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1981 Datsun 720 - What engine?


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#21 RaZorback

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Posted 11 March 2017 - 02:22 PM

Thank you . Both were correct. It's a z22.ok next question the carb isn't original, it's a weber 2 barrel carb,it's a 32/36 DGV. When I got the truck all vacuum lines are off and not plugged off. He he'd the idle so high to make it run. Now I have messed around and by ear got it close. Still need to do plugs, wires, cap, etc. What do I do about the vacuum lines. I really need help. It's burning gas also

#22 RaZorback

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Posted 11 March 2017 - 02:24 PM

I know it has to be something simple I'm missing. I know about motors as such. But.... And the muffler needs welded on which causes a little power loss

#23 Lockleaf

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Posted 11 March 2017 - 03:05 PM

If you dont have to worry about emissions, only one vacuum line matters, the line from the carb to the distributor for vacuum advance. All others can be capped. Once the vacuum leaks are fixed, you will need to re tune the carb.

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#24 datzenmike

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Posted 11 March 2017 - 03:25 PM

This, above.

Muffler affects nothing.

Excessive gas use may be the choke on, stuck on or simply the choke heater not connected, and the choke not shutting off. There should be a Blue wire to the choke, it may have on a thicker black covering. There should be 12 volts on it but only when running. If you suspect it, just connect to the Red idle cut solenoid wire right next to it.


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