okay here's my problem, ihave 85 non turbo z31, and it wont start
so 2day when i tired to start it i sprayed starting fluid in it and it does more and acts almost as if it wants to start but can't hold it or something
question im needing answered is what do i start to look at next cuz my car does that, what can i fix to solve the problem and have my car start fine?

 

Is this the same car that you were talking about in this older thread? https://www.zdriver.com/forums/300zx-z31-performance-technical-227/car-wont-start-20334/

When an engine doesn't start, it's only 3 things:

#1... improper fuel mix (no fuel, or flooded)

#2... no spark

#3... no air getting to the intake / combustion chamber.


Have you checked these three things?

 

i no there is air getting into the in take
i bought new spark plugs,
and i can hear the fuel pump on the back of the car, so anyone think it could be fuel injectors? or does a bad fuel filter sound more like it?

 

Spark plugs are at the end of the line... just because they are new doesn't mean they have to spark. The coil creates the electrical current, sends it to the distrib, which distributes the spark to each wire, then to the plug. See what I'm getting at? Check upline for spark...

 

okay gotcha, also like i said with the ligheter fluid it'll start the car for just a split second, so doesn't that mean fuel is the problem? if so what kinda fuel problem could it be? fuel pump or could it even be the injectors?

 

it could be any kind of fuel problem, or not a fuel problem at all. test things, see what works. it's called troubleshooting. replace the filter, pull some hoses and see if they squirt fuel, test your injectors, etc etc etc. we cant check these things for you through the internet. it does sound like you may not be getting fuel, but many things can cause that.

 

Broken timing belt.

 

okay when i replace the fuel pump,filter,and injectors here soon, if that doesn't make it start then where else should i look?
or what else wouldn't hurt to replace quick while im replacing stuff?

 

my 1986 turbo woulfd have same problem 2 days after it rains........was the water coming into the car via the windscreen gasket and getting into the ecu............check it out .............

 

so ur saying the ecu might be corrupt?
also i have a question, when i try to start the car i hear the fuel pump in back make noise the whole time, is that suppose to be like that, or is that a sign saying the fuel pump is bad or something? i have no clue here so any help you guys have really helps me, thank you

 

She means that water & ecu's don't mix.


That's a good sign... if you DON'T hear the pump, that's a prob.

 

well i just hear something from the back the WHOLE time like a whinning sound or something along those lines. In your guys personal opnion what would u replace first or think it is? the pump or injectors?

 

Don't replace anything until you know what the problem is. Unless you like wasting money.

Have you checked your fuel pressure? If the fuel pressure is good, more than likely your injectors aren't spraying either because they are clogged, or a sensor not working right.

 

how do i check fuel pressure again?

 

Get a fuel pressure gauge & hook it up after the fuel filter & before the fuel pressure regulator. If the Z31 has a fuel check / relief valve, you should be able to hook it up there w/ the right adapter.

You have a Haynes or FSM right???

 

yeah i have a haynes manual,i knew how to do that,i was just wondering if there was another way to do that, that you would suggest

 

only other way i know is to pay a whole lot of money to as mechanix shop and have them still not find the problem.................

 

okay, thanks for everyones help if i have any other questions or if you guys have any other comments i'd love to hear them,
thanks again

 

oh hey just a little update, i replaced the fuel filter, and put in injector cleaner, and a new battery cause the old one was drained, then i put the new battery in and it starts making crazy noises and then smoke starts coming from the BRAND NEW battery just bought 30 mins earlier, now im just trying to decide what to do now

 

i also have another thing to add, my friend wants me to put in a supra engine, or a skyline engine, but i dont know if its worth it.
i wanan put a new engine in it---a really really good one---but i dont really now whats worth it, would it be smarter to rebuild one of those and put it in or rebuild a vg30de, or vg30dett

 

i would not suggest a VG30DE or DETT. just get a VG30ET. you can get plenty of power from one for less money than any other swap would cost.

 

Your problem can be one or more of many. I would first run the ECU codes and see what errors appear, if any.

If there's no error codes, then we can diagnose from there. It'd help if we knew the history on this car (the mileage, how long you've owned it, what you've replaced since, and what was replaced before you bought it, if you have the receipts or information).

 

Battery in backwards?