viasloth

Im posting this in 2 different spots cause im unsure where it should be. but i have 78 280z 2+2 i got from a good friend that no longer has time to work on it and his wife made him get rid of it. i was told it starts fine and all, but once its running it heats up and shuts down. i dunno if it overheats and shutsdown or if it happens when it gets warm, either way i need some help, and wanna know if this is an easy fix or not and what the problem might be thanks

NismoPick

Welcome to ZDriver!

Kinda hard to fix a problem, when we don't really know what the real problem is. It could be a lot of different things.

Start with checking spark & fuel pressure when the problem happens.

viasloth

yeah I hear ya on that, i just havent been able to go pick it up yet so im not really sure just yet and since ive never had a Z and dont really know anything about them. but im gonna try and pick up this weekend and maybe i can give a little more info on whats happening. thanks for the reply though

viasloth

ok some new information. it shuts down once it reaches operating temp. i hope thats helps a little more. any help would be great thanks!

theramz

It could be as simple as a clogged fuel filter (2) or a bad fuel pump. There is an additional injector on the intake manifold (cold start valve) that turns on when it is cold and off when it is warmed up. It may be enough fuel but it turns off when warm so there isn't enough fuel pressure to keep it running. Time for you to download the Z bible (fsm)

JSM

That is true. I've seen a Z run only on the cold start valve. You go to give it gas and just falls on it's face. This one had other issues so it never shut off, but the main injectors were not firing.

viasloth

awesome i will check on that and thank you.