Emissions failure 1986 nissan 300zx

I means that the vehicle failed it's emissions test as it failed the digital trouble code reading test 3
the testing station tests the exhaust emissions and the onboard computer
Your computer failed the test

Sounds like it's in failsafe mode due to major sensor failure. 90% of the time it's the MAF sensor.

I would replace CATalitic converter, this car is old, plus a tuneup is 100% necessary , spark plugs wires, ditributor cap & rotor, plus both the air & fuel filters need replaced. change oil & filter. then you will pass emissions test. and your car will run like its suppose too. if you don't do all this , then buy a new car !

Mine just failed emissions test garage said its burning oil what is the soulution

Why did the repair shop, not work on the Emission issues?
You have to diagnose and repair, what you do know is wrong,then continue on

check that the door switches are working properly.The car is acting like there is a door open.,,,also the dash dimmer turns on interior lights...

its usually a tube wrapped in factory tape just pull and itll come off

change oil and filter put a emission cleaner in fuel

these cars are known to have injector failures and that would make you fail a emmission test easily. also i would reccomend looking at your oxygen sensor.

there isn't much a person can do at home when it comes to repairing a emissions failue there are HC failures where there is unburned fuel
There is CO which is incomplete combustion poosr compression, valve problems ect.
NOX Oxsides of nitrogen which is usually over heating engine or EGR
O2 (oxygen) leak in the exhaust
Oh yea evap emissions where the fuel vapors escape into the atmosphere through a .020" hole in the fuel vapor recovery system somwhere between the fuel ank and the engine compartment Oh god you need a smoke machine to find those.
Oh god I repair emission and its so damn hard fix one thing and another reading goes wackey
There is NO WAY without a 5 gas analyzer you can hit it Please trust me I know money is tight but take it to an emissions qualified shop and be done with it cheaper and less hassle, sorry just being honest really.Here in Seattle you will find nearly no old vehicles like yours due to emissions they cant be made to pass so off to the wrecking yard they go thats the goal of the emissions program get rid of the GROSS POLLUTERS and make people buy new cars. Thats our wonderful Goverment.
But in Japan you have to my law change our engine at 40,000 mi due to their emissions laws or junk the car.
give me your phone Number and I'll call you or heres my number 253-691-6206 and try to explain it
But if I provided any helpful advice please give me a good rating

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