13bt shut off problem

[wayde marshall]

hi all,
i have recently put a toyota 13bt motor into my bj73 land cruiser. It is all hooked up and runs well apart from the fact that it won't turn off at the key. I am led to believe that is a vacuum shut off but i don't know much about it. the old motor that was in it was a 3b which was well past its best. Any advice on how to get it shutting off at the key again would be appreciated.
Cheers

 

[Oldtoy74]

hi all,
i have recently put a toyota 13bt motor into my bj73 land cruiser. It is all hooked up and runs well apart from the fact that it won't turn off at the key. I am led to believe that is a vacuum shut off but i don't know much about it. the old motor that was in it was a 3b which was well past its best. Any advice on how to get it shutting off at the key again would be appreciated.
Cheers

Vacum switching valve (VSV) located back left of block down low, follow some of the vacuums lines till you find it, if you can find or google b series manual, it will provide some guidance on testing to see if it shot or not, could be a loose connection somewhere, Or............. Maybe one of the Vacum lines are not connected, in particular this one, it caught me out when playing around on replacing some lines? No doubt others will chip in with their vast experience

 

[Oldtoy74]

Orange washer sitting on VSV
Orange washer on vac line to intake shutter valve, double check it's connected both ends
Light reading to assist?

 

[wayde marshall]

Awesome! Thanks alot ill try that out

 

[cruiserdan]

View attachment 889312 Orange washer sitting on VSV
View attachment 889313 Orange washer on vac line to intake shutter valve, double check it's connected both ends
View attachment 889314 View attachment 889315 Light reading to assist?

Great info.

Is vacuum applied to open the valve or to close the valve?

 

[Oldtoy74]

Vacum closes the intake shutter valve, Eg 1, engine running 2,remove vac line to actuator, 3 turn ignition off, engine will continue to run, 4, reinsert vac line to actuator , ...and watch actuator lever / hear diaphragm close valve stopping engine then valve slowly reopens,
Refer to above VSV page part c, on voltage and direction of vacuum, as actuator vac line is connected to e,

 

[Shes Mad]

The vacuum actuator pulls IN to kill the engine

 

[cruiserdan]

Copy.

I just tested it manually. and now I have a quick and easy emergency shut-off procedure.

 

[shamusFJ73]

To shut it off manually there is also a fuel cut lever on the pump

 

[yotahed]

Not sure why Toyota didn't just use the mechanical lever in the first place. Probably for a smoother shutdown. At least with the manual lever, you know it will shut off. This how my pump will be rigged...

 

[Hulsty]

Intake shutter protects against other items which the mechanical pump lever cannot do. In the event of engine runaway from oil filling the intake from the turbo or PCV line the engine can be stopped via the key. If the significant amount of water enters the intake the engine will also shut down as the increased vacuum in the intake with automatically shut the intake shutter.