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

pfontana
0

Asked by Apr 15, 2013 at 05:28 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. I don't believe it is valve guides: one you would have blue smoke, not black. Two it doesn't happen on every cold start, or even after vehicle sits for a short while giveing time for oil to drip into cyoinder. It is only fuel related

6 Answers

judge_roy
Not Active

I think your fuel pressure regulator is faulty- this diagnosis is completely un-tested---but it's a start~

1 out of 1 people think this is helpful.
tenspeed
77,645

Check the regulator. Look for fuel stains and look for gas in the vacuum hose.

judge_roy
Not Active

there might be a spaghetti of leaking vacuum ole' butyl rubber which degrades and leaks. I recommend silicone vacuum hoses (from summit racing and other places too) this way they will not leak..in my experience as a mechanic, we'd sometimes scam the silicone hoses replacing them with butyl from unwitting Berkeley customers because BMW uses them~

7jimmy7
16,045

fuel problem ,codes will set. then scan codes. may be o2 or coolant temp. sensor

judge_roy
Not Active

gasoline smell, 7jimmy7?

7jimmy7
16,045

after 5 minutes all clear, has to be a rich mix. ,otherwise, will stay that way

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