3b diesel relay clicking randomly

[cruizerbuddy]

Hey everybody, i was wondering if someone could help me further my attempt at solving my BJ60 engine issue. Just starting hiccuping once in awhile while driving? Then i started noticing this strange clicking noise coming from the fuel relay (passenger seat floor panel) that in part controls the EDIC... The motor is a 12V 3b, truck is a '85 BJ60. Motor starts fine, no smoke. Heavy on the wilson switch but she fires right up after a couple of revolutions. Anyway, if i start it and disconnect the plug at the relay, it solves the problem, and the truck runs as expected. obviously i then am unable to turn the rig back off without first re connecting the relay.
Something is inadvertently triggering the EDIC to either bump into the overinjection position or into the fuel cutoff location just for a second and then the motor is back. I swapped the relay from a donor truck and it's still doing the same thing.
My question is does anyone have any experience on where the 8 wires from the relay go to? The plug obviously ties into the edic, but i'm just not sure how i'm triggering the EDIC randomly? but it doesn't seem to be caused "by" the relay as switching relays solved nothing...
Truck runs normal when i disconnect the relay after starting. "CLICKING" is very random and sometimes doesnt temporaily kill the motor all the time. Sometimes the truck stutters when there is no audible "clicking" noise from the relay. Too, it seems to only want to do it under load. Difficult to recreate at idle in neutral... Very strange.
Anyone ever experience anything remotely like this nonsense? Thanks in advance.
Cheers@!

 

[stevebradford]

This is a common problem lots of others have had this issue and it’s usually been a loose/corroded connection or a bad ground

I have had issues with connections in these places.

- Battery’s
- the + wires from the common lug in a small black box 6 inches from the left side battery?
- ignition switch (you would notice other problems like dash lights at the same time)
- ignition relay (you would notice other power problems like dash lights at the same time)
- the edic controller gets dripped on when the window seal leaks.
- the wire from the oil pressure switch.
- ground straps
- there are position contacts in the edic motor it’s self
- the engine compartment edic connector

Wiring diagram.

From here.
http://www.globalsoftware-inc.com/coolerman/fj40/schematics/FJ60/1983FJ60/1983FJ60.pdf

 

[cruizerbuddy]

I wish it would do it at idle/neutral so i could poke around for voltage spikes/drops. but it just refuses to unless there is a load...? i'll check all the connectors and try and ohm them out best i can. still trying to determine where all the wires off the fuel relay connection terminate. thanks to your diagram; i now know which ones run to the edic controller (which i'll check for corrosion). Not sure what you mean on the second bullet point that you make? But i'll do due diligence to touch all the components you prescribed. Not sure if i understand the "Earth" ground concept yet. but i doubt it's a ground if the truck runs proper when the relay is cut out...? For now until i can figure something out, i'll have to unplug the relay once started IOT drive her. yum

 

[RhinoRig]

I've had this problem in my 2H for a while until last night. It was raining hard and the relay was cycling every 4-5 seconds causing the fuel to cut out and hiccup. I puled the kick panel and the wires were dripping. I dried everything and hit the road again. It was OK for a few miles but as soon as I started up the big hill, it come on again like before. The truck is grounded until I can figure it out.

I was supposed to go to Moab today...

 

[duncanrm]

I was supposed to go to Moab today...

Go anyway.. just pull the EDIC Arm off the Fuel Control Lever.. you'll have to stall it to stop, but it'll stay running otherwise.

 

[handcannon]

Or, when you need to turn the motor off just open the hood and manually move the fuel control lever to the off position.

Don

 

[BreckenridgeCruiser]

Look up edic funky chicken... Worn brushes in the alternator can also cause this behavior for some ludacris reason. When you search some other people have had issues based on the oil pressure sensor in the EDIC circuit.

 

[gerg]

When I had this issue cleaning up all the grounds in the engine bay and contacts on the EDIC harnes solved it.

 

[dare]

Mine has done this a few times. 1st was a wire near the EDIC motor had rubbed through its insulation and was shorting.

Also a loose negative battery terminal caused it.

The other times the wire had fallen off the oil pressure sender and was earthing on the block/engine mount.

 

[cruizerbuddy]

The diagrams are super helpful. I thought for sure it wasn't the EDIC but i was able to confirm that it is. OHM'd the 4 wires off the plug back to the relay and everything came back good. I imagine the short (if it is actually a short) is perhaps inbetween the relay and the steering column. I'll be sure to check the alt for fluctuations in voltage and check all the grounds. While it's a Canadien rig with plenty of rust, it doesn't leak water anywhere. But in fairness to the conversation, the brake light is always flickering randomnly as well as the filter light. SO.. i think i have alot of wiring issues that are finally causing driveability issues. For now, i simply unplug the relay after starting and reconnect to kill the motor. Until i isolate where the short or whatever is, that'll be how it has to be. Really was hoping it was the pre glow circuit as i was prepared to simply cut it out as i can't start this 3b without assistance from the Wilson switch anyway.. I may just turn this rig into another donor and get jamming of my FJ/BJ swap project.
Thanks for the replys. I'll post once i dial in what's up.

 

[cruizerbuddy]

So it was the oil pressure wire, or at least what i believe to be the EDIC low oil wire that resides @ the oil pressure sending unit. It was dangling there and arcing off the motor mount. Capped it off and it resolved the problem. I remember reading, but cannot locate the thread, where a gent explains how this second wire works? I believe it's supposed to hook up to the sending unit direct and if low oil pressure is detected i believe this wire shorts the EDIC?? does that sound correct? I'm going off memory but i've read so much the last week that i could have some details garbled up here. Thanks for you help. I'll continue searching for where this wire belongs and reattach smartly. Thanks again.

 

[Tapage]

When I had this issue cleaning up all the grounds in the engine bay and contacts on the EDIC harnes solved it.

my case to .. those controllers are getting just plain old ..

 

[dare]

With that wire if the edic detects no oil pressure (oil pressure switch goes closed circuit) it shuts the motor down. This excludes roughly 5 seconds after the motor has been started.

With mine if you use a Ryco oil filter the EDIC shuts it down after 5ish seconds because the anti leakback valve in the Rycos is rubbish and the whole system has to fill with oil again so there's no oil pressure for longer.

 

[rlmmartin96]

So I have an HJ60 with this same issue and I found that the ground had completely burnt through going to the oil pressure switch. I rebuilt the wire but it’s still giving me the same issue. The loom that the oil pressure switch is connected to has 3 wires coming off of it: white/black, black/white, and yellow/black. I currently have the two black and white wires connected connected to the switch. Do y’all know where the yellow/black wire is supposed to connect? Did the previous owner just mess up and wire it incorrectly? Any advice is appreciated.