Try checking these threads out:
https://forum.ih8mud.com/threads/1hd-fte-misfiring-hardstart.1027792/
And here
https://forum.ih8mud.com/threads/land-cruiser-hdj100-1hd-fte-chugging-honing-droning-strange-sound-upon-medium-acceleration.1290457/#post-14690985
And here...