector from the DP31 onto it (make sure it is snapped on tight) then connect the DP loom back up to original OEM connector, cable tie the wiring.

Dp chip nissan patrol