His 80 and Her 80 tandem build thread (2 Viewers)

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Joined
Aug 17, 2025
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Location
Madison, MS
So I found an add on Facebook for a 4/1994 FZJ 80 with a clean frame, a 3” OME lift, ARB Safari bumper, 12k Winch, and a custom rear tire carrier and customer roof rack. Truck has 238,000 miles on it, and it came with a “parts” 80 which is a 5/1990 FJ 80. The plan was to use body parts on the 1990 and part the rest out. Once I got home with both trucks, I started messing around with the parts truck to see what was usable and what was not. The 92 (Soon to be called Her 80) had a bad relay and cranked over after I replaced it. It only has 112,000 miles on it but has been sitting in a barn for 10 years because the PO thought the engine was blown. My wife in her infinite wisdom has now decided that we will each have our own 80’s, her’s for more of a camping build and mine for wheeling. So just as I envisioned (NOT), and building two 80’s…


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I started on the baseline with the 94. The plan was to change all the dead rubber vacuum hoses, plugs, wires, fluids, fix the AC, and run it for a bit and see what else needed to be done. Well once I started digging in, I found that I had a leak around the distributor, oil cover gasket, and the truck was idling quite high. I decided I would just go ahead take off the valve cover and and put a new seals in for the spark plug tubes. As bolts and parts started coming off, I decided to clean the throttle body. I found one of the hard lines was clogged. I have tried everything I can think of to get this hard lines unclogged. Used brake cleaner, PB blaster, small wire, even bought an ultra sonic cleaner and have been trying for weeks to get this line unclogged to no avail. I recently was able get a used throttle body from a part out and it is on the way to its new home as we speak.

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Now that I had an ultra sonic cleaner, I decided to go ahead and pull the upper intake plenum off and get it cleaned up. I had secondary motives here, since I was having the issue with the high idle, and thought I might have an issue with one or more of the VSV’s that are so thoughtfully placed in such an easy place to get to. I did find that once of the VSV’s failed the continuity test as well as not making the clicking noise when applying 12v power. I decided to order all new VSV’s with the exception of the one that is NLA, but that one is still working. Decided to take off both the upper and lower intake plenum’s since I was already there. Also got the front of the engine around the oil pump cover cleaned up, thanks to advice from @Kernal. Also while removing the lower plenum and associated wiring harness i broke off the plug of the rear knock sensor. Thanks to @Fj80oregon for hooking me up with a used knock sensor.

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