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Flashing check engine light!!

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ummmm i think u chipped a piston from the way ur motor sounds... pull all the plugs out of front bank and see if theyre bent.
 
Why the check engine light is flashing ? ( sorry if i do some typing mistake..i speak french)
 


cuz ur car is misfiring like sunnofabeeeeotch. prob cuz ur front bank plugs are smashed or broken due to pieces of piston exiting through ur motor.
 
when mine did it it was wires, i changed all the crappy generic platinum ones it came with to NGK copper plugs and changed the wires, but yours sounds like a piston mess :(

good luck and keep us posted
 
p0306 is a cylinder 6 missfire. Pull that plug and see what it looks like. It is the rear right as you look at the engine.
 


I had the same problem on my trailblazer, i p300 i changed all my plugs but turned out coil #2 and #3 where bad, so maybe if you juste change the plugs and wires youll be good to go
 
He's what happened.

Cold weather...

More knock...

You went WOT...

Your CEL started flashing...which led too...

Piston or Pistons chipped...

You got lucky the chip or chips basically disintegrated and went into the oil pan...

Now you just have a P0300 random misfire code from the pieces of piston or pistons missing but your motor still runs and you're revving the crap out of it...for now...

Go yank the plugs...as we are still waiting for those pictures.
 


By the way i never used NOS since i have this car and, except the headers, i have the supporting modds to run a 3.4". Instead of headers i have a cut out muffler.
 
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