TwinTurbo.NET: Nissan 300ZX forum - White smoke on decel, downhill
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Subject White smoke on decel, downhill
     
Posted by BannonZ on April 16, 2013 at 2:14 PM
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Message Hey guys,

Been looking into this for a while, but had a question for you guys. I had a PCV replacement that cured a smoke at idle problem I was having, but now Im having a new issue:

When coasting downhill in gear, I (sometimes) get a PLUME of white smoke coming out of the exhaust. If I apply even a millimeter of pressure on the throttle, the smoke goes away. If I put the car in neutral and let it coast, the smoke goes away. I'm getting pretty frustrated.

A few of the techs here took a look at it, one suggested worn valve seals, another suggested too much oil since I had the engine rebuilt three years ago. What do you guys think? I have an unrestricted exhaust system, no pre-cat or cats. 2.5" piping from the turbos back.

Let me know.

     
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