1990 Nissan 240SX - Answered Questions & Fixed issues

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Check earth strap from engine to frame and battery to frame.

I think that your motor is over heating have it check at a nissan dealer

Sounds like timing. OR it needs a distributor cap and rotor. Pull the cap and inspect the inside contacts. If you see them a "white powder" looking substance coating where there should be brass i the top of that cap, simply replace the cap and rotor button and thank your lucky stars. lol. (Go ahead and give it new spark plugs, while your there. imo) If not, it may have jumped time. Call a mechanic.....

The reservoir is on the inside fender. Find the pump and follow the hose up to it. :-)

1st check all the fuses supporting the HVAC system. Replace all that are suspect. If the fails, be prepared to trace check all wiring and connections in the hvac system.

battery is junk wreck shifted the plates

I had the same problem with a 240 of mine. After I gave up trying to figure it out, I took it to a shop. They replaced the green circuit board that reads where the floater sits and no problems since. May want to look into that.

They are usually held by 2 or 3 bolts and a metal line remove metal line first it unscrews than unbolt. make sure you have a new gasket with it. their is usually a vacume line that just pulls off. Clean area where gasket was .put on new gasket than rebolt to block .

The batteries may not be lasting because you may have a problem with the alternator. If you have a bad alternator the car and the electrical components will drain power directly from the battery instead of taking the power from the alternator. Have the alternator tested to see if it is good.

a lot can cause a problem as long as ur not over heating u should be fine but have leak checked out and proper repair made

Try this diagram, it should help you out.

G'day mate , standard ratio for leaded petrol was 14.7/1 with unleaded fuels it will be slightly higher , around 15/1 due to the lower ' thermal efficiency ' of the fuel. hope this helps

it is done by the computer.the computer drives a unit called an IAC on the throttle body.it is an idle air control valve.

Hi,

You will need to check the crank angle sensor which is on bell housing of the gerbox and also check that the cam timing sensor is working also. This is positioned on the front of the motor on the timing chain cover. Let me know if you need further assistance.

Jason

auto transmission yes... need replace tranmission or repair. Go to mechanical, ask them.

Possibly bad TPS sensor or Bad MAF sensor.

1) Does is crank / spin properly?. Good battery and connections?
2) Does it have high mileage? Check compression.
3) Fuel injected? Maybe cold start valve not working properly.

My best guess is check fuel delivery. Clean? filters, lines, good fuel pump?
Also ignition could be faulty. Good plugs, wires, cap and rotor?

Good luck!

it should not overheat when moving even if doesnt work .either the rad is blocked or the head gasket has blown

Replace the turn signal flasher mounted under the dash, drivers side, passenger side of steering column on support bracket.