Not turning over
 

i have a 1990 300zx non turbo and i pulled out the air box and put a stillen cat back exhaust on but no it just makes a wierd clicking noise then nothing when i try to start it could it be the solenoid?

oh and the dash lights flicker when i keep the key turned trying to start it

The battery is dead.

zlover is correct.

the battery is not dead its on a charger lol

Then your charger isn't working or you have corroded battery terminals. But the bottom line is that your car is not getting the voltage it needs for the starter to kick in. The clicking is a tell-tale symptom. Trust us, there is nothing else it can be other than the battery or its connections.

the terminals are not corroded and the battery has planty of power im not that stupid it makes 1 click then doesnt do it again even if i try turning it over again

Then try some of the other suggestions. Voltage doesn't mean shit when you need a couple hundred amps to start a car. There is also a huge section for this sort of thing in the FSM as well.

It's true hoov is right, I've had plenty of batteries read out to 12v+ and had no cranking amps. Get a new battery, or try switching batts between cars and see if it starts, sometimes jumping it is not enough...

Since you were underneath the car ****ing with the exhaust system, check the starter's connection. Since the positive wire from the battery leads directly to it, and you were playing around near it, it's possible that you bumped it loose (or that, if it was corroded, you broke some of the connection, etc). Hell, it could be shorting against your exhaust, even. (Even if you left the cats on while you installed the cat-back, there was undeniably some motion in the exhaust system near the starter.)

thanx i guess i am the retard it wouldnt get jumped and it was the battery got a deka so it doesnt happen again.....

That'll teach you to doubt me.

Its posts like this that make me an avid reader of Zdriver

Same Exact ISsue Wont turn over
 

IM having the exact Same Issue with my 90 300Zx Na. Everytime i attempt to start it on some days it will just click and shut down. Once the click happens I Wiggle the NEgative battery Terminal and the Dash lights back up and everything. Just bought brand Battery and Terminals and it happened again.

To add to that. The Wiring on the Z32 is extremly Annoying! Everytime to move the Negattive Ground to get the Dash to light back up and attempt to turn over. I have to move the Ground away from the ENgine cause one day i was under the 300 and told my buddy to start it and I seen Sparks by the Firewall kinda.