2H - Engine briefly loses power every 10 seconds or so
Symptoms
- Engine very briefly loses power every few seconds
- Often happens more when there’s a heavy electrical load (eg lights, or heater fan on)
- Clicking sound can be heard from underneath dash each time power is lost
Cause
The EDIC (Electronic Diesel Injection Control) system has a fault
Resolution
This is a common problem with 2Hs. The EDIC is cycling to STOP briefly. It’s usually poor engine or body earths and it usually happens more when there's a heavier electrical load on the alternator (e.g. headlights or heater fan on).
To fix it, remake all your earth points, especially the major engine and body earth (new terminals, wire wheel on the attachment points, new cables if necessary). Pay particular attention to the earth junction under the dash on the drivers side, it has 6-8 wires attached to it, remake this one as well. This generally solves the issue.
In the meantime you can pop the EDIC rod off and it'll stop the problem, but you'll have to stall the vehicle to stop it. If this doesn't resolve it then you may have a faulty EDIC motor or Fuel Control Relay. Some people have reported success with cleaning up contacts in the EDIC Motor and others have opened up the Fuel Control Relay and resolved PCB issues. If nothing else resolves it, a simple, possibly long term solution, is to leave the EDIC rod off and to fit a "stop cable", not ideal, but it works.
A few “stop cable” images can be found here that will give you some idea how to make one: https://photos.app.goo.gl/C1cotdMzRNjLqjnm7
If you do have a Fuel Control Relay fault Ray Saggal from Hendra Motors (https://www.hendramotors.com/) sells a great aftermarket Fuel Control Relay.
On an HJ60 the Fuel Control Relay is found in the right hand side footwell - you can see a full set of images of the FCR here https://photos.app.goo.gl/Ew6QXwQeNijUkghA8
Below is a photo of the EDIC rod.. Popping this off will default the injection pump to RUN..
The EDIC rod is connected to the EDIC Motor on one end, and the Fuel Control Lever of the injection pump on the other.
More information on relevant body earth location
There is an 8 pin 250 series automotive connector under the instrument cluster, it has a small removable busbar that should be pulled out and cleaned up with circuit board cleaner, any corrosion can be removed abrasively if necessary. Spray out the plug as well. (with thanks to Brady Strickland/Horizon Early Landcruisers for these images)
