Question about 2000 Nissan Altima

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My 2000 Nissan Altima will falter when it gets warm. Months ago my mechanic cleaned the EGR and then two weeks ago, I changed it for a new one. He had cleaned the manifold saying the port at the manifold was a bit clogged. Today it left my wife stranded (not a good thing) and sent a plume of white smoke...smells like oil. After it cooled, it started and ran fine. The pattern has been for OK when cool (10-15 miles) and then faltering/shuttering when warm.

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  • jim4137 Jun 27, 2009

    My mechanic already checked the Fuel Pressure...OK. Surfing other blogs I have discovered that the second Cat Converter commonly mucks up and causes back pressue issues and even burping trash from the first Cat Converter into the exhaust manifold/valves. Advanced/ignored problems have even trashed the motor.



    The problem exists when the motor is hot and often will first show the trouble at higher RPM (50 MPH). But once it has surfaced, it won't stop, until the motor just stops after a lot of faltering.



    I am about to gut the second converter for the cure. Let you know how it comes out.

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Try having the exhaust back pressure checked. Check the fuel pressure & filter. I don't think the egr has much to do with this. There's more to test but start there & write back.

Posted on Jun 27, 2009

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