hello kei world ! i am having a problem with my daihatsu hijet s81p model . it wont lockup in 4x4 . where do i start ?any help is appreciated . thanks ! p.s. for all the sick sense of humor people , yes it does have gas/petrol.... lol (j/k)
2nd the vacuum lines. The S80 should have a external actuator on the diff. When selecting 4x4 you should be able to see it go in and out. It is vacuum operated.
it does move , it dose it randomly . in 4x4 (keep in mind it is a right hand drive model) should the lever on the diff be towards the drivers side or passenger? i think it may be a line or a weak actuator . thanks in advanced
vacuum leaks are 85% of carb and idling problems, use a vacuum gauge or carb cleaner, carb cleaner will send the engine to high idle if you have a vacuum leak, make sure the vacuum port in the air cleaner canister is working properly, also check that your vacuum advance hose isn’t cracked coming off the distributor to the vacuum manifold tree. The vacuum manifold tree is brass on the bottom to go in to the block and plastic on top. Plastic wears out with time and will break or leak, which causes a vacuum leak. Some manifold vacuum trees are 3 or 4 port, make sure to replace it with a new one. When I buy parts I buy 3 at a time that way I have them on hand or in case they can’t get them any more. The vacuum manifold tree is located behind the carb. If you looking at the carb from the right side of the bed, it will be to your 1 O’clock tucked down inside. Remember to use a marker or different colored tape to mark the vacuum lines so you know where everything goes back too! Good luck!’
