1977 280z injected

[kowboy007]

just got 77 280z 2+2 . will start cold but after a few min. starts to smoke and dies. some times will start later and runs good but idles a little high.iv replaced cold start and severl other things were replaced before i got it. the iginition has been punched but key turns on and push butten to start

[Skib]

have you taken a look at the plugs, rotor, cap, valves, ect?

 

whats the timing at?

 

what colour is the smoke? whats it smell like?

 

has it been sitting?

[WAGON JON]

Welcome to Ratsun! Looks like a project. Start with the easy stuff like a tune up-plugs, wires, rotor, and cap. Then a valve adjustment, new gas in the tank, basically the simple stuff. Then tackle the harder stuff. Was the temperature sensor replaced? Is the timing right? Work your way through the problem. We are here to help too. Just ask! :D

[datsunaholic]

I suspect the temperature switch is bad and causing it to think it's always cold. It acts like an "open" which then tells the ECU to open the cold-start valve to make it richer. Disconnecting the sensor won't help, as that's the same as "cold". You have to short the sensor leads, then it thinks it's "hot".

 

It's one of the 2 sensors on the thermostat housing with Bosch plugs. The other is the thermotime sensor, but I can't remember which is which.

[kowboy007]

replaced most every thing will check thermostat.thanks guys let you all know later.