first start of the day (cold start) I get a fuel odor in vehicle, it seems to run rich, as sometimes black smoke will come out the exhust. After 5 min it is all clear

pfontana
0

Asked by Apr 15, 2013 at 03:29 PM about the 1995 Nissan Pathfinder 4 Dr SE 4WD SUV

Question type: Maintenance & Repair

On first start of the day (cold start) I get a fuel odor in vehicle, It seems to ruch as sometimes blak smoke will come out the exhust pipe. After about 5 min all is clear. vehicle runs even while all this happens.

1 Answer

tenspeed
85,855

Check the fuel pressure regulator for the gas leak/smell. It could be sucking gas up the hose and making the fuel mixture too rich. --- Black smoke on start up is a sign of worn valve guides. Oil drips down the valves when the engine is off and it burns at start up.

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