I just ran my 1997 Nissan 200SX Se through emmisiions. It failed due to an ERG valve issue, I have replaced the bad vaccume line on the EGR value so it should be good. How do I reset the trouble codes so I can run it through emmissions again?
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Usually it's the solenoid that supplies vacuum to the EGR that fails. Trace the EGR vacuum supply line back to the solenoid and test it to make sure it clicks, allowing vacuum to flow to the EGR valve. If it doesn't click when current is applied to it, replace it.
We have two Nissan 200sx's, a 1995 manual and a 1996 auto. Both had this problem and both turned out to be the same thing. The "idle air control valve." It was most noticeable if you ran the air conditioner and then came up to a red light. You would have to keep pushing on the brake and race the engine a little to keep it from shutting off. Replaced that part and both cars have never had the problem again.
Symptoms of a bad EGR valve are usually stumbling idle or the engine stalling when the car is warm (normal operating temperature). Find the EGR valve and locate the vacuum line attached to it. Start the engine cold and wait for it to warm up. When the engine starts to stumble, pull off the vacuum line. If the EGR is bad, the engine idle will stabilize and no longer stumble.
ok you can take the egr valve off and clean it and if that works you my need to take it to get reset on codes other then that also check vacum lines if these do not work you will have to replace and i hate saying that because this part is high.. good luck to you and have a blessed day..
there is an EGR vacuum solenoid somwhere that controls on/off vacuum to actuate the valve. i am not to sure of the location, but follow the vacuum line back from the egr until you find a device that looks like an electrical check valve for vacuum. that is a possibilty. but then again i am a ford,chrysler guy and am just giving you an answer based on my understanding of the functuality of a vacuum egr system