Question about 1996 Mazda Familia

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Backfire problem and bad smell smoke

2 n 3 fuel injectors (non reactions), backfire during acceleration, and bad smell smoke (insufficient gas burnings). 4 injectors are tested and all workings, spark plugs are also replaced

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  • 431 Answers

I would check the timing as this will cause it to backfire

Posted on Feb 17, 2012

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Posted on Jan 02, 2017

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SOURCE: Smoking out the back and burning smell inside.

check for a cracked head that smoke you see is probably antifreeze coming out of the coolant trench in the block itself or could just be a bad gasket on your head

Posted on May 06, 2010

  • 50 Answers

SOURCE: 1993 honda accord burning oil

worn piston rings produce blue smoke all the time especially under acceleration. time for another rebuild or total replacement.. i am not very familiar with metric but thet is still a lot of miles, replace the rings, or replace the engine, or replace the car. it sounds like it is well worn

Posted on Jul 28, 2009

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1 Answer

Changed the pcv box on a 2002 volvo s80 2.9l non-turbo. Was getting codes for too lean. Replaced one injector in the process. After putting it together, it started, smoked, and smelled strongly of gas. ...


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When cold starts but dies.to start, peddle to floor, rev a minute then it idles but at times dies when accelerating from a stop. Raw gas smell present and puff of blue smoke when it starts.


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Will not start after warm-up


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It has white smoke when u run it for 10 min it stops


Sounds like a bad head gasket. Check your oil after car sat all night. See if there is white , or any signs of water in your oil. Smell dipstick at the same time to see if there is the smell of gas in the oil. While car is cold check the coolant for traces of oil in the cooling system. , or the smell of gas present. When the head gasket goes,it no longer separates the different ports for oil, coolant, and gas mixtures. What happens is that coolant gets into your engine cylinders where gas, oil, and air mix, and ignite. This causes steam to come out of the tail pipe. If you are going to change it yourself, keep me informed and I can walk you through it. What size motor is in the car?

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I know you mentioned the EGR valve has been replaced, but you may have a bad 'new' part. I know the car is electronic, but has anyone checked its ignition timing (timing belt been looked at, I know it only has 77k on it). Is the fuel pressure regulator OK and it vacumm supply?

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Engine Trouble


Your getting backfires? hmm interesting. Seems like your engine is getting flooded and either purging it out of the exhaust or burning it all at once or both (backfire). Sounds like a leaky engine valve to me.There again the bluish smoke indicates to me thatyou are leaking oil somewhere- bad rings or head gasket maybe, which could cause a loss of compression which could also cause your problems.That rattling from the left/rear side sounds like a bad muffler try kicking the muffler (not hard though) next time you walk by it.

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