Nissan 300ZX - Popular Questions, Answers, Tips & Manuals

Next to the clock there should be two circle buttoms, you can/need a toothpick or a pen to actually press them. They're so hard to press with just your finger.

Loosen and turn over or use a mirror to locate all the green stuff (corrosion) clean all the bad connections and you should be good just check everyplace you had your hands.

Depends which cable is being replaced , earth cable from the battery needs to be the same size as the one going to the starter motor , earth cable from transmission to car chassies needs a braded cable, 4 gauge should be ok for most other places .

Anonymous, It sounds like you have a bad speed sensor on your 300ZX as these sensors provide input to the ECU on when to shift your transmission.....Figure out where it is and replace it and your problems may go away.

if belt broke may have some damaged valves or belt installed properly

connect it to a scanner

check for fuel compression, gas filter and try, a gas treatment, you buy it at auto zone the gas treatment is suppose to clean the jets . if you think is a valve issue then you should give it a compression test I would use the type gauge that screws to the piston hole and check each piston for compression. good luck.

If the security light is on then the car thinks someone is trying to steal it. If you can’t make the remote work then you might be able to clear it by disconnecting the Negative battery cable for about 10 minuets

make sure it is not a worn switch.

Try the crankshaft sensor

Plug in a scan tool and watch everything as it bogs down.

Are you sure you have the correct gearing for the differential? It appears there is alot of torque being applied and it is causing the spindles to shift. Check your springs also.

check for a vacuum hose leak ( brake booster , transmission actuator module, vent controls )

the throttle position is bolted on to your throttle body, you should check your air flow meter also, the ecu, located behind the passenger kick panel, has a self diognastic mode with all the code definitions listed on the ecu, if i remember correctly turn the key on , dont let starter engage, pusk gas pedal to floor, release, then the ecu will bling red and green, two red blinks and one green means code 21 and so on

Sounds like computer issues from the cables being on wrong

Try twinturbo.net. plenty of 300zx enthusiasts and info on that site. Has a tech forum and links to faq. Look around and search. I go there for help on my 93 Z. And no, it doesn't have to be a turbo model.

the ecu is located behind the passenger kick panel , there is a little window at the top of it which has 2 lights in it red and green, turn the key to the on position, do not start engine, push gas pedal all the way down then release, the lights will start blinking, for example if you get 3 green blinks and 2 red blinks that means code 32, 5 green and 1 red code 51, there is a list on the front of the ecu that tells you what each code means

have them check the tranny solinoid

Try changing the fuel filter before you get too involved. See if this video helps - How To Replace Fuel Filter Nissan 300ZX

-Possibly the main fuse or possibly there is a relay for all of those circuits. Check it out. Good luck Mai