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Rough cold start

What are possible of very rough cold start? Dealer says it's normal but am first experiencing this after 3 years of ownership. Car is garaged but does get around freezing temps during winter

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Posted on Jan 02, 2017

  • 315 Answers

SOURCE: rough idle in cold temps

Maybe it needs a tune up?

Posted on Mar 17, 2009

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Car hard to stat or not start at all if starts idles for few min then dies wont restart


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It was very cold, the car sat in the garage for 3 days with very lower fuel, now it idles rough and sounds rough, did I ruin something by not having enough fuel when cold?


No,low fuel isn't your problem. If there's enough fuel for the fuel pump to pick up your car should run okay. You haven't ruined anything. It's not your fault.

It is possible that a low fuel level - very low indeed - has allowed debris/dirt into the system and is causing a blockage. However, I think this is quite unlikely to be the problem you have.

You say the car idles rough - does it drive at speed okay? If it drives okay at speed you can rule out most fuel problems .. most.

Backtrack a bit .. has your car ever ran/idled roughly before? Cold weather can exacerbate a problem.

It could be the cold weather- fuel and injections system have cold start devices or sensors of one sort or another. It may be a faulty sensor. Get somebody to do a diagnostic check for you

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I recommend replacing the fuel pump. I once experienced a similar situation with an Audi Quattro that was sensitive to temperature and would stop running when it was warm.

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It's flooded like you say.
If it's really flooded, you'll have to remove plugs and dry them off.
Install them.
Now when you crank engine, hold gas pedal to floor.
That will stop gas from spraying into engine.
You need to get the gas out of the engine for it to start.
Crank for 20-30 seconds with pedal to floor. Do this 3 times waiting 2-3 minutes inbetween cranks.
The starter needs to cool down.
Then after that start normally and see if it will start.
Remember if it will not start after 2 attempts, then the possiblity of it flooding is there and you'll have to clear out the gas by holding the pedal to the floor again.

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