Tosh Posted May 28, 2009 Share Posted May 28, 2009 well right now the pathfinder is only a farm truck...but it still gets drove everyday. even on the hottest days the pathfinder every now and then will turn on,run rough then cut off. then i start it back up and it runs fine i also only get like 8 mpg and i smell exhaust fumes in and outside the truck any help would be appriciated Link to comment Share on other sites More sharing options...
Kingman Posted May 28, 2009 Share Posted May 28, 2009 Bad o2 sensor is my guess, along with bad coil or wires, bad EGR valve, or a vacuum leak (heat expansion) Link to comment Share on other sites More sharing options...
Tosh Posted May 28, 2009 Author Share Posted May 28, 2009 what do you mean by coils and wires..im not sure what the erg is either... Link to comment Share on other sites More sharing options...
k9sar Posted May 28, 2009 Share Posted May 28, 2009 I agree on the O2 sensor. I would also check your connector/wires on your MAF. coils refers to the ignition coil (we only have one) located above the passenger side head cover wires are the spark plug wires. If shorted/broken/high resistance, you will not get spark in the cylinders and get poor mileage and rough running EGR is the exhaust gas recirc valve that sits on the side of your intake. It takes hot exhaust gas from your drivers side exhaust manifold and feeds it back into the engine. Link to comment Share on other sites More sharing options...
Tosh Posted May 28, 2009 Author Share Posted May 28, 2009 oh i know what most of the things are when i look at it just not it's names.haha but i'll check them this weekend when it stops raining and see whats wrong Link to comment Share on other sites More sharing options...
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