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A6 / S6 (C5 Platform) Discussion Discussion forum for the C5 Audi A6 and S6 produced from 1998-2004

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Old 01-22-2014, 08:09 AM   #1
steveinky
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Default Cold weather woes

'01 A6 2.8 Quattro: Below zero this AM and hard to start. Car popped and bucked and I had to keep my foot on the gas for a few minutes before it ran normally. Had similar experience last year and replaced coolant temp sensor and that fixed it. Same problem again?

Then 10 miles later I smelled gas, pulled the engine cover and the high pressure hose going to the fuel rail was dripping. I shut it off to think about and after it dried off, I started it back up and no drip!~? So I think maybe the super cooled gas shrunk the o-ring enough to allow it to drip. Anyone experienced that?

Any insight is appreciated.
Steve
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Old 01-22-2014, 08:15 AM   #2
tester123
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Quote:
Originally Posted by steveinky View Post
'01 A6 2.8 Quattro: Below zero this AM and hard to start. Car popped and bucked and I had to keep my foot on the gas for a few minutes before it ran normally. Had similar experience last year and replaced coolant temp sensor and that fixed it. Same problem again?

Then 10 miles later I smelled gas, pulled the engine cover and the high pressure hose going to the fuel rail was dripping. I shut it off to think about and after it dried off, I started it back up and no drip!~? So I think maybe the super cooled gas shrunk the o-ring enough to allow it to drip. Anyone experienced that?

Any insight is appreciated.
Steve
Time to change O-Ring and/or fuel line if it is pressure fitted.

"Cold" starts can be troublesome. Add some dry gas in winter to tank to remove any moisture.
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Old 01-22-2014, 01:12 PM   #3
Airbag
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Sounds like it could have been a frozen fuel return line too.. Keep the car above half a tank during extreme cold weather.
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Old 01-22-2014, 01:12 PM
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