[问题] 排气测试氮氧化物NO超标了！
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LOL to the above
suggestion: Change spark plug, change air filter, try some SeaFoam, change ur PCV valve, try some injector cleaner (added to fuel)
and then warm your car to working temperature, rev pass 4k, drop it down to idle, wait a few sec, do it again. careful not to destroy ur engine
or go out there, find a strait road with no cops and stop signs, stop, HARD accelerate, stop, HARD accelerate
finish the tank of gas with the injector cleaner
go try it again
shake those god darned junk out of the engine
it's good for your car to once in a while redline it.... just once in a while
my mom always said the car performs better after i drive it for a while.... because I floor the gas pedal more often. heavy strain on the engine once in a while shakes the dirt and carbon loose from your engine, and the strong flow of air just blows it out:smokin:
confirm with Hei Ge on this
suggestion: Change spark plug, change air filter, try some SeaFoam, change ur PCV valve, try some injector cleaner (added to fuel)
and then warm your car to working temperature, rev pass 4k, drop it down to idle, wait a few sec, do it again. careful not to destroy ur engine
or go out there, find a strait road with no cops and stop signs, stop, HARD accelerate, stop, HARD accelerate
finish the tank of gas with the injector cleaner
go try it again
shake those god darned junk out of the engine
it's good for your car to once in a while redline it.... just once in a while
my mom always said the car performs better after i drive it for a while.... because I floor the gas pedal more often
. heavy strain on the engine once in a while shakes the dirt and carbon loose from your engine, and the strong flow of air just blows it out:smokin: confirm with Hei Ge on this
NOx too high because of the temperature of the combustion, not because of the dirt.
Tune up might help becasue not necessary.
If you are a mechanic, you might be able to play with the timing to lower the NOx.
But once NOx go down, the other test gas like CO properly will go up.
Everytime you do the test, you should use the highest grade fuel, change air filter, change spark plug and engine oil. It help in general. But this won't improve the NOx. NOx too high because of the combustion temperature.
Tune up might help becasue not necessary.
If you are a mechanic, you might be able to play with the timing to lower the NOx.
But once NOx go down, the other test gas like CO properly will go up.
Everytime you do the test, you should use the highest grade fuel, change air filter, change spark plug and engine oil. It help in general. But this won't improve the NOx. NOx too high because of the combustion temperature.
NOx is because O2 reacts with N2 at high temperature.
You should first check EGR valve. Engine will return some exhust gas back to air input. One of its goal is to reduce the O2 in the input to reduce the NOx. EGR valve control it. If it is dirty or broken.There will be too much O2 gets in.
The cylinder head is too dirty. So heat can not be transfered out.The combustion temperature goes up. You can try some engine cleaner put them in the gas to clean the dirty out.
If NOx is your problem and rest of is good. Go and do the test when engine is cold.
You should first check EGR valve. Engine will return some exhust gas back to air input. One of its goal is to reduce the O2 in the input to reduce the NOx. EGR valve control it. If it is dirty or broken.There will be too much O2 gets in.
The cylinder head is too dirty. So heat can not be transfered out.The combustion temperature goes up. You can try some engine cleaner put them in the gas to clean the dirty out.
If NOx is your problem and rest of is good. Go and do the test when engine is cold.
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