86 HJ61 automatic - dying while driving, now struggling to idle/run

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thrillhaus

thrillhaus

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Hoping you guys can point me in the right direction here..

I was driving my 86' HJ61 to work the other morning (short drive) and as I started going up a hill near the end of the drive my Landcruiser started to slowly lose power as I went up, even after giving a little more throttle. It died near the top and I coasted over the crest of the hill. I stopped there, restarted the truck and went down a hill and arrived at work. 8 hours later I drove home with no issues.

The next morning it started stuttering as I was in a drive-thru line (had only driven about 5 minutes). I gave it some throttle in park and it seemed to correct itself. 5 minutes later I am on my way home, and it dies as I am slowing down to pull in to a parking lot. At that point I couldn't get it started without it dying within a few seconds usually. Extra throttle just makes it run even more rough before it dies. It is very stuttery.

I gave it a few hours, came back and got it to start and idle right away, but as soon as I drove about 80 feet it stuttered, then hit a very small incline and it died again and i coasted to the flat. It wouldn't start without throttle and it would instantly putter out and die.

I am no mechanic, but can turn wrenches and do basic repairs etc. This is outside my wheelhouse and I'm not sure if there's anything I can/should check before taking it to a mechanic? I towed it home so I can do some basic inspection etc, but don't have a shop so am limited to the driveway.

Looking for some guidance on where to start, or if I should just call a shop.

Cheers!
 
duncanrm

duncanrm

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This very much smacks of a fuel flow issue and the most likely cause is that the factory sedimenter is full of gunk.. I would temporarily bypass it with a bit of steel tube to join the two hoses together and see if the problem reoccurs. If you have time then you can also remove it from the vehicle, disassemble, clean and reinstall. I have a few images of the sedimenter here that will give you some idea of what you're dealing with: 2H/12HT Sedimenter images

Other possible causes are:

  • a lift pump that's failing, see my video here: Lift Pump failure, 2H
  • the fuel system is sucking air from a banjo fitting, hose or the primer pump (screwed into the top of the lift pump)
  • the brass mesh screen inside the banjo at the Injection Pump inlet is fouled, also sometimes found at the inlet to the lift pump (Image)
  • the fuel pickup in the tank has issues.. there's a small filter on it (Image)


There may be some other causes.. but its almost certainly fuel flow or air in your fuel.
 
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Sooke

Sooke

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I had a similar issue with my HJ 61. It turned out to be a small rust hole in the fuel pick up tube attached to the fuel tank. Dirt and debris collects where the pick up tube enters the fuel tank and can cause it to rust out and make small pin holes. This will cause air to enter the fuel system.

To see if air is entering your fuel system before the fuel pump, disconnect the flexible fuel line between the pump and the last piece of hard line coming from your tank. In its place attach a piece of clear tubing.

Start your truck and watch to see if there are air bubbles in the clear plastic tubing. If there are bubbles present then there is an air leak between the pump and the tank.

If you do have an air leak you can lightly pressurize the hardline with compressed air to help find the leak. This will push a bit of fuel out and you look for signs of any fuel leaking.



Good luck.
 
thrillhaus

thrillhaus

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Thanks for the responses you guys!

I will be working on it this Sunday, so I'll start by pulling the water/sedimenter as I'm sure it could use a cleaning. I have a new fuel filter coming so I'll get that replaced as well.

At that point if the rig is still having symptoms I'll see if I can get some clear tubing and see if there is air finding its way into the lines.

*We had heavy snow a few weeks back which turned in to giant chunks of slush/ice hanging off the cruiser all over. I am wondering if the ice broke a fuel line loose and is allowing air in. I will start with the sedimenter and go from there though.

Thanks again for all the tips. I'll follow up with what I find out!
 
thrillhaus

thrillhaus

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Napa stocks a fuel filter for the 12HT. Used them for years and readily available at my local store. Glad to shoot a pic of the part # if you need it
That'd be great. I have one on order but if I can grab one locally I'll just keep the other as a spare. Let me know if you come up with the part #.

Cheers
 
CenTXFJ60

CenTXFJ60

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That'd be great. I have one on order but if I can grab one locally I'll just keep the other as a spare. Let me know if you come up with the part #.

Cheers
Cool. Just got home from a work trip to FL. I can slide into the barn manana and snap a pic of the NAPA filter. Someone else lurking here may already know the part # as well.
 
G

Godly

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You have to check if air does not enter your fuel system .
 
thrillhaus

thrillhaus

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Cool. Just got home from a work trip to FL. I can slide into the barn manana and snap a pic of the NAPA filter. Someone else lurking here may already know the part # as well.
Any chance you pulled up that part number? My shipped filter hasn't shown up. Opened up the sedimenter and it was easily as nasty as the pictures you linked. Figuring the fuel filter is probably full of junk as well.
 
duncanrm

duncanrm

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Any chance you pulled up that part number?

I know you're not asking me.. but Ryco Z169A is my goto filter in Australia for 2H/12HT.. so any of these will suit, can you find a cross ref to any of these, or a local supplier of one of these? :


 
thrillhaus

thrillhaus

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Update: A big f'ing thanks to everyone who pitched in on this! The diesel is back at it and running as strong as ever.

Dove into the sedimenter and it was loaded with rusty sludge. Cleaned that out, then pulled and replaced the fuel filter. My hand priming pump is shot, but I was able to use a hand pump and suck the air out of the fitting near the fuel filter. (Not ideal as it was pulling air in from the threads of the fitting, but in the end I got it all out).

Pics attached. Thanks again everyone!


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