It sounds like you found the real limp mode. The slow to to accelerate but still mostly drive ok just extremely slow is like stage 1, the completely dead no more than 5mph is true limp mode. Something is going on with your tune/ECU. Having a vehicle speed sensor (VSS) is not hard so I'm not sure...
The tuner is absolutely sure all the automatic logic is flashed out of the ECU? I didn't realize how long youd been fighting this. The Air injection is a common bypass, not sure how common manual swaps on VVTI equiped 2UZ's are though. I'd be assuming there's some problems somewhere along those...
Sure sounds like you are in limp mode, that is exactly how it feels. Real strange there are no codes though. Have you checked your readiness monitors? I'm betting it's something with the secondary air injection.
I tried looking some belts up on amayama and looks like an hdj100 in some markets got a 1hdt that shares a belt with the 1hz so it's possible you have a motor or parts out of one of those. 13568-19195 is the number and listed as having 92 teeth. Whatever belt you go with make sure you rotate the...
While I'm not pulling the FT out of my 80 this swap does intrigue me to replace the TBI small block in my FJ40 instead of the standard 5.3 LS that was the planned modern replacement. Is there a manual trans that can bolt to it or is the 10 speed auto mandatory?
If you started with a fresh resurfaced flywheel my bet is on oil on the surface. Need to thoroughly clean flywheel, clutch disc and pressure plate surface with brake cleaner get all the oils off and don't touch anything with bare hands.
Also make sure you torque the pressure plate to spec in a...
There's a couple of adjustments there, depending on when it's too high. What is your idle speed and when? Check it warmed up A/C off and again with A/C on.
His pics are perfect, I tried to get some but the right side was very difficult to get a pic of. With the 24v start both batteries need to ground to engine, with my 12v conversion I'm only grounding on LH side since that's my starter battery.
Both of mine (hdj81 dual battery) were in front of the engine mount. I converted to 12v start and switched out original cables so can't really give you a proper pic.
Edit to add if you need I can take a pic of the ground mounting location but I don't have exact original routing with the cables.
I wonder if the input shaft is the correct length for a 1HZ/D/FT bell housing, or compatible with the shaft that is since they are different gear ratios. Seems like another cool option if so
I've seen them let go and luckily not take out the transmission. Can get a new complete shaft from Toyota for reasonable cost or if you catch it in time just replace the u-joints. This is not something to be ignored and gives the exact symptoms of the OP