number three cylinder misfire

2012 CHEVROLET SPARK
50,000 MILES • 1.2L • 4 CYL • 2WD • MANUAL
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ANDREW CRONJE
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  • 5 POSTS
Start with misfire on number three cylinder. I have changed the plugs and plug-leads and coil-pack. combustion chamber stays black and spark plug, if take off cylinder head, but valves is white.
Jul 24, 2016 at 10:05 PM
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ANDREW CRONJE
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Can you tell me the torque settings of cylinder head of that car? Please.
Jul 24, 2016 at 10:36 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
did you take the head off already? then you have to re-time cam etc. on misfires I always recommend that you take to a professional because it can be a basic engine problem, injector or any sensor messing up causing this. It is the cheapest option so you do not end up dumping money into good parts like you already have and doing unnecessary work. we do not list a 2012 on a 2013 head bolt torque is 16 ft lbs + 82 degrees. see picture.
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Jul 25, 2016 at 12:08 AM
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ANDREW CRONJE
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So you cannot tell me definitively on number three all of them doing it. that it is an injector.
Jul 25, 2016 at 12:14 AM
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ANDREW CRONJE
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Car was driving fine and all of sudden while driving start misfire on number three.
Jul 25, 2016 at 12:17 AM
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ANDREW CRONJE
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  • 5 POSTS
Combustion chamber black and spark plug black on number three.
Jul 25, 2016 at 12:18 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
unless you do a freeze frame and go through all the sensors and check fuel pressure with a gauge you wont know a thing other than it is misfiring.
Jul 25, 2016 at 12:44 AM
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