I also had this in my '92 525i, check the rubber fuel lines just after you
shortly started the car and shut it down.
When you let the engine heat up the fuel will evaporate immediatly, therfor
you need a cold engine.
Starting it shortly will pressurize the fuel lines, so a leak can easily be
Marcel, '92 email@example.com km
Some VAGUE idea of what year/model you're waffling on about might be of
Of course if that's too much trouble..
And I have lots of experiences other than that. What ones do you want to
How about the one in Vegas with the three strippers?
That said, the original poster has a gas leak. It does not take a lot
of gas leak to make a very strong smell. With the high pressure the
BMW fuel systems run at, it does not take a lot of rubber damage to
produce a leak, and it doesn't take long for a small leak to turn into
a large one.
Pop the hood, start the engine, and start looking at the fuel lines.
You may not see much other than a slight darkening. You may have to
feel it. But you'll sure smell it.
"C'est un Nagra. C'est suisse, et tres, tres precis."
I was thrown off by the specification that the Defroster was part of the
trouble. I would follow your idea if the issue was posted as occurring
whenever the ventilation system was in use because the air intake is in the
vicinity of where fuel might be leaking in the engine bay. I can't think of
a particular issue that involves fuel and the defroster but does not involve
fuel and the ventilation system. Perhaps the OP keeps the vent system off
unless he is defrosting ...
The air conditioner also does that, but I think the AC does not turn on just
because the vent selection is to blow air at the windshield. Having said
that, the recirc. is also not selected or de-selected just because one
desires to blow air onto the glass. My Ford decides if I want the AC on or
not, and frankly I haven't figured out what makes Recirc operate (other than
the Max AC selection), but when I select the setting to blast air on the
windshield, my truck decides that I must want the AC to blow too. In my BMW,
I can make these choices independently of one another.
My point being, I can't think of any setting on my BMW that would make fuel
come into the cabin on Defrost only.
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