1986 Nissan 300ZX "emission test fail high co" Questions

...HIGH CO 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. ...

...emission. This are results: Fast Idle Test:CO 0.620 Second Fast Idle Test: CO 0.636 Natural Idle Test: 0.809.! The guy from MOT will do an investigation on monday.... but i want to know what i can do ...

...high .. your car fails the emissions test. I believe in the USA the emissions test is known as the 'smog test'? If you have a problem with excess CO emissions on a car the cause is often an incorrect ...

...test, co was to high. tune was just done. Could I just service the fuel injection system to fix the problem, or replace the evap canister? theres 3 things ur emisans fail on 1 spark plugs 2 air ...

...test again,nox is high and Co's are too,what are the air/fuel settings and timing specs. Failed emissions test again,nox is high and Co's are too,what are the air/fuel settings and timing ...

...high CO!!! WHAT ELSE CAN I DO TO GET IT TO PASS??? and the crazy thing here is the First test was as follows HC 0.96 APPLICABLE STANDARD - 3.00 PASS CO 25.05 APPLICABLE STANDARD - 25.00 FAILED BY .05 ...

...test High speed HC 333 CO 3.75 Low speed HC 406 CO 0.07. I ran about 5-6 tanks of gas through it using lucas fuel system cleaner every other tank and changed the fuel filter twice. I replaced the ...

Emission test by codes reader? or smog? Any codes? This is most likely a tune up issue. The HC is unburned hydrocarbons. That is from running rich. The high CO is carbon monoxide and it is due in part

...low for one test and high for the other only thing i can think of is a sticky egr. Sticking egr will raise everything except nox. Bad o2 bad cat hard to give an accurate diagnosis with out checking ...

...test with hi CO and HC levels. What are the most common emission issues with these vehicles. Not sure, but did you replace the oxygen sensors. Is your catalytic converter still good? Change your ...