1991 toyota land cruiser hdj81 japan spec

You're quite correct, use this set-up for the second starter relay:- 2nd._starter.bmp

Relay is hooked up and tried Re programing the tach. Having the same problem should i try different wires on the 454t Orange / YELLOW? ORANGE / white?

Try increaseing the revs and reprograming.

my truck currently idles around 600 rpm i have tried to re-learn the tach at around 1300 rpm and the truck still will not start when it is cold... however if i change it to timed mode truck will start at 0.8 seconds.. im not sure what else i can do unless to try relearning at even higher rpms 1400 to 2000 rpm??

Did you say you had a Bitwriter, disconnect the glow plug and make wait to start 5 seconds at least, wire that relay as I showed you or all bets are off, leave the crank at 0.8 seconds and the revs at 1200+, also renew your batteries and take into account the age of the vehicle.

yes I do have a bitwriter. and the relay is hooked up according to the diagram you sent me. the tach is learned at around 1200-1300 rpm the crank time feature only works if the engine checking mode is set to off.. if the engine check mode is set to "Tach" the timed changing the crank time does nothing.. I just replaced the batteries in the truck... I know the truck is old 1991 but it starts fine with the key. i tried virtual tach but it will not stay running seems like only timed mode works.