That is what my car sounds like at WOT. I stepped down to 2 step colder plugs the other day and gapped them at .029. I got bored today and gapped them at .032 to see what would happen. Well when I go WOT it sounds like a machine gun fire and the car goes no where. So I gapped them back and I get the same thing. Gapped them to a .026 and I get the same thing. I put the old plugs in which are a single step colder plug and I still get the same thing. Any ideas what is causing this?

 

any codes thrown?

 

injector seals i believe. there is a thread for the lnf's on it, might be the same on both engines

 

My 2.2 S/C automatic does this now and then. It only happens when the car is in 4th gear and if I'm going up hill and I give it more gas and it starts making that noise. To avoid it now I just blip the throttle and it downshifts me and everything is fine then. I've always been curious as to what it was though.

 

In most cases the noise is blow out from the spark plugs, kinda like being in a higher gear and going into wot just a little and it stutters some.

What I'm trying to figure out is what I am hear is spark blow out or something else because it's way more intense.

 

what kind of intake do you have?

just curious? is it the injen cai?

 

Regap your plugs to the way you had them.

 

I did. And I put the plugs I had in before, I said that in the original post.

Curious what does the car do when you cars plugs are gapped too small?

 

lol not even close man

a 2 step colder plug is to cold to begin with try rolling into it and see if it still does it

 

What valve springs are you running? maybe something broke did it just start doing this?

 

https://www.cobaltss.net/forums/2-0l...r-seal-266006/

stungun noise in boost and wot

 

He doesn't have a LNF lol

 

i know i was just saying it could be the same, but now that i think about it the lnf's are DI so its a different issue

 

and bingo was his nameo

 

Still on stock valve springs. I don't think anything broke. It almost sounds like timing. Wondering if that e85 isn't really e85 with it this cold. I'm gonna try and get ahold of mdub.

 

He helped me with my misfire problems so i would def have him look at a log before anything else.

 

try disconnecting the battery to reset the pcm
worked for me once when this happen i was stuck and did that and was on my way

 

weird, post up once your able to fix the issue man. good luck!

 

heres a little video of what its doin. im easing in to it then i go WOT. its hard to tell with the sound but when i hit 5k is when it does it. also my wideband has a mind of its own when it wants to actually work now, otherwise its staying at 14.8

 

i'm willing to bet that if your wideband were working, you'd be watching it go way lean.

whats your fuel system set up like?? almost sounds like the canister is uncovering and not pulling fuel. or youre getting some sort of fuel cut.

i know that if i have less than half a tank i can't go wide open or else the canister will uncover and that same situation will happen.

 

sounds like it running out of fuel to me also

 

Some one shooting at you? Shoot back? Call the cops?

 

no idea what that it. but that doesnt sound good at all. hope you can figure it out and get it fixed quickly

 

id fix that wideband ASAP

 

lean, way lean...

l8r,
PD