Hey guys, Well my friend has a 2009 cobalt ss turbocharged. Today he shifted from 1-2 kind of hard and before he knew it the car jerked and slowed down and now idling there is a clicking noise coming from the engine and when it is revved even a little bit there is a popping kind of noise. He threw two codes p0300 and p0303...which said something like misfire in multiple cylinders/misfire in cylinder 3. Anyone experience this or know what could possibly be wrong. Thanks.

 

Was the car completely warmed up before he got on it like that?

 

pretty sure, he drove it to the bagel store which is like 5-7 minutes away after it ran alittle before he left. I have a video of what it sounds like but im not sure how to upload videos to this forum...anyone help?

 

You need to upload the video on photobucket or youtube or anything similar, then copy the link of the video here.

 

Does it sound like a subie?

 

sounds like he tried a no lift shift and wasnt fast enough. lol it happens. Did he turn the car off then back on after, cause when u do a nls wrong and it misfires like that and makes that weird sound, u have to turn the car off and back on clear the code and it will be normal again. at least im my expirience thats how it was, both times.

 

car wasnt warmed up all the way/thread

 

No /thread it still sounds like that something is still wrong he either blew a sensor or cracked a ringland or something

 

heres the video i took YouTube - VID 20110210 162848

the commentary in the video is a joke lol dont know wtf i was sayign

 

Yeah he's f$%ed def blew something probably a piston

 

btw the car IS warmed up and was warm before the problem happened...its an obvious problem not the car being cold....and we brought it to my friends garage and we disconnected the battery for approx. 30 minutes then reconnected it and started it up again...same problem, when you give it any gas the popping/crackling sound coming from the engine is so violent lol

 

Do a compression test I bet you find a cylinder down or just start pulling the motor apart maybe apply for a loan GL

 

that is def fucked up. sure he did not shift into 1st while trying to go to third.

 

man disconnecting the battery is going to nothing, thats straight mechanical failure sounds.

take it to the dealer demoded and maybe get lucky

 

Diff need to pull the head. Could be a bent valve that is stuck open that the piston is hitting also.

 

that is one expensive bagel your friend just ate.

 

Sounds like the rod snapped real good. Sorry dude.

 

car only has 18k on it, he has a dealer warranty.... only performance upgrade is a downpipe which he is going to swap out for the stock downpipe...otherwise the car is completely stock, think theyll fix it?

 

I doubt it...

 

im guessing they don't cover engine stuff?

 

could go either way probably should if he is truly stock but they could throw the abuse card

 

Correct^^

 

they will fix it. make sure you disconnect both battery terminals and touch them together prior to the dealer

 

is that a joke?

 

not a joke it will erase what happened to car prior to throwing codes. my guess is he revved the **** out of it like you said or missed a shift, this will erase all codes and do not start it again after doing what i said. remember just the the positive cable to the negative cable away from the battery. tell them you do not know what happened just started making funny noise