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Mitsubishi 4D46 rough idling and white smoke

Rough idling with white smoke during starting specially when the engine is cold

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 1989 chevy 350 automatic, white smoke

white smoke is antifreeze try checking the compression

Posted on Nov 08, 2008

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  • 1 Answer

SOURCE: 95 Chevy Blazer 4.3 white smoke at idle

my 1988 chevy blazer 4x4 smokes on cold starts till it warms up then it goes away what is causing it

Posted on Mar 10, 2009

  • 15 Answers

SOURCE: car idles and runs rough intermittently after engne is warm.

one of you air line pipes could have collapsed or split which will cause a problem with idling and performance and it will give no smoke signs

Posted on Feb 13, 2010

  • 180 Answers

SOURCE: F250 Diesel engine won't start in cold weather

check your glow plug relay! located on the right side head

Posted on Mar 19, 2010

  • 5 Answers

SOURCE: Suzuki Vitara V6, MAF sensor, white smoke.

i have a simialer problem but i was getting neat fuel out the exhaust as well . i removed the engine because id got a replacement then stripped the old one and as i thought it was a valve timing problem.looking at the engine from the front the cams on the left bank had jumped one tooth out of time so fuel was not being burnt and coming straight through the exhaust.strangely it didnt seem to have a big missfire and idling and smoke got worse when warm.

Posted on Jun 06, 2010

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Idles rough and smokes when first stated


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I've a 1981 Vette that idles very rough with a cold engine start.


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After my 2005 dodge magnum sits (lets say overnight) it runs rough and produce white smoke. After several minutes the smoking and rough idling stops. What causes this and what price range to get it fixed


White smoke is a sign of water/condensation (due to the coolant additive)......worst case scenario, you have a head gasket leak (minor at this stage), or you simply need a tune up......as white smoke on cold start up could be normal...has it just started happening, or have you only just started noticing it ???

When was the last time it has been serviced (plugs, oil etc)

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Rough idle noisy no power and white smoke when cold wants to stall when cold or in revers


this sounds like a cylinder head issue or gasket, this will cause the white smoke because of the coolant that goes through the engine. you would need couple of test like a compression test and it could help you get closer to pin poiting the problem.

Feb 18, 2010 | Mazda 323 Cars & Trucks

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Runing rough for 1 min. after start cold engine


What car , and year and engine? What color smoke?

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