cwlaser90

hey guys
well guys i just baught my cobalt ss about a week ago and so far i seem to really like it. Ive owned mitsubishi's since the day i started driving so the cobalt is a whole new world for me. Well today must of been my lucky day because me and my brother own a detail shop and we got a cobalt in from a local dealership and it had some nice goodies on it and they wanted it turned back to completly stock!
Well i poped open the hood and there was a nice shinny and looked to be brand new K&n typhoon intake. I started looking all over and noticed it had a full vibrant exhaust includeing a vibrant header and downpipe, touch screen tv and a huge sub box in the trunk. I called the dealership and they said i could have all of it!
well i installed the intake and took it out for a quick spin and noticed a very nice increase and on top of that the engine screams at hi rpms lol. i pulled the header and downpipe and it looked to be brand new also. I looked around and found that the vibrant header runs around 600.00!
well i installed it and i have a slight leak where the header and downpipe bolt up but nothin to bad. i messed with that for awhile and then finally pulled it out to test it out. soon as i started to pull out there poped up a check engine light. i took it out for drive and i noticed a big gain and a hard steady pull from 4.5k all the way to redline. the more i drive it the better it seems to pull. Ive never felt a intake and header/downpipe do so much. Its like night and day.
anyways is the check engine light normal with these mods? i noticed when i was in 5th gear at about 2k rpm and i floored it or just put alittle loud on it and the engine kinda stumbled and it kept doing it every time i put loud on the engine. i know thats a low rpm but i was just checking response in all rpms and it just started stumbleing or sputtering. its never did that before. but if i downshifted and went threw the rpms it wouldnt do it. also if i take it to the dealership will they complain or void my warranty for these 2 bolt ons?
i researched and couldnt find anything about a check engine light after simple bolt ons. btw i will be taking it tom. to pull codes from autozone.
thanks alot guys. This seems to be a awesome site

_UnLiMiTeD_

when doing full exhuast without a tune, especially if its a catless downpipe, its common to have the check engine light come on

cwlaser90

the downpipe has a highflow cat. and i didnt install the catback. After doing some research, i found out that the ss has 2.5in exhaust? if thats correct which it seemed when i was under it, i was gunna keep my catback. Plus i like the way it sounds after the header. nice rumble but not loud. All my buddies keep telling me to instal it but would i notice anything with the catback also? besides it being much louder? cause it sound great on the other cobalt which was a 2.2 but was loud ass hell n im not into that anymore (sick of cops mainly). also my buddy has a ss/sc and he had his tuned and recomended me to a guy to get mine done once i started doin some mods but will tuning take my check engine light away? cause with only 16k miles and me only owning it a week, the check engine light annoys the **** out of me. lol

_UnLiMiTeD_

if the check engine light is caused by the exhuast, which im almost positive thats why, then yes a tune can eliminate that check engine light. depends on the tuner

Hockeyman

iTrader: (4)

any different cat besides stock will usually throw a CEL. My guess is that you have p0420. You can get it tuned out or try the anti-fouler mod.

saunders1986

iTrader: (1)

the sputter ur getting is spark blow out, its almost like a hickup, you need to regap ur plugs

mmcgee123

iTrader: (1)

good ol p0420 get a tune!

wesg631

i dont mean to thread jack but that spark blow out would that happen with a auto tranny i have a k&n intake and since i got it when i hammer it from a cruising speed when it upshifts the motor falls on its face its like that traction control kicked in

saunders1986

iTrader: (1)

no spark blow out is more like a "fart" lol... when u hammer it, it'll make a little hickup, pop, but than will go on like normal..... lasts for like half a second

wesg631

oh does anyone have an idea to why my motor does that

cwlaser90

From what saunders1986 said above we need to regap our spark plugs n it should go away

cwlaser90

hey guys i got another question. If i get the jet stage 2 chip would i still need to get a tune? i was wondering cause im debating on getting it within the next couple days but if i didnt need tuned afterwards or i didnt at all with it i was gunna go to summit and get one today. thanks

MikeyB

It sounds like you have p0420 from your header / dp leak. mine had a leak and threw p0420 till i got the leak fixed

Bika

iTrader: (3)

jet chips are simply a rip off and do nothing for our cars. find someone with hptuners or efi live and get a real tune.

*edit* I see you have a 2.4. I highly doubt you are getting spark blow-out. that usually only happens with the s/c cars.

saunders1986

iTrader: (1)

happes with the 2.4 as well, my buddys does the same thing

cwlaser90

well i took it and pulled the codes from autozone and it gave me 5 codes all for the o2 sensor. so i erased them and started it up and no light. took the checker back inside came out started it and boom instantly check engine light back on so i checked it agian and this time only 2 came up for the o2 sensor. it was code p032 or 31 couldnt remember but it said bank one o2 sensor heating circuit twice. any ideas? it wasnt any code mentioned that it should of popped up so idk

mmcgee123

iTrader: (1)

auto zone is retarded I'm a tech and ppl bring in this print out of the codes 99% of the time there wrong and there pulling them with a 60$ scanner and a kid who has no clue what' he's doin we have two scanners the OTC genisys($4000) and the snap on versus ($8000) unless u hooked up ur o2's wrong which is nearly impossible I bet u its just the po420 catalytic low efficency find someone with hptuners or get trifecta like I did

Bad05SS

i hate you....... lol j/k i was in town and passed the dealer i got my car from, and there in the front want a ss someone traded in for another car and it had a nice set of wheels so i went and talked to the guy who sold me mine and i was like look can i trade you my stock ss wheels for the ones one the other ss? well he took me to talk to the used car sales mang. well they said yes!!!!! i was like what? i was suppose to do the trade to day but the guy called and said they had a buyer for the car. so now i wait!

MAJIN

I have never ever heard of a dealership ever saying that ever expecially to a detailing shop! Are you sure its not a chop shop? Just curious! Kind of fishy if you ask me!

cwlaser90

i pulled the codes myself i didnt have anyone else do it. But i dont see why it would give me a wrong code twice even after reseting it. No codes about a cat.
we do more than just detailing but i took the car in my shop to remove the body kit that was literally falling off n thats where everything fell into place. this is the same dealership i baught my cobalt from, there cool. Dealerships dont want modified cars hence why i got to take everything and turn it stock worked out for them and me

mmcgee123

iTrader: (1)

if u have a scanner then datastream it and see if ur o2's stay closed loop when u car is warmed up if so u have a problem with the heater circuit of the o2

Mindrot

iTrader: (1)

Chase.. way to thread jack lol