Nissan Repair Questions? Ask a Mechanic for Answers ASAP
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How long does it run ruff when first started?
If you pull the spark plugs out, and look down at the pisitons, are any of them looking fairly clean? You should see a layer of carbon on them. So you really shouldn't see any metal. Also let me know what brand spark plugs you have installed?
Ok.. That is good with the plugs.. I am thinking that you may have a bad head gasket. When the truck cools down, coolant seeps into the cylinders and that is why it runs ruff when first started. I would have it checked to verify.
A clogged PCV valve can cause a oil consumption issue which could effect Miles per gallon.
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