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Mini one petrol 1.4 blue smoke on overrun

Occasional misfire and blue smoke on overrun. Orange engine light on

Posted by Anonymous on

4 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

rabbit7954
  • 417 Answers

SOURCE: getting a intermittant misfire

Check your ignition coils. If you don't have a coil for each plug then I'd bet thats going to be your problem. That or your spark plugs. I'd start with the coil that cylinder 1 runs through first though.

Posted on Nov 14, 2010

Zim1308
  • 543 Answers

SOURCE: I have a 1997 bmw

Multiple misfires usually are caused by a bad crank sensor, some times it can be a bad cam sensor but that usually does not go bad.

Posted on Jun 27, 2011

  • 5252 Answers

SOURCE: Smoking on acceleration after overrun

Maybe a leak-down test on number 4 could find it. Cylinder wall wear, maybe?
At least you got a good head if you have to rebuild the engine, that is, if worse comes to worse.

Posted on Jul 11, 2013

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Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise. An external engine oil leak can drip onto hot engine and exhaust parts causing what appears to be blue exhaust smoke. Other possible causes of blue exhaust smoke include: piston wear, worn valve seals, a dirty or non-functioning PCV valve, worn piston rings, an intake manifold gasket leak, worn engine oil seals and possibly even head gasket failure.

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check air filter & air inlet to see if clogged

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